geekhack

geekhack Projects => Making Stuff Together! => Topic started by: Oobly on Thu, 07 November 2013, 03:45:25

Title: Cherry MX Trampoline Mod!
Post by: Oobly on Thu, 07 November 2013, 03:45:25
Okay guys, here is a little mod MKULTRA mentioned and I figured out how to do with what I had on hand at the time in response to a question posed by DarkOvi here: http://geekhack.org/index.php?topic=50107.0

I call it the "Trampoline Mod"TM . If I find the original mod I will change the title to match :) It gives a nice soft springy landing:

You cut a piece of oring (or other suitable piece of rubber):

[attach=1]

Then you place it carefully in the tube of the MX switch base and push it to the bottom (NOTE: I haven't pushed it in yet in this pic, just put it in place):

[attach=2]

Reassemble the switch and enjoy oneness with oring rubber.

This mod reduces the distance to bottom out after the activation point. You can use different length pieces to adjust the amount of travel. You can also try different materials for a different feel. With about 2mm and a soft oring you can start to feel the resistance increase about 1mm after activation. The resistance increases nicely and you can press the key almost to the original bottom out point with enough pressure.

[EDIT] - I think this is the original mod: http://www.kbdmania.net/xe/best_article/3354636  [/EDIT]
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Thu, 07 November 2013, 03:50:47
Here you can see the travel reduction. This is where you start to feel an increase in resistance:

[attach=1]

Completely depressed:

[attach=2]

For comparison, here is a switch of the same type (brown) with the same keycap and an oring:

[attach=3]
Title: Re: Cherry MX Trampoline Mod!
Post by: DamnDan on Thu, 07 November 2013, 04:18:52
WOW, and this can be done much cheaper using rubber bands O,o nice work!
Title: Re: Cherry MX Trampoline Mod!
Post by: rowdy on Thu, 07 November 2013, 04:26:44
This kinda like floss mod for BS.
Title: Re: Cherry MX Trampoline Mod!
Post by: jevvix on Thu, 07 November 2013, 04:49:22
Tried the o-ring mod and didn't like it. Going to give this one a shot. Thanks for the idea!
Title: Re: Cherry MX Trampoline Mod!
Post by: nubbinator on Thu, 07 November 2013, 11:14:38
This kinda like floss mod for BS.

The floss mod doesn't really affect the throw of the switch though, it just dampens the spring.  This is more like a landing pad for the stem instead of the key cap and one that more dramatically affects the throw of the switch.  Definitely an interesting take on it.  I'd just be afraid that it would make the switches feel mushy or distort the stem over time.
Title: Re: Cherry MX Trampoline Mod!
Post by: CPTBadAss on Thu, 07 November 2013, 11:16:41
Oooo, quick, someone send me some o-rings so I can try this out! :P

Seriously though this looks cool. How does it feel Oobly?
Title: Re: Cherry MX Trampoline Mod!
Post by: SpAmRaY on Thu, 07 November 2013, 11:20:01
Now we need custom cut pieces to size!!
Title: Re: Cherry MX Trampoline Mod!
Post by: Hellmark on Thu, 07 November 2013, 11:20:01
Plus doing this, you don't really need that many orings, since you can do several switches with a single oring.
Title: Re: Cherry MX Trampoline Mod!
Post by: AGmurdercore on Thu, 07 November 2013, 15:37:06
That is a really interesting idea for boards that have plates (or have no plates) that enable the switches to be opened. I will try this with the few extra switches that i have ^^
Title: Re: Cherry MX Trampoline Mod!
Post by: MKULTRA on Thu, 07 November 2013, 15:48:41
Yeah this is sorta what I meant in the other thread.  However it is better to use a sheet of rubber and punch holes out of that for consistency.  I never could find the picture of the mod but this is the right idea.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Fri, 08 November 2013, 01:59:53
Yeah this is sorta what I meant in the other thread.  However it is better to use a sheet of rubber and punch holes out of that for consistency.  I never could find the picture of the mod but this is the right idea.

Great! The punch idea is excellent. I have found I like quite small pieces with soft rubber best, between 1 and 1.5mm. It gives a nice soft landing with just enough rebound. Feels a lot better than normal orings to me. More progressive and somehow higher quality.

If I were doing this mod to reduce travel I would use a hard rubber, or hard plastic with a short soft rubber piece on top. A long piece of soft rubber (2mm or more) feels really mushy and weird.

I hope whoever came up with the mod doesn't mind me posting it here. I will change the first post since I actually didn't invent the mod, just came up with this version of it.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Fri, 08 November 2013, 02:17:39
I think I might have found it!

http://www.kbdmania.net/xe/best_article/3354636

Looks like the flat parts actually bottom out first, leaving 0.8mm gap under the pin. Interesting.
Title: Re: Cherry MX Trampoline Mod!
Post by: SpAmRaY on Fri, 08 November 2013, 08:28:18
I think I might have found it!

http://www.kbdmania.net/xe/best_article/3354636

Looks like the flat parts actually bottom out first, leaving 0.8mm gap under the pin. Interesting.

Very interesting, will bookmark that for future resource!
Title: Re: Cherry MX Trampoline Mod!
Post by: korrelate on Fri, 08 November 2013, 08:42:05
You know what I think would be awesome here?

Rubber ball bearings. If you could get little rubber beads of the same diameter as the ID of the spring. Drop them in and bang!
Title: Re: Cherry MX Trampoline Mod!
Post by: SpAmRaY on Fri, 08 November 2013, 08:45:55
You know what I think would be awesome here?

Rubber ball bearings. If you could get little rubber beads of the same diameter as the ID of the spring. Drop them in and bang!

 :o is that even a thing.....

/me runs to google and amazon and ebay...
Title: Re: Cherry MX Trampoline Mod!
Post by: MKULTRA on Fri, 08 November 2013, 09:51:28
You know what I think would be awesome here?

Rubber ball bearings. If you could get little rubber beads of the same diameter as the ID of the spring. Drop them in and bang!
Genius.
Title: Re: Cherry MX Trampoline Mod!
Post by: korrelate on Fri, 08 November 2013, 13:24:52
If you guys find something like ^^^ please post it up here. As a knee jerk reaction, the first thing I thought about was the PTFE bearings that mkawa sent me in one of his lube kit betas but those strike me as too hard for this application. But are PTFE bearings with different elastic limits in different IDs??? IDK, but very curious. I have a ton of sh*t I have to get over the next few days, so I don't have the time to follow up on this, but I'm very curious to know what you find!!


The only drawback that I see to this approach is this: there really is only one ID that would work. I'e you'd want one that sat in one position at the bottom of the spring well, and to do that it'd have to very tight tolerances between the spring and the bearing. But a bearing/bead/ball that did that would me that you wouldn't really have to much choice in the reduction of travel of switch (i.e. it's always going to be reduced by the OD of the bearing that fits in the spring well.

Cheers,

K
Title: Re: Cherry MX Trampoline Mod!
Post by: regack on Fri, 08 November 2013, 13:51:25
Anyone have a spring they can measure?

http://cicball.thomasnet.com/category/rubber-balls-2

Title: Re: Cherry MX Trampoline Mod!
Post by: MKULTRA on Fri, 08 November 2013, 15:17:58
Anyone have a spring they can measure?

http://cicball.thomasnet.com/category/rubber-balls-2
The dimensions of that hole are around here somewhere, that is what you need not the dimensions of the spring.  Lemme check the Cherry datasheets.

EDIT:

You need the dimensions of the thing outlined in red

(http://i1166.photobucket.com/albums/q603/magicmeatballs/Lube%20Guide/27c90ffd.jpg)

If I had a caliper I would measure it but I do not.
Title: Re: Cherry MX Trampoline Mod!
Post by: jeffgran on Fri, 08 November 2013, 18:15:06
Anyone have a spring they can measure?

http://cicball.thomasnet.com/category/rubber-balls-2

Ooh, nice find. It looks like you can get anything from 50A-90A hardness too, which allows for experimentation on the feel of it...
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Fri, 08 November 2013, 18:46:52
I wonder if it would be possible to get 4 per landing pad using a leather hole punch.

EK landing pad:
(http://elitekeyboards.com/proddata/images/th/sl120_cf_macro_th0x0.jpg)

Here is my leather hole punch so people know what I am talking about:
[attachimg=1]

I think the balls that were linked previously may work better because they are spherical, so it will probably have a depression pressure that increases slightly the farther you press it.  It should give it a nice bounce back...

I have some silicone pads (with very small air pockets, kinda like the ek landing pads) that could work pretty well as well if I punch out sections of it.  What other materials do you think could work if you used a leather hole punch?

I am not sure I want to desolder my filco to try it.  haha
Title: Re: Cherry MX Trampoline Mod!
Post by: MKULTRA on Fri, 08 November 2013, 19:14:18
I wonder if it would be possible to get 4 per landing pad using a leather hole punch.

EK landing pad:
Show Image
(http://elitekeyboards.com/proddata/images/th/sl120_cf_macro_th0x0.jpg)


Here is my leather hole punch so people know what I am talking about:
(Attachment Link)

I think the balls that were linked previously may work better because they are spherical, so it will probably have a depression pressure that increases slightly the farther you press it.  It should give it a nice bounce back...

I have some silicone pads (with very small air pockets, kinda like the ek landing pads) that could work pretty well as well if I punch out sections of it.  What other materials do you think could work if you used a leather hole punch?

I am not sure I want to desolder my filco to try it.  haha
It really depends on how much you want to reduce the key travel.
Title: Re: Cherry MX Trampoline Mod!
Post by: korrelate on Fri, 08 November 2013, 20:05:28
Anyone have a spring they can measure?

http://cicball.thomasnet.com/category/rubber-balls-2
The dimensions of that hole are around here somewhere, that is what you need not the dimensions of the spring.  Lemme check the Cherry datasheets.

EDIT:

You need the dimensions of the thing outlined in red

Show Image
(http://i1166.photobucket.com/albums/q603/magicmeatballs/Lube%20Guide/27c90ffd.jpg)


If I had a caliper I would measure it but I do not.


I don't know why you've suggested the outer diameter of the post. Here's why I am suggesting the ID of the spring:

1. Take a close look at the pic in the first post. That piece of ring is sitting inside the tube. Why? Because the OP is trying to soften/reduce the travel of the switch.
2. The way that OPs approach reduces/softens travel is this: Inside that tube on the bottom of the switch housing is where the spring goes. Also inside that tube (and inside that spring) is where the post, located underneath the colored, traveling part of the switch, is a post. If you have a spare switch sitting around, open it up and look underneath... you'll see the post that I'm talking about. I'm assuming that the role of that post is to keep the colored part of the switch oriented properly while it travels.

I'm pretty sure that the OPs approach works because that post hits the piece of the ring that he has deposited there.

My comments are an adaptation of the OPs approach. Instead of the post hitting the piece of ring, I'm suggesting depositing a little rubber ball. The post would hit that little rubber ball to soften/reduce the travel instead of the ring. The more snugly the ball fits inside the spring the less bounce/rattle the switch should have.


It could be that a rubber bead with a diameter small enough to fit inside the post, though, isn't big enough to stop the switch. Totally depends on the clearance between the bottom of the post (when fully depressed) and the bottom of the tube.
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Fri, 08 November 2013, 20:31:40
I could totally be wrong here, but doesn't the spring go on the outside of the post at the bottom of the switch housing?  Please correct me if I am wrong.
Title: Re: Cherry MX Trampoline Mod!
Post by: korrelate on Fri, 08 November 2013, 20:39:01
Springs sit inside the post. I just got done with a big mod project on my Filco. I'm 100% certain of  this... LOL. 100%. It was the most boring two nights of my life.

Totally worth it, but absolutely boring. I had to:
- desolder all of the browns from my Leo
- desolder all of the reds from my Filco.
- lube all of the browns (this is so super boring there's no words for it).
- solder all of the browns back in.

Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Fri, 08 November 2013, 21:42:51
Springs sit inside the post. I just got done with a big mod project on my Filco. I'm 100% certain of  this... LOL. 100%. It was the most boring two nights of my life.

Totally worth it, but absolutely boring. I had to:
- desolder all of the browns from my Leo
- desolder all of the reds from my Filco.
- lube all of the browns (this is so super boring there's no words for it).
- solder all of the browns back in.

Haha.  Fair enough.  I will take your word for it.  I think you probably have it burned into your brain at this point.  :)
Title: Re: Cherry MX Trampoline Mod!
Post by: korrelate on Fri, 08 November 2013, 22:36:36
I think I might have found it!

http://www.kbdmania.net/xe/best_article/3354636

Looks like the flat parts actually bottom out first, leaving 0.8mm gap under the pin. Interesting.

^^^^^ What an excellent find!!!! No doubt about it!!!! Looks like the shoulders bottom out before the pin/post hits the bottom of the well.

I'll tell you what: the more I learn abiut the mx switch the more I like it. It is just so damn hackable!!!
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Fri, 08 November 2013, 22:48:58
Anyone have a spring they can measure?

http://cicball.thomasnet.com/category/rubber-balls-2

Looking through those balls, I think this one would probably be the best.  It has Excellent impact resistance and seems to be the most suited to have constant wear and tear...

http://cicball.thomasnet.com/item/rubber-balls-2/pure-gum-rubber-balls/pn-1072
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Sat, 09 November 2013, 04:19:08
Springs sit inside the post. I just got done with a big mod project on my Filco. I'm 100% certain of  this... LOL. 100%. It was the most boring two nights of my life.

Totally worth it, but absolutely boring. I had to:
- desolder all of the browns from my Leo
- desolder all of the reds from my Filco.
- lube all of the browns (this is so super boring there's no words for it).
- solder all of the browns back in.

Sorry, the spring fits outside the post: http://deskthority.net/wiki/File:Cherry_MX_--_opened,_1.jpg

I have some loose switches and can measure the tube inner diameter later today and post more info.

I'm sure you'd be able to get 4 out of each soft landing pad, but I'm not sure about the thickness since there is a 0.8mm gap between the pin and bottom of the tube at full press.

Another idea is to put thin adhesive foam tape (0.6mm?) on the flat pieces on either side of the stem. Limits the options, though, so if you don't like the feeling the piece / ball in the tube is more flexible. Can also put pieces on the top casing to dampen the sound on release, I will try to take pics and post more info later today if I can find the time.
Title: Re: Cherry MX Trampoline Mod!
Post by: korrelate on Sat, 09 November 2013, 09:52:43
Holy God do I feel stupid.

I just read the post above, ran off upstairs in a huff, saying to myself saying, "That's it. I'll prove it to these guys that the springs sit inside." So... I fished out my switch top removal tool, grabbed one of the clears that I bought for my next board and what did I see???
[attach=1]

Talk about eating a piece of humble pie!!! My apologies folks!!! My only excuse my two year old is killing my memory!!! I am totally kicking myself in the a** over this!!!

I feel like such a freaking idiot I can't even begin to explain....
Title: Re: Cherry MX Trampoline Mod!
Post by: MKULTRA on Sat, 09 November 2013, 10:11:34
Hahah its not a big deal man.  But you need the inner diameter of that post because that is what the ball would go inside of.
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Sat, 09 November 2013, 10:52:42
Are the stems on all cherry switches the same length?  I seem to remember seeing some pictures where it looked like the different cherry switches had slightly different stem lengths.  I will have to go looking.

If there are differences, then the key travel will change between switch types with the same mod.

Edit: it looks to me like clicky switches have longer stems. Is that my imagination?
(http://wiki.geekhack.org/images/d/d2/Cherry_MX_Sliders_Side_Profile.jpg)
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Sat, 09 November 2013, 11:12:17
No worries, korrelate.

The inner diameter of the posts is 2mm as measured by caliper.

I do believe the clicky stem pin is longer than the linear and tactile ones. I suspect this is so they bottom out at the same point since the linears and tactile ones bottom out on the flat part of the stem, but the clickys bottom out on the pin. This means they shouldn't have that 0.8mm gap when pressed.

This will result in a different feel and bottom out point if you use the same softness and size rubber pieces.

Those natural rubber balls look like they would do the job nicely! If they come in 2mm size or smaller they should work fine and provide a consistent feel. Great ideas, guys!
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Mon, 11 November 2013, 02:28:11
After trying a few different materials and lengths I have decided that 1.5mm red oring sections feel best to me. I tried latex, pieces from a rubber anti-slip mat and the orings.

I also tried another little mod this weekend. Just on a loose switch for now, but I'll probably do this at the same time as trampoline modding the rest of the switches on my keyboard (man, I have to mod the plate so I don't have to desolder anything any more).

I put a little "latex milk" on the top piece of the case where the slider hits on the upstroke. Let it dry and assembled the switch. The effect is subtle but noticeable. It dampens the sound a little and changes the tone a touch.

[attach=1]

I like the feeling of the switch with both mods done, expecially with heavy keycaps. It makes for a very quiet keyboard and feels very different to stock switches.
Title: Re: Cherry MX Trampoline Mod!
Post by: Glod on Mon, 11 November 2013, 10:34:54
latex, ha never would have thought of that
Title: Re: Cherry MX Trampoline Mod!
Post by: MKULTRA on Mon, 11 November 2013, 16:57:14
After trying a few different materials and lengths I have decided that 1.5mm red oring sections feel best to me. I tried latex, pieces from a rubber anti-slip mat and the orings.

I also tried another little mod this weekend. Just on a loose switch for now, but I'll probably do this at the same time as trampoline modding the rest of the switches on my keyboard (man, I have to mod the plate so I don't have to desolder anything any more).

I put a little "latex milk" on the top piece of the case where the slider hits on the upstroke. Let it dry and assembled the switch. The effect is subtle but noticeable. It dampens the sound a little and changes the tone a touch.

(Attachment Link)
Interesting mod.  You may wanna try and find just some straight rubber or silicon, similar to what the o-ring is made of, because if you cut pieces out of o-ring they will naturally curve which may vary in feeling on different keypresses or as you break it in.

I like the feeling of the switch with both mods done, expecially with heavy keycaps. It makes for a very quiet keyboard and feels very different to stock switches.
Title: Re: Cherry MX Trampoline Mod!
Post by: catnipz0098 on Mon, 11 November 2013, 17:02:21
Anybody have these made to fit perfectly?
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Tue, 12 November 2013, 03:52:33

Interesting mod.  You may wanna try and find just some straight rubber or silicon, similar to what the o-ring is made of, because if you cut pieces out of o-ring they will naturally curve which may vary in feeling on different keypresses or as you break it in.


Thanks. I thought about that, but it may be hard to get the silicon pieces to stick to the plastic, perhaps with some thin double-sided tape? I thought of trying some thin rubber foam tape (0.6mm) but couldn't find any at my local hardware store.

Anybody have these made to fit perfectly?

Not quite sure what you mean, but 1.5 to 2mm rubber balls would work quite well. the 3/32 balls from here may work, but they'll reduce the travel more than the 1.5mm pieces of silicone rubber I am using: http://cicball.thomasnet.com/item/rubber-balls-2/pure-gum-rubber-balls/pn-1072

Also, I don't know how much they would cost.

latex, ha never would have thought of that

It just happens to be what I had on hand, since I couldn't find the rubber foam tape I wanted to try, so I tried it out. Seems to work well. It dries to a rather thin layer, so it doesn't affect the travel much at all, but still provides some nice damping.

I have also discovered you don't have to be quite as neat as I was in that pic since the slider doesn't touch most of the area around there at all.

I have finished trampoline and latex modding one half of my board and it feels... nice. Different. Quiet. I'll try to get some video of a comparison between stock switches and these. I suspect it feels a lot like an HHKB with the tactility a bit further down in the press and the actuation higher (very bold claim, I know, and since I don't own a Topre board I can't really compare). I think I will be able to type faster and more accurately with these than any other switch I have tried so far.

Since you don't feel or hear the botttoming out "click" and the release "click" is also softer, there is a little less confirmation of actuation even though the tactile bump is still there. The bump somehow feels a little less prominent, although I suspect that is psychological due to the lack of sound. I have a few 62g Ergo Clears on the board (the arrow keys, below the main set of 15 alpha chars and the thumb buttons) and the more tactile bump is nice with this mod.

I would love for someone who owns a Topre board and a board with MX Browns or Ergo Clears to try this mod on some of the MX switches and give a comparison report, but that's asking a lot I know.

My favourite switches are now "62g lubed and stickered, trampoline and latex modded Ergo Clears with thick PBT or POM caps"... Geez, how far down the rabbit hole am I?
Title: Re: Cherry MX Trampoline Mod!
Post by: jeffgran on Tue, 12 November 2013, 15:59:33
Since you don't feel or hear the botttoming out "click" and the release "click" is also softer, there is a little less confirmation of actuation even though the tactile bump is still there. The bump somehow feels a little less prominent, although I suspect that is psychological due to the lack of sound.

I'd believe it. If you look at the force graph for the clears, it's different from the rest of the MX switches'. The tactile bump starts almost immediately. So even if you only reduced the travel at the beginning of the key movement (like maybe 0.5mm or even less?) you'd probably be starting your "swing" with a little of the tactile bump already covered. It's hard to describe that in text, hope that made sense.


My favourite switches are now "62g lubed and stickered, trampoline and latex modded Ergo Clears with thick PBT or POM caps"... Geez, how far down the rabbit hole am I?

LOL, I'm not there yet but I do believe I have the potential to get there, for better or for worse, some day. :)
Title: Re: Cherry MX Trampoline Mod!
Post by: jeffgran on Tue, 12 November 2013, 16:15:18

Not quite sure what you mean, but 1.5 to 2mm rubber balls would work quite well. the 3/32 balls from here may work, but they'll reduce the travel more than the 1.5mm pieces of silicone rubber I am using: http://cicball.thomasnet.com/item/rubber-balls-2/pure-gum-rubber-balls/pn-1072

Also, I don't know how much they would cost.


Google tells me that 3/32 is 2.38125mm, so if your 2mm measurement is accurate, you'd probably have to shove them in there, which I suspect might severely limit their "bounce" factor.

This place seems to say that they can make little balls of any size in any material, and they have a "standard" product that's EPDM rubber, 1/16 in. (1.5875mm) diameter:

http://catalog.precisionplasticball.com/viewitems/rubber-resin-balls/buna-rubber-resin-balls

Not sure if they'd sell small quantities though. The little pieces of an o-ring might be the best option. Maybe a really big diameter (but thin) o-ring would minimize the curvature of the piece. Or maybe you want that little curvature for extra springiness, like a buckling spring...
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Thu, 14 November 2013, 03:37:34
Okay, I've finished trampoline and latex modding my whole board:

[attach=1]

And... It feels simply amazing! The switches are the quietest I've ever tried and the feeling is just superb, definitely was worth the effort for me. I am starting to like the Browns more and more. Now I can't decide if I prefer the Ergoclears or Browns with this mod.  :-\

I made a comparison video with my phone, but the microphone on it isn't very good. It picks up high frequencies a lot better than lows, so the modded switches sound a lot more clicky than they really are. I don't have any editing software installed at the moment either, so, sorry for the quality, but maybe you can tell something from it at least. The left side has stock browns, the right is trampoline and latex modded. No orings fitted to either side.


The pieces of oring work very well. You can cut them with straighter edges or more angled and try different lenths to adjust the feel. Nice for testing and finding what you like best. Be sure to try it with a mounted switch with a cap on, that's the only way to really check how it will feel in use. I got about 9 usable pieces per oring with a few pieces which were too small left over. Very economical  ;)

I did have one "oops" moment while modding:

[attach=2]
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Thu, 14 November 2013, 10:09:46
Okay, I've finished trampoline and latex modding my whole board:

(Attachment Link)

And... It feels simply amazing! The switches are the quietest I've ever tried and the feeling is just superb, definitely was worth the effort for me. I am starting to like the Browns more and more. Now I can't decide if I prefer the Ergoclears or Browns with this mod.  :-\

I made a comparison video with my phone, but the microphone on it isn't very good. It picks up high frequencies a lot better than lows, so the modded switches sound a lot more clicky than they really are. I don't have any editing software installed at the moment either, so, sorry for the quality, but maybe you can tell something from it at least. The left side has stock browns, the right is trampoline and latex modded. No orings fitted to either side.


The pieces of oring work very well. You can cut them with straighter edges or more angled and try different lenths to adjust the feel. Nice for testing and finding what you like best. Be sure to try it with a mounted switch with a cap on, that's the only way to really check how it will feel in use. I got about 9 usable pieces per oring with a few pieces which were too small left over. Very economical  ;)

I did have one "oops" moment while modding:

(Attachment Link)

Good work, they sound great.  Now they probably feel like TOPRE!!!  Well maybe not...  :)
Title: Re: Cherry MX Trampoline Mod!
Post by: danielucf on Thu, 14 November 2013, 15:25:57
quiet you say? I may make a 60% with the trampoline mod for typing in class on a mechanical keyboard and being quieter than those on their laptops.
Title: Re: Cherry MX Trampoline Mod!
Post by: mashby on Thu, 14 November 2013, 17:30:19
Thank you for the video, you can really hear the difference! I think I'm going to have to try this mod on at least one board.
Title: Re: Cherry MX Trampoline Mod!
Post by: thoere on Sat, 16 November 2013, 22:32:01
Those look really fun to type on. I want to try this with Jailhouse Blues.
Title: Re: Cherry MX Trampoline Mod!
Post by: jeffgran on Sun, 17 November 2013, 17:02:42
I feel so uber-nerdy saying this, but wow, that video is sexy! I want my keys to sound like that. :)

Do you have any more detail on how and where you applied the "latex milk"? I've never heard of such a thing before but obviously it works.
Title: Re: Cherry MX Trampoline Mod!
Post by: catnipz0098 on Sun, 17 November 2013, 17:30:01
Where do you buy latex milk?
Title: Re: Cherry MX Trampoline Mod!
Post by: Larken on Mon, 18 November 2013, 02:07:11
I was thinking that cutting o-rings up would be rather hard to keep consistent without alot of work, and decided to do a variation of this mod using a 2mm thick pvc antislip mat, punching out beads with a belt hole puncher (this compresses the mat by quite a bit due to the punching, so I wasn't sure how it would work out).

Happy to report that the result was a very very slight reduction in bottom out distance (probably about 0.2mm) - and a total dampening of the bottom out sound (video will follow later). This feels very different from the using o-rings under keycaps - which I'd tried and really disliked.

Still have to figure out how to do latex mod or a quasi replacement without access to latex milk though - have to say it would make quite a difference wrt to keys larger than 1x as the pop up sound is alot more obvious for larger keys.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Mon, 18 November 2013, 03:47:15
Liquid latex, latex for making molds. It is sold at a lot of hobby / craft stores. It's also used by special effects makeup artists for making fake wounds, etc. It smells kind of bad before it dries, since it has a little ammonia in, but it is water based. After drying it doesn't smell any more.

I use a small screwdriver dipped in the liquid and just spread it on the small flat area right at the top on the inside of the top casing. I clean any lubricant off first with an earbud (q-tip, cotton bud, whatever they are called). It's okay if it gets on the other angled pieces around there too (so you don't have to be all that precise) since the slider doesn't actually touch those bits, just the vertical parts on the sides and the small flat pieces.

It may actually be possible to do the latex mod without opening the keys, but not very easy since you have to try to get it under the top edge of the casing and will have to keep the switch pressed while it dries. Could be an option for those who don't want to desolder the switches.

I don't use any larger keys at the moment, but it makes sense that they are louder due to the extra weight (momentum).
Title: Re: Cherry MX Trampoline Mod!
Post by: Larken on Mon, 18 November 2013, 05:59:05
Pictures and a video while doing the trampoline mod (bottom half only):

1. Before starting the mod - I had to take apart my ergodox to desolder 2 leds from their switches as I didn't do the switch top mods when I first built it. This is after the point when I tried the mod on my thumb buttons and decided I like it enough to do it to the whole board.

(http://farm8.staticflickr.com/7377/10924017186_6018c06e11_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924017186/)

2. Getting similar cut sizes from the table mat using a belt puncher

(http://farm8.staticflickr.com/7395/10923957735_1aeb02ae72_b.jpg) (http://www.flickr.com/photos/89364707@N02/10923957735/)

3. Another shot

(http://farm4.staticflickr.com/3785/10924242873_81a6da856d_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924242873/)

4. Putting the cut piece into the hole, then pushing it in all the way. It's good to have a torch on hand to check if you already have one in the switch (and don't use black pieces), as you don't really want more than one piece in each switch to maintain consistency.

(http://farm4.staticflickr.com/3685/10924018076_f6428876fe_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924018076/)

Rinse and repeat until all the switches are done.

5. One last shot before I put the caps back on.

(http://farm4.staticflickr.com/3721/10924244063_b3fcc63f2a_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924244063/)


Finally, the video:

modded one side of the ergodox for comparison - the right hand is fully modded, while only the 2x thumb keys on the left is modded. Note that I am pretty much hammering the buttons, so it is really much louder than it really is when in use.

I didn't want to reduce the travel too much, so I used as little stuffing as I could. There is still some notable difference in travel distance, but as long as I'm not really slamming the keys, the noise from bottoming out is minimal/not noticeable as I don't really bottom out hard while I type.

In fact, the switch resetting itself is louder as I haven't done anything like the latex mod to the tops. I do plan to do it eventually (Oobly's fully modded switch sounds really good), but haven't figured out how to get the latex milk or something similar.
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Mon, 18 November 2013, 08:46:33
I was thinking that cutting o-rings up would be rather hard to keep consistent without alot of work, and decided to do a variation of this mod using a 2mm thick pvc antislip mat, punching out beads with a belt hole puncher (this compresses the mat by quite a bit due to the punching, so I wasn't sure how it would work out).

Happy to report that the result was a very very slight reduction in bottom out distance (probably about 0.2mm) - and a total dampening of the bottom out sound (video will follow later). This feels very different from the using o-rings under keycaps - which I'd tried and really disliked.

Still have to figure out how to do latex mod or a quasi replacement without access to latex milk though - have to say it would make quite a difference wrt to keys larger than 1x as the pop up sound is alot more obvious for larger keys.

Yes, this was the idea that I posted earlier.  This is what I wanted to try...
Title: Re: Cherry MX Trampoline Mod!
Post by: korrelate on Tue, 19 November 2013, 00:41:28
Larken: thanks for the demo. Your results sound amazing. Better sounding, I think, than any Topre I have heard so far. This is really starting to get some serious traction on my to-do list.



Title: Re: Cherry MX Trampoline Mod!
Post by: Larken on Tue, 19 November 2013, 01:31:42

Yes, this was the idea that I posted earlier.  This is what I wanted to try...

Yeah, I don't know how I missed your post, would have saved me some time thinking how to go about it.. I was going to go with a standard puncher when I realised that the pieces would be too big, and I remembered my dad had a old leather punch somewhere else. Not sure if its just me, but it was hard to get a clean cut off those pieces with the leather punch I had. My hands are still sore from doing the mod yesterday.

Larken: thanks for the demo. Your results sound amazing. Better sounding, I think, than any Topre I have heard so far. This is really starting to get some serious traction on my to-do list.


The mic actually amplifies low frequencies by quite a bit. In practical use to my ears, there is hardly any bottom out noise for the 1x keys, and retaining some noise for the 2x and 1.5 keys, while the ones in the video still has a low pitched bottom out clack.

Keep in mind that the sound characteristic for this particular board is affected by the acrylic case, the padding inside (I lined it with drawer liner under the pcb), and most of all, the dsa caps, which has a rather different sound characteristic compared to using dcs caps. I actually quite enjoyed the bottom out sound on this board due to all those factors, but figured I'd try something new.  You can see another full video of me typing on the same ergodox without the mod (just stickered and lubed) in the same channel.

Next up, getting some latex milk.

Title: Re: Cherry MX Trampoline Mod!
Post by: Pacifist on Wed, 20 November 2013, 11:30:09
Show Image
Show Image
Show Image
Show Image
Pictures and a video while doing the trampoline mod (bottom half only):

1. Before starting the mod - I had to take apart my ergodox to desolder 2 leds from their switches as I didn't do the switch top mods when I first built it. This is after the point when I tried the mod on my thumb buttons and decided I like it enough to do it to the whole board.

(http://farm8.staticflickr.com/7377/10924017186_6018c06e11_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924017186/)


2. Getting similar cut sizes from the table mat using a belt puncher

(http://farm8.staticflickr.com/7395/10923957735_1aeb02ae72_b.jpg) (http://www.flickr.com/photos/89364707@N02/10923957735/)


3. Another shot

(http://farm4.staticflickr.com/3785/10924242873_81a6da856d_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924242873/)


4. Putting the cut piece into the hole, then pushing it in all the way. It's good to have a torch on hand to check if you already have one in the switch (and don't use black pieces), as you don't really want more than one piece in each switch to maintain consistency.

(http://farm4.staticflickr.com/3685/10924018076_f6428876fe_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924018076/)


Rinse and repeat until all the switches are done.

5. One last shot before I put the caps back on.

(http://farm4.staticflickr.com/3721/10924244063_b3fcc63f2a_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924244063/)


Finally, the video:

modded one side of the ergodox for comparison - the right hand is fully modded, while only the 2x thumb keys on the left is modded. Note that I am pretty much hammering the buttons, so it is really much louder than it really is when in use.

I didn't want to reduce the travel too much, so I used as little stuffing as I could. There is still some notable difference in travel distance, but as long as I'm not really slamming the keys, the noise from bottoming out is minimal/not noticeable as I don't really bottom out hard while I type.

In fact, the switch resetting itself is louder as I haven't done anything like the latex mod to the tops. I do plan to do it eventually (Oobly's fully modded switch sounds really good), but haven't figured out how to get the latex milk or something similar.

How many switches can 1 OZ of latex cover?

And Larken can you cut a bunch more for other people to use?
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Wed, 20 November 2013, 13:42:21
Nice work, Larken! I like how your 'Dox looks! The wood works really well with the retro caps.

1 oz of liquid latex will do a LOT of switches (quite a few whole boards worth). You really only need a tiny amount per switch.

I found when using a hole punch to cut pieces from an anti-slip mat that it works best if you rotate the punch at the end of the press, so it cuts the bottom edge nicely. I ended up using oring pieces instead of the mat because I thought it felt better, it gave a slightly softer landing which I liked.
Title: Re: Cherry MX Trampoline Mod!
Post by: Larken on Wed, 20 November 2013, 21:59:29

And Larken can you cut a bunch more for other people to use?

The cutting, while easy, is rather minding numbing and rather taxing on my hands to do, even for the 76 switches for the ergodox. I highly doubt I'll be able to hand cut full sets for others to use; might be better to see if there's some automated way to do it using a machine instead.

Nice work, Larken! I like how your 'Dox looks! The wood works really well with the retro caps.


Thanks Oobly! I really like how your angled thumb cluster worked out. Wish I could do that with the dox.

Quote
I found when using a hole punch to cut pieces from an anti-slip mat that it works best if you rotate the punch at the end of the press, so it cuts the bottom edge nicely. I ended up using oring pieces instead of the mat because I thought it felt better, it gave a slightly softer landing which I liked.

I realised that the pvc mat beads will undergo further compression after using the keyboard, which causes the feel to change after a few days, something I think the o-ring pieces wouldn't suffer from. While still silent in usage, the travel reduction distance is not as large as it was when I first finished the mod, which could be good and bad, depending on perspective. I personally like it, as I was getting tripped out by the earlier bottom out for some time.

One thing it does is that if the key feel wasn't consistent in the first place, the compressible pvc beads eventually seasons out to consistency after a while.

O-ring pieces would be more silent, and definitely more - to paraphrase - 'What you feel initially is what you get'; meaning the feel doesn't change as much in use. But I would guess that it is a little harder to get a consistent result in all modded switches with rubber (I was searching for 1mm rubber balls, but it appears that such things are mostly only made by suppliers for industrial/medical applications, and doesn't sell to the general public.
Title: Re: Cherry MX Trampoline Mod!
Post by: dustinhxc on Mon, 25 November 2013, 19:44:34
Show Image
Show Image
Show Image
Show Image
Pictures and a video while doing the trampoline mod (bottom half only):

1. Before starting the mod - I had to take apart my ergodox to desolder 2 leds from their switches as I didn't do the switch top mods when I first built it. This is after the point when I tried the mod on my thumb buttons and decided I like it enough to do it to the whole board.

(http://farm8.staticflickr.com/7377/10924017186_6018c06e11_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924017186/)


2. Getting similar cut sizes from the table mat using a belt puncher

(http://farm8.staticflickr.com/7395/10923957735_1aeb02ae72_b.jpg) (http://www.flickr.com/photos/89364707@N02/10923957735/)


3. Another shot

(http://farm4.staticflickr.com/3785/10924242873_81a6da856d_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924242873/)


4. Putting the cut piece into the hole, then pushing it in all the way. It's good to have a torch on hand to check if you already have one in the switch (and don't use black pieces), as you don't really want more than one piece in each switch to maintain consistency.

(http://farm4.staticflickr.com/3685/10924018076_f6428876fe_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924018076/)


Rinse and repeat until all the switches are done.

5. One last shot before I put the caps back on.

(http://farm4.staticflickr.com/3721/10924244063_b3fcc63f2a_b.jpg) (http://www.flickr.com/photos/89364707@N02/10924244063/)


Finally, the video:

modded one side of the ergodox for comparison - the right hand is fully modded, while only the 2x thumb keys on the left is modded. Note that I am pretty much hammering the buttons, so it is really much louder than it really is when in use.

I didn't want to reduce the travel too much, so I used as little stuffing as I could. There is still some notable difference in travel distance, but as long as I'm not really slamming the keys, the noise from bottoming out is minimal/not noticeable as I don't really bottom out hard while I type.

In fact, the switch resetting itself is louder as I haven't done anything like the latex mod to the tops. I do plan to do it eventually (Oobly's fully modded switch sounds really good), but haven't figured out how to get the latex milk or something similar.

That sounds great!
Title: Re: Cherry MX Trampoline Mod!
Post by: taylordcraig on Tue, 26 November 2013, 00:58:03
http://www.theppb.co.uk/technical.htm

Looks viable for rubber balls. I'm very interested in this mod. I'm typing on whites right now and I like how they feel compared to browns. I still need to try clear and green. I also haven't tried orings yet.

Thinking some balls might make my browns feel better as I type too hard for them and bottom out all the time.
Title: Re: Cherry MX Trampoline Mod!
Post by: jeffgran on Tue, 26 November 2013, 16:25:18
Just wanted to share my experience with this mod:

I tried on 3 or 4 keys using little pieces of o-ring like Oobly did. It feels nice and springy. But, when I put a thick blue o-ring on a different key, I can't really tell the two keys apart. So I don't think it feels any different than the o-ring does.

However, when I had my DSA keycaps on these same switches, there was a big difference. Because of the different depth of the underside of the keycap, the o-ring did much less to dampen and soften the landing than the trampoline did. So I would say the main value of this mod is that the resulting feel is keycap independent. The soft springy landing will be the same no matter which keycaps you put on. It also means that if/when you change keycaps, you don't have to transfer the o-ring from the old keycap to the new one. It is much more effort up front though, since you have to take apart the switch to do it.
Title: Re: Cherry MX Trampoline Mod!
Post by: Pacifist on Tue, 26 November 2013, 16:33:50
Just wanted to share my experience with this mod:

I tried on 3 or 4 keys using little pieces of o-ring like Oobly did. It feels nice and springy. But, when I put a thick blue o-ring on a different key, I can't really tell the two keys apart. So I don't think it feels any different than the o-ring does.

However, when I had my DSA keycaps on these same switches, there was a big difference. Because of the different depth of the underside of the keycap, the o-ring did much less to dampen and soften the landing than the trampoline did. So I would say the main value of this mod is that the resulting feel is keycap independent. The soft springy landing will be the same no matter which keycaps you put on. It also means that if/when you change keycaps, you don't have to transfer the o-ring from the old keycap to the new one. It is much more effort up front though, since you have to take apart the switch to do it.

But when you open it up, you might as well lube the switch and sticker it  ;)
Title: Re: Cherry MX Trampoline Mod!
Post by: taylordcraig on Tue, 26 November 2013, 18:16:54
http://www.theppb.co.uk/technical.htm

Looks viable for rubber balls. I'm very interested in this mod. I'm typing on whites right now and I like how they feel compared to browns. I still need to try clear and green. I also haven't tried orings yet.

Thinking some balls might make my browns feel better as I type too hard for them and bottom out all the time.

Contacted them. Here is what I heard back.

Cellulose Acetate balls have a hardness
of around 73 Rockwell R.
We have some samples if you need to "feel" them!

1.5mm Cellulose Acetate x 250 @ £16.00/100, ex works
2mm Cellulose Acetate x 250 @ £17.00/100, ex works

The only rubber we stock in tiny sizes is Nitrile (70A) in 3/32" (2.38mm)

3/32" Nitrile x 250 @ £38.00/100, ex works

kind regards
Jan Garth
THE PRECISION PLASTIC BALL CO LTD
Title: Re: Cherry MX Trampoline Mod!
Post by: Larken on Tue, 26 November 2013, 22:41:59
Just wanted to share my experience with this mod:

I tried on 3 or 4 keys using little pieces of o-ring like Oobly did. It feels nice and springy. But, when I put a thick blue o-ring on a different key, I can't really tell the two keys apart. So I don't think it feels any different than the o-ring does.

However, when I had my DSA keycaps on these same switches, there was a big difference. Because of the different depth of the underside of the keycap, the o-ring did much less to dampen and soften the landing than the trampoline did. So I would say the main value of this mod is that the resulting feel is keycap independent. The soft springy landing will be the same no matter which keycaps you put on. It also means that if/when you change keycaps, you don't have to transfer the o-ring from the old keycap to the new one. It is much more effort up front though, since you have to take apart the switch to do it.

I had the same experience when I used rubber pieces in the mod too - that it felt no different from using o-rings under keycaps.  I didn't really like it; the key feel was changed too much for my tastes, and a little too mushy.

I wanted silencing of the bottom out with minimal change in feel of the key, which was why I went with punched beads from a pvc mat. As the material is pretty much sponge, once compressed, it only reverts to a certain extent, which had the desired effect I wanted from the mod. The filling up of the empty space inside the stem, and a week of typing have 'seasoned' the beads enough that I think the reduction of the travel is probably between 0.2mm to 0.5mm at max (it's really hard to tell at this point) - while retaining the silent bottom out for the 1x keys. In other words, it got closer to the original key feel without the mod, while remaining the most of the muting effect.

But it is not without failure though - the 2x keys have become much louder than it was when I first completed the mod; while still quieter when compared to unmodded switches, it definitely can't be described as totally silent in use.



http://www.theppb.co.uk/technical.htm

Looks viable for rubber balls. I'm very interested in this mod. I'm typing on whites right now and I like how they feel compared to browns. I still need to try clear and green. I also haven't tried orings yet.

Thinking some balls might make my browns feel better as I type too hard for them and bottom out all the time.

Contacted them. Here is what I heard back.

Cellulose Acetate balls have a hardness
of around 73 Rockwell R.
We have some samples if you need to "feel" them!

1.5mm Cellulose Acetate x 250 @ £16.00/100, ex works
2mm Cellulose Acetate x 250 @ £17.00/100, ex works

The only rubber we stock in tiny sizes is Nitrile (70A) in 3/32" (2.38mm)

3/32" Nitrile x 250 @ £38.00/100, ex works

kind regards
Jan Garth
THE PRECISION PLASTIC BALL CO LTD

Out of those options, it is likely that the 1.5mm is the only one that could fit into the stem hole, though I wonder how hard is 73 rockwell r.

Title: Re: Cherry MX Trampoline Mod!
Post by: korrelate on Wed, 27 November 2013, 01:03:44
So I'm pretty sure that Precision Plastics was using two different hardness scales but they only declared the one: Rockwell (and gave a value of 73R as the hardness of the Cellulose Acetate). The other scale (I think... totally not sure but it's a somewhat informed guess) is the Durometer and they used it to describe the hardness of the Nitrile rubber balls (as 70A).

Now check this out: the Cherry O-ring silencers that WASDKeyboards sells? They come in two flavors: Red and Blue both have a hardness rating of 40A (and I believe that this is on the durometer scale as well because these O-rings are also a type of rubber: EPDM vs Nitrile above).

WASD keyboards used to carry another flavor: black, and they were much harder (70A if I remember). But I digress... I mentioned the above because these silencer rings are pretty common and if you have them you have a perfect example of what 40A feels like. If you have an old sampler pack that includes the Black Rings then you know what 70A feels like.

But the question is, what do those cellulose acetate balls (73R) feel like? Based on a quick visual inspection of the diagram at the bottom of the link below... I'm thinking that they would be (if it even makes sense because I don't know what the range is of the durometer "function") around 105-100A.

http://www.calce.umd.edu/TSFA/Hardness_ad_.htm
Note this is the only link I found that converted Durometer A to Rockwell R: most of them only go from Durometer D to Rockwell R. YMMV.

I had a hard time getting my head around an example of what 73R feels like until I noticed that 73R is the hardness of polypropylene and we all know what that feels like: that's what the lid of a pack of Tic-Tacs is made out of (I didn't know that until I looked up PP). Not super hard but not incredibly pliable either. And the concern I have about this material is this: if you drop it in the barrel of the switch will it snug itself into the bottom, snugly so that it doesn't pop out? Sounds like an interesting theory to test though.

http://en.wikipedia.org/wiki/Polypropylene


Here's another idea: use that belt-hole punch on one of those nitrile balls... If you use too small a ball in the punch maybe the punch would just push the ball right through... maybe you need to go with a bigger ball and then just slice them up.

One thing I noticed with the blue, red and black O-rings when I tried them on my board: they all made my board feel too sluggish (even the 70A black ones). It's tempting to think that 105A is too hard... but sometimes I think that might be just about perfect. In any event, I wouldn't be too eager to dismiss any material with a hardness <= 110A until its "feel" was tested. And I think the only way that hardnesses around 110A are going to work properly is when they get punched to precisely the right diameter (so that they really seat themselves in there).


Cheers,

I never would have thought that this thread be running as long as it has. Sorry I don't have the time to contribute anything more material to the conversation but I hope this helps!

-K
Title: Re: Cherry MX Trampoline Mod!
Post by: jeffgran on Wed, 27 November 2013, 01:52:11
I ordered these (http://www.amazon.com/gp/product/B00137WRFU) to see if they'd fit in there. 3/32 inches seems to be the smallest common size for these little rubber balls, which is about 2.3mm. I forget who but someone measured the little hole at 2mm, but since it's pliable rubber I bet you can just cram it in there. And I believe someone else measured that there's about 0.8mm of empty space at the bottom of an unmodified switch, so that means this would reduce the travel by about 1.5mm -- 0.5mm after the activation point on most switches. Not sure that will be a good thing but hey, it's for keyboard science. :)
Title: Re: Cherry MX Trampoline Mod!
Post by: taylordcraig on Wed, 27 November 2013, 17:02:34
I might pick up 250 of 1.5mm acetate balls. Waiting on my next pay cheque for my purchase dust to settle.
Title: Re: Cherry MX Trampoline Mod!
Post by: Pacifist on Wed, 27 November 2013, 17:07:09
How are these so expensive? They're 12 cents more than the switch...
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Fri, 29 November 2013, 04:42:46
I have managed to stuff a 2.5mm piece of rubber into the tube. It felt a bit too hard for my liking. I like the softer feel of an oring piece or smaller rubber piece.

I'm not convinced the balls are a good option unless we find one that's just the perfect size and material (and affordable). Can't really adjust much.

The advantages of this mod are:

1. Keycap independent. Can use any caps you like and never have to fiddle with orings again.

2. Can customise the feeling by changing material, thickness and length of the inserted piece. Can even just shorten the key movement by using hard plastic.

I have been given some 2mm thick rubber mats which I am testing for this mod (They seem to be different hardnesses of some type of silicon). I use a 2mm leather hole punch to make little "beads". The punch doesn't make perfect cylinders, but rather something like an hourglass shape. They feel very similar to the oring pieces so far and are very consistent. I will take some time on the weekend to try the different mats.

Comparing to videos on the interwebs, my board sounds a lot like a silenced Topre now. Can't say about the feel until I try a Topre side by side.

I have put POM caps on some of the keys and I prefer it to the PBT. Gives a deeper tone. Really quality feeling.
(http://static1.fjcdn.com/thumbnails/comments/The+second+time+today+I+ve+seen+a+gif+I+made+_c26776830e793dea63a0b18bf4c59aa8.gif)
Title: Re: Cherry MX Trampoline Mod!
Post by: SpAmRaY on Fri, 29 November 2013, 04:46:10
Interesting experiments! Keep up the good work.
Title: Re: Cherry MX Trampoline Mod!
Post by: Stevenator21 on Sun, 15 December 2013, 18:47:52
Will the latex ever wear out or will the feeling be consistant over a long period of time?
Awesome mod by the way!
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Fri, 27 December 2013, 01:37:34
Will the latex ever wear out or will the feeling be consistant over a long period of time?
Awesome mod by the way!

I honestly don't know. It's still going strong after a month and a half, though, and still feels the same to me. I was worried about the latex peeling away from the top casing, but it hasn't happened with my switches so far.

Thank you!
Title: Re: Cherry MX Trampoline Mod!
Post by: Pacifist on Sat, 04 January 2014, 21:29:03
how much of it do I need for 30 switches?
Title: Re: Cherry MX Trampoline Mod!
Post by: riotonthebay on Sat, 04 January 2014, 21:40:27
how much of it do I need for 30 switches?

Multiply the amount in this image by thirty:

(http://geekhack.org/index.php?action=dlattach;topic=50632.0;attach=43437;image)

If it comes out to anything other than "the smallest amount I can buy," you're probably doing the math wrong ;).
Title: Re: Cherry MX Trampoline Mod!
Post by: Pacifist on Sat, 04 January 2014, 21:41:42
got any measurements?
Title: Re: Cherry MX Trampoline Mod!
Post by: riotonthebay on Sat, 04 January 2014, 21:45:29
got any measurements?

I'm very confused. How are you planning to get the stuff? Does this level of precision actually matter?
Title: Re: Cherry MX Trampoline Mod!
Post by: Pacifist on Sat, 04 January 2014, 21:46:15
Don't want to overbuy, just want a small bottle. And if this takes a lot (like layering) then i don't want to buy too little
Title: Re: Cherry MX Trampoline Mod!
Post by: riotonthebay on Sat, 04 January 2014, 21:49:36
Don't want to overbuy, just want a small bottle. And if this takes a lot (like layering) then i don't want to buy too little

The two small white dollops seen in the picture are all you need for each switch. Switches aren't big to begin with, and the surface area you're covering per switch is incredibly small. I'd say that you're fine unless you're buying it in a thimble, but even thimble's worth would be way too much.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Mon, 06 January 2014, 05:29:47
As riotonthebay says, you really don't need much. I put just a drop each side and let it dry, no extra layers. I think 5ml would do a whole keyboard and have some left over. I used a toothpick for applying it.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Fri, 17 January 2014, 07:04:57
Just thought of a new take on this mod inspired by redskull's project to increase the weight of 45g Topres by using stronger springs.

If we use miniature springs in the hole under the stem, we can have dual rate MX switches. Softer until activation, then harder. The uncompressed length needs to be roughly 2.8mm for non-clicky switches, and compressed (solid) length of around 0.8mm. Outer diameter about 2mm. I have found some little springs which may work, but they're too expensive ($1.58 each when buying 100-199).

I may just try it with a homemade spring to see.

I am happy with my board already, but I like experimenting, so I'll try with a couple individual switches and maybe someone else can benefit if they like how it feels.

It could help prevent bottoming out while retaining the normal switch feel until activation. Maybe more like a trampoline than the rubber piece :D
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Fri, 17 January 2014, 12:32:58
Just thought of a new take on this mod inspired by redskull's project to increase the weight of 45g Topres by using stronger springs.

If we use miniature springs in the hole under the stem, we can have dual rate MX switches. Softer until activation, then harder. The uncompressed length needs to be roughly 2.8mm for non-clicky switches, and compressed (solid) length of around 0.8mm. Outer diameter about 2mm. I have found some little springs which may work, but they're too expensive ($1.58 each when buying 100-199).

I may just try it with a homemade spring to see.

I am happy with my board already, but I like experimenting, so I'll try with a couple individual switches and maybe someone else can benefit if they like how it feels.

It could help prevent bottoming out while retaining the normal switch feel until activation. Maybe more like a trampoline than the rubber piece :D

ya, an interesting approach.  The main problem you may face is if the spring is too big, it will jam up the stem and not move at all because of the taper at the bottom of the stem (causing a wedge effect).  If the spring is too small it will likely turn and not act as a spring anymore.  getting the exact size spring that is big enough to not change orientation, but small enough to not block the stem from moving will be a bit tricky, but if it works, its a great idea.  :)
Title: Re: Cherry MX Trampoline Mod!
Post by: tlem on Fri, 07 February 2014, 13:38:54
What if you use the latex milk to dampen the downward strike?  I guess you would apply it to the bottom of the stem's sliders.
Title: Re: Cherry MX Trampoline Mod!
Post by: riotonthebay on Fri, 07 February 2014, 13:40:52
What if you use the latex milk to dampen the downward strike?  I guess you would apply it to the bottom of the stem's sliders.

The switch stops when the stem's shaft hits the bottom. What you're suggesting is what the trampoline mod accomplishes; I don't think latex milk would hold up over time.
Title: Re: Cherry MX Trampoline Mod!
Post by: piglickjf on Fri, 07 February 2014, 19:28:34
What if you use the latex milk to dampen the downward strike?  I guess you would apply it to the bottom of the stem's sliders.

The switch stops when the stem's shaft hits the bottom. What you're suggesting is what the trampoline mod accomplishes; I don't think latex milk would hold up over time.

I thought it was shown on that (Korean?) website and discussed further here that the shaft doesn't bottom out?

I would think rather than applying it to the bottom of the stem's sliders, however, that it would be better to apply it to the switch base, at the bottom of the sliders. It just seems like over time, the latex could dislodge itself and fall off if it's applied to the bottom of a surface (ie the latex is "hanging"), whereas if it's applied to the top it's more likely to stay in place (no gravity constantly trying to pull it off).
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Tue, 11 February 2014, 06:34:06
"Clicky" switch sliders hit the bottom of the tube, but with non-clicky switches (Browns, Clears, Reds, Blacks, etc) the side pieces of the slider hit the bottom case and the rod stops about 0.8mm from the bottom of the tube.

If you latex mod the bottom of the slider or top surface of the bottom of the case it will feel different to using a rubber piece in the tube (due to the difference in surface area and the 0.8mm gap in the tube). It will only damp the force a little bit unless you put a few layers on. Rubber piece in the tube will generally be softer and can be more consistent I would think (cutting same length pieces vs trying to get the same thickness layer of latex).

Matias has approached the problem in an interesting way. They use a little piece of rubber that fits on the slider and protrudes both above and below it, so the rubber piece hits when bottoming out AND releasing the switch.

Thinking about the springs version of the mod, it wouldn't dampen as nicely as rubber does, but would help to learn not to bottom out by progressively increasing the force after actuation. May suit some more. And yes, it's hard to make a spring the right size that maintains its position and orientation.
Title: Re: Cherry MX Trampoline Mod!
Post by: jacobolus on Tue, 11 February 2014, 19:14:50
Matias has approached the problem in an interesting way. They use a little piece of rubber that fits on the slider and protrudes both above and below it, so the rubber piece hits when bottoming out AND releasing the switch.
Note: Alps dampened cream/white switches also did this. E.g. the Apple Extended Keyboard II have such dampened switches. They have the same little rubber piece in the slider that hit the plastic at the bottom/top of the switch housing, eliminating much of the noise, that the new Matias switches have.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Wed, 12 February 2014, 06:28:46
Thanks for the info on the Alps switches. Interesting.

Something important to the feel of this mod is the width of the piece you insert into the hole. If it is compressed until it fills the space, it'll stop dead at that point unless the material you use has some air spaces (foam). The hourglass shape and curved oring pieces leave a decent amount of "squish" area and both seem to work well (to my taste). A full 2mm diameter disc with vertical walls will feel quite different and won't compress much at all irrespective of the material (assuming a "solid" material like silicone, not foam), but would still provide some damping effect.

Neoprene rubber foam may provide a whole different feeling again, by being able to compress more, it may be more progressive.

There really are a lot of options with this for fine tuning the feel.

Sorbothane or some other really soft gel-like substance would probably do a better job than the latex mod on the switch tops, but I don't really know how we'd attach it.

Not sure I'll find time to play more with these options, but I thought I'd mention them in case there are some other adventurous souls out there who want to try.
Title: Re: Cherry MX Trampoline Mod!
Post by: lwls on Sat, 15 February 2014, 15:44:36
Thanks for the info on the Alps switches. Interesting.

Something important to the feel of this mod is the width of the piece you insert into the hole. If it is compressed until it fills the space, it'll stop dead at that point unless the material you use has some air spaces (foam). The hourglass shape and curved oring pieces leave a decent amount of "squish" area and both seem to work well (to my taste). A full 2mm diameter disc with vertical walls will feel quite different and won't compress much at all irrespective of the material (assuming a "solid" material like silicone, not foam), but would still provide some damping effect.

Neoprene rubber foam may provide a whole different feeling again, by being able to compress more, it may be more progressive.

There really are a lot of options with this for fine tuning the feel.

Sorbothane or some other really soft gel-like substance would probably do a better job than the latex mod on the switch tops, but I don't really know how we'd attach it.

Not sure I'll find time to play more with these options, but I thought I'd mention them in case there are some other adventurous souls out there who want to try.

Ever thought about putting some of that latex milk in the hole?
Would be hard to remove if you change your mind though...
Title: Re: Cherry MX Trampoline Mod!
Post by: piglickjf on Tue, 18 February 2014, 12:56:22
Ever thought about putting some of that latex milk in the hole?
Would be hard to remove if you change your mind though...

Would also be pretty hard to be consistent. Unless you have access to a micropipette I'd think it would be pretty tough to get the same amount down into each hole. Even then I wouldn't be surprised if you wound up with some developing bubbles/air gaps, etc. so that the level of the top of latex, when dried, varies from switch to switch, although I haven't worked with the latex milk so I'm not really sure about its viscosity/surface tension, etc.

PigLick
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Wed, 19 February 2014, 04:10:40
Ever thought about putting some of that latex milk in the hole?
Would be hard to remove if you change your mind though...

Would also be pretty hard to be consistent. Unless you have access to a micropipette I'd think it would be pretty tough to get the same amount down into each hole. Even then I wouldn't be surprised if you wound up with some developing bubbles/air gaps, etc. so that the level of the top of latex, when dried, varies from switch to switch, although I haven't worked with the latex milk so I'm not really sure about its viscosity/surface tension, etc.

PigLick

Plus, as it dries it shrinks (a lot actually), so you'd get a sort of cup shaped bit in the hole and the sides would most likely peel away as it dries. I don't think it's a good solution.

You could try putting a little on the bottom of the pole of a Blue slider, though. Would provide just a little damping when bottoming out.
Title: Re: Cherry MX Trampoline Mod!
Post by: piglickjf on Fri, 21 February 2014, 10:00:14
Ever thought about putting some of that latex milk in the hole?
Would be hard to remove if you change your mind though...

Would also be pretty hard to be consistent. Unless you have access to a micropipette I'd think it would be pretty tough to get the same amount down into each hole. Even then I wouldn't be surprised if you wound up with some developing bubbles/air gaps, etc. so that the level of the top of latex, when dried, varies from switch to switch, although I haven't worked with the latex milk so I'm not really sure about its viscosity/surface tension, etc.

PigLick

Plus, as it dries it shrinks (a lot actually), so you'd get a sort of cup shaped bit in the hole and the sides would most likely peel away as it dries. I don't think it's a good solution.

You could try putting a little on the bottom of the pole of a Blue slider, though. Would provide just a little damping when bottoming out.

But how adherent is the stuff? It seems like with such a small surface area, the constant pull of gravity combined with repeated impacts with the bottom of the housing would cause it to fall off before too long, wouldn't it? Or does it make a pretty solid bond with the plastic?
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Mon, 24 February 2014, 03:21:31
It's still working fine at the top of my switch casings, hasn't come off on any switch yet.

In terms of durability, it may be better to put a tiny bit on top of each side of the slider where it impacts the case, but I think it helps absorb more of the sound and vibration when it's on the case.

It may be possible to do the latex mod on closed switches (without keycaps) if you hold the slider down with something and apply the latex to the top of the slider on each side. Be sure to clean the area you apply latex to with a cotton bud / earbud / Q-Tip so it makes better contact.

I'm sure either way will work and should be durable enough.

I have discovered that some cheap cigarette lighters have about the right size spring to fit inside the tube (the one that pushes the flint against the roller thing)..... It's a curse having such strong curiosity. An interesting thing to note is that the tiny spring may fit around the bottom part of a Blue or Green stem shaft (the extra section they have that isn't there on Red or Brown stems) and only act against the angled section, so it could have the same feeling as on Brown or Red switches. You'd probably have to sacrifice quite a lot of lighters to outfit a whole board, though.
Title: Re: Cherry MX Trampoline Mod!
Post by: Pacifist on Tue, 18 March 2014, 20:35:21
ummmmmmmmmmmmmm

http://imsto.cn/index.php?route=product/product&manufacturer_id=13&product_id=88

looks like imsto took your idea
Title: Re: Cherry MX Trampoline Mod!
Post by: SpAmRaY on Wed, 19 March 2014, 07:15:27
ummmmmmmmmmmmmm

http://imsto.cn/index.php?route=product/product&manufacturer_id=13&product_id=88

looks like imsto took your idea

^^ haha....I was just about to post that here :P
Title: Re: Cherry MX Trampoline Mod!
Post by: nubbinator on Wed, 19 March 2014, 09:04:45
ummmmmmmmmmmmmm

http://imsto.cn/index.php?route=product/product&manufacturer_id=13&product_id=88

looks like imsto took your idea

Except silica gel is hard, not soft.  I can't imagine it giving a pleasant feel.  And I know some silica gels can break once they've absorbed enough water.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Wed, 19 March 2014, 11:12:31
Haha! Very interesting. I believe they are silicon rubber, not silica gel, from what I can see in the photos.

Turns out the lighter spring was just a hair too large OD, so it bound to the tube and didn't really work.. Anyway, I like the "hourglass" pieces cut from silicon rubber sheet with the leather punch the most. They are consistent and pretty easy to make for a whole board.

I may have to buy some of those balls to try out. I suspect they will have a little less "give" than the hourglass shaped pieces, but should work very well. The price is decent, too.
Title: Re: Cherry MX Trampoline Mod!
Post by: epzy on Thu, 20 March 2014, 20:42:37
Hey, Oobly - could you make a typing video with one of your keyboards w/ the trampoline mod?
Title: Re: Cherry MX Trampoline Mod!
Post by: mkawa on Sat, 22 March 2014, 18:41:26
Haha! Very interesting. I believe they are silicon rubber, not silica gel, from what I can see in the photos.

Turns out the lighter spring was just a hair too large OD, so it bound to the tube and didn't really work.. Anyway, I like the "hourglass" pieces cut from silicon rubber sheet with the leather punch the most. They are consistent and pretty easy to make for a whole board.

I may have to buy some of those balls to try out. I suspect they will have a little less "give" than the hourglass shaped pieces, but should work very well. The price is decent, too.
they're almost certainly little silicone balls, but they do look exactly like silica dessicant balls. hah! i can see how imsto could get the two compounds confused trying to translate the material name. i'll shoot him a quick correction ;)
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Mon, 24 March 2014, 04:00:47
Hey, Oobly - could you make a typing video with one of your keyboards w/ the trampoline mod?

I made this video while doing the mod:

But I don't have an actual typing video.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Fri, 09 May 2014, 13:07:25
Having been made aware that there could be longevity issues with using liquid latex (in this thread: http://geekhack.org/index.php?topic=57881.0 ), I remembered that there are some synthetic liquid rubbers available which could possibly do the job and may even be easier to get hold of, too.

This stuff could be a good product to use instead of latex: http://www.plastidip.com/home_solutions/Plasti_Dip
Title: Re: Cherry MX Trampoline Mod!
Post by: AGmurdercore on Sat, 10 May 2014, 04:11:48
ummmmmmmmmmmmmm

http://imsto.cn/index.php?route=product/product&manufacturer_id=13&product_id=88

looks like imsto took your idea
Too bad that the shipping for these is so much :( (10$ for me)

I was that i lived in a place where i could get more and split the shipping around :D
Title: Re: Cherry MX Trampoline Mod!
Post by: Canut on Tue, 13 May 2014, 00:28:08
Not sure whether this helps: How about cutting lengths from a long rubber cord rather than chopping up circular O-rings?
Google gives numerous hits for stretchy elastic cord (used to make necklaces, etc). But we need something that works in compression rather than tension.

Apparentl,y O-ring material comes in cord form.
Radio Shack (UK):
"RS Nitrile Rubber O-Ring Cord, 2mm Diam. , 8.5m Long"
http://uk.rs-online.com/web/p/o-ring-cords/6830765/

Not sure whether there are any hardness options out there, but 8500 mm for ~8.5 British pounds would do a lot of switches. And one might rig-up a "bacon slicer / craft knife" type thing to quickly feed through the cord and cut lots of pieces to the same length.
Title: Re: Cherry MX Trampoline Mod!
Post by: Melvang on Tue, 13 May 2014, 01:14:35
What about trimming the bottom of the stem a bit and putting a small magnet at the bottom of the housing and one at the bottom of the stem?
Title: Re: Cherry MX Trampoline Mod!
Post by: n0rvig on Tue, 13 May 2014, 02:15:15
What about trimming the bottom of the stem a bit and putting a small magnet at the bottom of the housing and one at the bottom of the stem?

Mag-lev switches?! Hell yeah!
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Tue, 13 May 2014, 02:56:31
Not sure whether this helps: How about cutting lengths from a long rubber cord rather than chopping up circular O-rings?
Google gives numerous hits for stretchy elastic cord (used to make necklaces, etc). But we need something that works in compression rather than tension.

Apparentl,y O-ring material comes in cord form.
Radio Shack (UK):
"RS Nitrile Rubber O-Ring Cord, 2mm Diam. , 8.5m Long"
http://uk.rs-online.com/web/p/o-ring-cords/6830765/

Not sure whether there are any hardness options out there, but 8500 mm for ~8.5 British pounds would do a lot of switches. And one might rig-up a "bacon slicer / craft knife" type thing to quickly feed through the cord and cut lots of pieces to the same length.

That's a good option. I just used what I had to hand, and I suspect a lot of keyboard modders out there already have orings, so it's easy to test with pieces of those. If you do get some cord, it should be slightly smaller diameter than the hole (which is 2mm) since it needs some "squish" area to expand into when compressed. If you fill the diameter of the tube, then it will make for quite a hard bottoming out, since the rubber piece cannot compress much without the chance to deform.

Each shape actually feels a little different. The balls use up their "squish" space fairly quickly, whereas the hourglass shapes and curved oring pieces have a bit more room to deform into and provide a more progressive increase in force. It's quite subtle, but it's noticeable.

I think 1.5mm cord of the right durometer would do the job beautifully! It is very hard to cut orings consistently into the same size pieces.

What about trimming the bottom of the stem a bit and putting a small magnet at the bottom of the housing and one at the bottom of the stem?

While that will provide extra cushioning as you get closer to then end of the switch travel, it may not prevent bottoming out or the sound of bottoming out unless you use really strong magnets. It's an interesting idea, though, particularly because you can adjust the force profile by changing magnet and spring strengths. Springs have a constant rate of force increase, whereas magnets have a parabolic increase.

If anyone tries this, please give us feedback! You may even be able to do away with the spring entirely with strong enough magnets and linear stems.
Title: Re: Cherry MX Trampoline Mod!
Post by: Melvang on Tue, 13 May 2014, 09:35:47
Not sure whether this helps: How about cutting lengths from a long rubber cord rather than chopping up circular O-rings?
Google gives numerous hits for stretchy elastic cord (used to make necklaces, etc). But we need something that works in compression rather than tension.

Apparentl,y O-ring material comes in cord form.
Radio Shack (UK):
"RS Nitrile Rubber O-Ring Cord, 2mm Diam. , 8.5m Long"
http://uk.rs-online.com/web/p/o-ring-cords/6830765/

Not sure whether there are any hardness options out there, but 8500 mm for ~8.5 British pounds would do a lot of switches. And one might rig-up a "bacon slicer / craft knife" type thing to quickly feed through the cord and cut lots of pieces to the same length.

That's a good option. I just used what I had to hand, and I suspect a lot of keyboard modders out there already have orings, so it's easy to test with pieces of those. If you do get some cord, it should be slightly smaller diameter than the hole (which is 2mm) since it needs some "squish" area to expand into when compressed. If you fill the diameter of the tube, then it will make for quite a hard bottoming out, since the rubber piece cannot compress much without the chance to deform.

Each shape actually feels a little different. The balls use up their "squish" space fairly quickly, whereas the hourglass shapes and curved oring pieces have a bit more room to deform into and provide a more progressive increase in force. It's quite subtle, but it's noticeable.

I think 1.5mm cord of the right durometer would do the job beautifully! It is very hard to cut orings consistently into the same size pieces.

What about trimming the bottom of the stem a bit and putting a small magnet at the bottom of the housing and one at the bottom of the stem?

While that will provide extra cushioning as you get closer to then end of the switch travel, it may not prevent bottoming out or the sound of bottoming out unless you use really strong magnets. It's an interesting idea, though, particularly because you can adjust the force profile by changing magnet and spring strengths. Springs have a constant rate of force increase, whereas magnets have a parabolic increase.

If anyone tries this, please give us feedback! You may even be able to do away with the spring entirely with strong enough magnets and linear stems.

That is what I am actually looking for.  While you can get a parabolic increase in spring rate with traditional springs, I would be willing to bet these would be pretty expensive at the size we are looking for.  They have been used in mountain biking shocks for a while know.  But those springs are in the multiple hundred pounds of spring rates.  I was thinking of using n52 grade neodymium magnets.  At this size they can be had for surprisingly cheap.
Title: Re: Cherry MX Trampoline Mod!
Post by: strict on Tue, 13 May 2014, 10:19:06
Having been made aware that there could be longevity issues with using liquid latex (in this thread: http://geekhack.org/index.php?topic=57881.0 ), I remembered that there are some synthetic liquid rubbers available which could possibly do the job and may even be easier to get hold of, too.

This stuff could be a good product to use instead of latex: http://www.plastidip.com/home_solutions/Plasti_Dip

Im very interested in quieting down the upstroke clack on my Phantom and was planning on using liquid latex, but PlastiDip is much easier for me to get ahold of. Has anyone tried it yet? If not, I'm willing to be a guinea pig and test it out on a few switches (god knows I've got enough extra switch tops laying around lol).
Title: Re: Cherry MX Trampoline Mod!
Post by: strict on Fri, 16 May 2014, 00:03:28
Having been made aware that there could be longevity issues with using liquid latex (in this thread: http://geekhack.org/index.php?topic=57881.0 ), I remembered that there are some synthetic liquid rubbers available which could possibly do the job and may even be easier to get hold of, too.

This stuff could be a good product to use instead of latex: http://www.plastidip.com/home_solutions/Plasti_Dip

Im very interested in quieting down the upstroke clack on my Phantom and was planning on using liquid latex, but PlastiDip is much easier for me to get ahold of. Has anyone tried it yet? If not, I'm willing to be a guinea pig and test it out on a few switches (god knows I've got enough extra switch tops laying around lol).

So I tested some black plastidip tonight with red switches and was thoroughly unimpressed. Its very hard to apply because it seems to have an appreciable capillary action where it sucks the entire way up the channels for the stem. I tried a few different methods of applying the plastidip and they all had so little affect on the sound so as to be almost imperceptible. I tried a light single coat, thick single coat, light double coat, and a thick double coat. None of it made the switch any quieter. The thick double coat actually made the initial press of the switch feel kind of "gummy". The 4 switch tops I tested with, in my opinion, are now ruined.

Personally I'm going to say PlastiDip is worthless for this purpose but I would welcome others to test and share their results.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Fri, 16 May 2014, 04:49:59
Having been made aware that there could be longevity issues with using liquid latex (in this thread: http://geekhack.org/index.php?topic=57881.0 ), I remembered that there are some synthetic liquid rubbers available which could possibly do the job and may even be easier to get hold of, too.

This stuff could be a good product to use instead of latex: http://www.plastidip.com/home_solutions/Plasti_Dip

Im very interested in quieting down the upstroke clack on my Phantom and was planning on using liquid latex, but PlastiDip is much easier for me to get ahold of. Has anyone tried it yet? If not, I'm willing to be a guinea pig and test it out on a few switches (god knows I've got enough extra switch tops laying around lol).

So I tested some black plastidip tonight with red switches and was thoroughly unimpressed. Its very hard to apply because it seems to have an appreciable capillary action where it sucks the entire way up the channels for the stem. I tried a few different methods of applying the plastidip and they all had so little affect on the sound so as to be almost imperceptible. I tried a light single coat, thick single coat, light double coat, and a thick double coat. None of it made the switch any quieter. The thick double coat actually made the initial press of the switch feel kind of "gummy". The 4 switch tops I tested with, in my opinion, are now ruined.

Personally I'm going to say PlastiDip is worthless for this purpose but I would welcome others to test and share their results.

Darn! That's disappointing. I was going to order some from the UK site, but when I saw the shipping quote to Finland for a little 250ml can I canceled it. I have managed to find a supplier in Finland, so I'll get some. I want to try it on some other projects I have. It appears to cure to a harder end product than the latex. Apparently some people even coat their cars with it!

I have to admit, the latex version of the mod isn't mindblowingly effective. The dampening isn't as effective as the dental band mod on Topre, but it does seem to make a big enough difference to me to be worth it. At least to my ears and for my personal use. I think the video shows quite well the difference between stock and modded. I don't mind having to redo the mod a couple of year down the line if the latex doesn't last, but would definitely prefer a more durable alternative, if just for the peace of mind.
Title: Re: Cherry MX Trampoline Mod!
Post by: davkol on Fri, 16 May 2014, 13:53:43
Umm... it's supposed to be used on cars in the first place AFAIK.
Title: Re: Cherry MX Trampoline Mod!
Post by: n0rvig on Fri, 16 May 2014, 22:12:50
I'll try out this plasti-dip stuff. Maybe it's good for more than cars.
Title: Re: Cherry MX Trampoline Mod!
Post by: Tarzan on Fri, 16 May 2014, 22:50:15
Umm... it's supposed to be used on cars in the first place AFAIK.

Tool handles was the original application.  A replacement for the plastic-dipped handles on pliers, wrenches, etc.  The old-style packaging shows a pair of pliers being dipped in the can to re-coat the handles.
Title: Re: Cherry MX Trampoline Mod!
Post by: Pacifist on Sat, 24 May 2014, 19:19:48
Anybody tried silicon? Or hard foam?
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Mon, 26 May 2014, 03:09:20
Anybody tried silicon? Or hard foam?

On the switch tops? Not yet. If you can find a really thin sheet of self adhesive rubber or rubber foam of any kind, it's worth trying, IMHO. Everyone has different tastes and although I am happy with the latex on my switches, it may not be good enough for others.

I have a feeling I may actually like thick PlastiDip on Browns. It would reduce the travel a bit, perhaps enough to make the tactile bump start at the top of the press, like Clear stems do.

I'm still waiting for my order at IMSTO's shop to be processed..... It's been 11 days.
Title: Re: Cherry MX Trampoline Mod!
Post by: n0rvig on Mon, 26 May 2014, 17:09:42
Anybody tried silicon? Or hard foam?

Not yet, but I'm going to try silicon next. I've tried out plastidip and crazy glue. They worked but I want something softer.
Title: Re: Cherry MX Trampoline Mod!
Post by: Pacifist on Mon, 26 May 2014, 17:17:05
Anybody tried silicon? Or hard foam?

Not yet, but I'm going to try silicon next. I've tried out plastidip and crazy glue. They worked but I want something softer.
try changing the ratios when doing silicon to change hardness
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Thu, 03 July 2014, 05:20:33
My silicone balls from IMSTO have arrived!

[attach=1]

They are 2mm diameter, but not all are perfectly round, some have mold lines around them, but they're fine for this mod.

I tried them in a few loose switches I have and compared them to the oring pieces and punched hourglasses.

They start to have effect at a similar point, but feel different. Initially they are softer than both the oring pieces and hourglasses, but the resistance increases more quickly. They are perfectly acceptable for this mod and I quite like the way they feel. The oring pieces may still be my favourite in terms of feeling, though, despite the slight inconsistency between keys.

I will be using them in my next ergo board prototype and probably any new boards I make / use.

For someone wanting to try out this mod, they're great. Easier than cutting up orings (and more consistent size) or punching holes in a sheet.

Recommended.


I tried putting 2 into a Brown switch just to test and while it was still possible to actuate the switch, the force increased quite markedly before getting to the actuation point, so you lose the tactility of the switch and have to press quite hard to actuate it... Not a good idea.

Title: Re: Cherry MX Trampoline Mod!
Post by: Polymer on Thu, 10 July 2014, 06:27:52
My silicone balls from IMSTO have arrived!

(Attachment Link)

They are 2mm diameter, but not all are perfectly round, some have mold lines around them, but they're fine for this mod.

I tried them in a few loose switches I have and compared them to the oring pieces and punched hourglasses.

They start to have effect at a similar point, but feel different. Initially they are softer than both the oring pieces and hourglasses, but the resistance increases more quickly. They are perfectly acceptable for this mod and I quite like the way they feel. The oring pieces may still be my favourite in terms of feeling, though, despite the slight inconsistency between keys.

I will be using them in my next ergo board prototype and probably any new boards I make / use.

For someone wanting to try out this mod, they're great. Easier than cutting up orings (and more consistent size) or punching holes in a sheet.

Recommended.


I tried putting 2 into a Brown switch just to test and while it was still possible to actuate the switch, the force increased quite markedly before getting to the actuation point, so you lose the tactility of the switch and have to press quite hard to actuate it... Not a good idea.

How much do the balls change the travel?  Does it work with the spacebar w/ Cherry stabilizers?  That tilting point ends up being an issue (same w/ putting just one o-ring....it allows you to pop off the spacebar by pressing on one side).

Seems like a pretty good solution...
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Thu, 10 July 2014, 07:40:32
The travel is reduced very slightly with the balls, I'd say you start to feel it about 1mm from bottom out and you can squish it all the way to actual bottom out if you press hard enough, so in normal use the travel is reduced about half that I reckon, so 0.5mm.

They work great with Cherry stabilisers, they're the only type I use. The tabs on stock stabilisers (unclipped) act at about the same point, so the forces balance quite well and there is no "tilting". Haven't tried on clipped stabs, but I'm certain they'd still work fine unless the spacebar is REALLY loose on the stems.
Title: Re: Cherry MX Trampoline Mod!
Post by: Polymer on Thu, 10 July 2014, 08:54:41
So if you compared them to o-ring travel reduction what would you think?

I do like that o-rings don't change the actual feel of the keys really..but it doesn't sound like it ramps up too too much w/ the balls...but it is always there though...I'd probably prefer these in linear but no way of knowing until I try I guess..
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Thu, 10 July 2014, 08:59:43
In your experience, how does this compare with the silicon balls mod?
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Thu, 10 July 2014, 12:10:43
So if you compared them to o-ring travel reduction what would you think?

I do like that o-rings don't change the actual feel of the keys really..but it doesn't sound like it ramps up too too much w/ the balls...but it is always there though...I'd probably prefer these in linear but no way of knowing until I try I guess..

Depends on the oring and what type of cap it's on. About the same travel reduction as red orings from Amazon.com on Keycool 84 white PBT caps, but feels better, less mushy, more progressive. You can try it with a loose switch to get an idea of how it would feel or just a couple of switches on your board.

In your experience, how does this compare with the silicon balls mod?

Um... I guess this IS the silicone balls mod? You can read this post on how the 3 versions of the mod compare to each other: http://geekhack.org/index.php?topic=50632.msg1386120#msg1386120

Title: Re: Cherry MX Trampoline Mod!
Post by: n0rvig on Thu, 10 July 2014, 15:29:24
So if you compared them to o-ring travel reduction what would you think?

I do like that o-rings don't change the actual feel of the keys really..but it doesn't sound like it ramps up too too much w/ the balls...but it is always there though...I'd probably prefer these in linear but no way of knowing until I try I guess..

Depends on the oring and what type of cap it's on. About the same travel reduction as red orings from Amazon.com on Keycool 84 white PBT caps, but feels better, less mushy, more progressive. You can try it with a loose switch to get an idea of how it would feel or just a couple of switches on your board.

I agree that they feel less mushy than o-rings. For comparison I've tried both the harder WASD o-rings and IMSTO red silicon. However, these balls affect the travel too much for me. I still love the idea. I guess I prefer to have as much travel as possible.
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Thu, 10 July 2014, 16:14:26
So if you compared them to o-ring travel reduction what would you think?

I do like that o-rings don't change the actual feel of the keys really..but it doesn't sound like it ramps up too too much w/ the balls...but it is always there though...I'd probably prefer these in linear but no way of knowing until I try I guess..

Depends on the oring and what type of cap it's on. About the same travel reduction as red orings from Amazon.com on Keycool 84 white PBT caps, but feels better, less mushy, more progressive. You can try it with a loose switch to get an idea of how it would feel or just a couple of switches on your board.

In your experience, how does this compare with the silicon balls mod?

Um... I guess this IS the silicone balls mod? You can read this post on how the 3 versions of the mod compare to each other: http://geekhack.org/index.php?topic=50632.msg1386120#msg1386120 (http://geekhack.org/index.php?topic=50632.msg1386120#msg1386120)

Very informative, thank you.
Title: Re: Cherry MX Trampoline Mod!
Post by: deltuhhh on Thu, 10 July 2014, 19:53:21
I never really did like how o-rings felt so this could be an alternative.
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Sat, 12 July 2014, 21:08:36
I just got SA caps (which are great), but I do miss the orings I had on my cherrys. SA do not appear to be oring mod able, so I think this is my best bet. I actually feel (with oring testing) that a travel reduction of 0.5mm is perfect, so that's awesome.

Can you post the link to what you bought? Thx.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Mon, 14 July 2014, 04:44:04
I just got SA caps (which are great), but I do miss the orings I had on my cherrys. SA do not appear to be oring mod able, so I think this is my best bet. I actually feel (with oring testing) that a travel reduction of 0.5mm is perfect, so that's awesome.

Can you post the link to what you bought? Thx.

No problem, here you go: http://imsto.cn/index.php?route=product/product&path=61&product_id=88

Really good price, IMO, 3$ for about 200 balls.
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Mon, 14 July 2014, 07:40:54
I just got SA caps (which are great), but I do miss the orings I had on my cherrys. SA do not appear to be oring mod able, so I think this is my best bet. I actually feel (with oring testing) that a travel reduction of 0.5mm is perfect, so that's awesome.

Can you post the link to what you bought? Thx.

No problem, here you go: http://imsto.cn/index.php?route=product/product&path=61&product_id=88

Really good price, IMO, 3$ for about 200 balls.

Great. Thx. Ordered.
Title: Re: Cherry MX Trampoline Mod!
Post by: KHAANNN on Thu, 12 March 2015, 04:08:52
I only tested the trampoline mod on sample switches, yet on my limited trials, I experienced an o-ring/stem/pole jam, it's a micro-jam, it feels mostly like mushiness

On a full board that gets pressed a lot, it seems to me that this micro-jam might be an issue, have anyone used the trampoline-mod for prolonged times, more importantly, have anyone tested silicone balls for a long time?

These silicone balls seem like a much much better idea, but as I haven't ordered them yet, I have no idea how they compare or whether they are able to jam too or not, but unless one has the ability to glue these pieces into the pole, I guess silicone balls should be better than the o-rings

(How is the ordering experience from imsto.cn?)
(offtopic, It's also possible to stack multiple o-rings with D/SA keycaps, I've been using my keycaps with double o-rings, no issues up until now, but the trampoline mod is obviously superior, if it works consistently)
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Thu, 12 March 2015, 09:27:19
I've never had a "jam". Was the piece pushed down right to the bottom properly before inserting the stem? If they're on clicky switches it could be due to having to use a thinner piece that's not settled properly flat to the bottom of the tube (it should stay in place at the bottom and not lift with the slider pole) and gets partially between the slider pole and tube sides. I don't use clicky switches, so I can't really test this. The balls may be a little too tall for clicky sliders so you may have to cut them in half (or trim the slider pole ends) to get a similar feeling to whole balls in tactile / linear switches.

I've been using oring piece trampolines for about 15 months and IMSTO silicone balls for about 9 months or so. No change in feel that I can tell.

I found ordering from IMSTO to be fine. It took a while to get an update on my order and I had no answer to my PM, but the items I ordered arrived without a problem and well packaged.

You can stack multiple orings, but it takes some playing around to find the right number / type to get the feel similar between rows on sculptured SA.
Title: Re: Cherry MX Trampoline Mod!
Post by: KHAANNN on Thu, 12 March 2015, 11:16:26
I might also be using very thin o-ring pieces, the pieces I cut are probably around a millimeter

I'm also thinking of inserting some glue into the pole with a syringe and inserting the o-ring piece inside to be glued in place, but it's probably an unnecessary addition, it's also hard to find a glue that's optimal for the job
Title: Re: Cherry MX Trampoline Mod!
Post by: neverused on Thu, 12 March 2015, 11:51:47
The arc length of a cut ring may influence behavior, allowing the inherent curve to introduce deflection within the recess.
Title: Re: Cherry MX Trampoline Mod!
Post by: E3E on Mon, 06 July 2015, 14:58:36
I apologize for necroing this thread, but are the silicone balls removable once placed? I would imagine that they are not.
Title: Re: Cherry MX Trampoline Mod!
Post by: KHAANNN on Mon, 06 July 2015, 15:27:07
I apologize for necroing this thread, but are the silicone balls removable once placed? I would imagine that they are not.

99% they should be, unless you are living in 45C and they sort of get mushed in over time with excess heat
Otherwise they are just bouncy balls, there is no reason why they shouldn't be removed

Just keep in mind that the trampoline mod can get a bit annoying, it's mushy, I was interested in o-rings and trampoline mods in the beginning, but now I enjoy a free bottoming out experience, when I return to a keyboard with a trampoline modded spacebar I'm pretty irritated
Title: Re: Cherry MX Trampoline Mod!
Post by: E3E on Mon, 06 July 2015, 15:35:08
Yeah, that's my position right now--I'm not sure if I want to o-ring my incoming Korean keyboard or use silicone balls, or keep the caps as they are. I'm going to be using some sculptured SA caps for them, and so with o-rings, that means a lot of stacking. That would be $35 on the sale on MassDrop right now, for everything I need, versus $13 on IMSTO for the balls.

I'm honestly not sure if it's worth it. I use o-rings on my current boards, but I kind of find the clack of mechanicals charming. I'm really on the fence of where to go.

Can you, at the very least tell me if there's a noticeable difference with o-rings versus the silicone balls? Is it worth spending so much just for all those 50a o rings? If the difference is negligible, I might cancel the order on MassDrop. Do silicone balls also dampen the sound in the way that proper o-ringing does? Sorry for all the questions!
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Mon, 06 July 2015, 15:39:50
I apologize for necroing this thread, but are the silicone balls removable once placed? I would imagine that they are not.

99% they should be, unless you are living in 45C and they sort of get mushed in over time with excess heat
Otherwise they are just bouncy balls, there is no reason why they shouldn't be removed

Just keep in mind that the trampoline mod can get a bit annoying, it's mushy, I was interested in o-rings and trampoline mods in the beginning, but now I enjoy a free bottoming out experience, when I return to a keyboard with a trampoline modded spacebar I'm pretty irritated


I do like also the mechanical noise unmoded switches do, that is why I just cannot tolerate o-rings, and this mod may suffer from the same mushiness.
Title: Re: Cherry MX Trampoline Mod!
Post by: E3E on Mon, 06 July 2015, 15:43:06
Sounds good to me. I think I might cancel the o-ring sillyness and just go without any rubber additions to my incoming board. I've already got two boards with o-rings, I think it'd be good for some variation. Look at me rationalizing! I do think the clacking that is unique to mechanicals is a nice sound.  ^-^
Title: Re: Cherry MX Trampoline Mod!
Post by: KHAANNN on Mon, 06 July 2015, 15:48:21
Definitely avoid silicone balls or in-switch-pole modifications if you can, they are 10 times more mushy then most o-rings, comparatively o-rings aren't mushy at all

If you're not going to use non-travel-limited keycaps like SA/DSA, o-rings are a nice option, you can always remove them easily

For non-clicky switches, indeed the clack is very enjoyable, but for clicky switches, the additional clack just increases the headache, so if your switches are clicky, your decision should me more challenging :)

I was also pretty confused about o-rings and silicone balls a while ago, now things are pretty simple for me, no o-rings, only switch lubing and tactile/linear switches for regular usage - haven't had any issues or change-urges for months
Title: Re: Cherry MX Trampoline Mod!
Post by: davkol on Mon, 06 July 2015, 15:53:56
30A o-rings are pretty mushy, 70A o-rings are not. It really depends what you use as the trampoline too.
Title: Re: Cherry MX Trampoline Mod!
Post by: E3E on Mon, 06 July 2015, 15:59:49
Yeah, I think I actually prefer the firmer o-rings if I had to choose. I'm definitely not a fan of mushyness, but I have used 70A and have enjoyed the feeling. I like a more firm feedback over one that is too cushioned. I think I can manage with the clacks, since this board will be non-clicky. ^-^

The temptation for the rings on MassDrop was heavy because of their relatively good price (compared to some recent sales by Lpwl). Still, they're 50A, which I'm not familiar with.

I found some o-rings on eBay for much less, but they aren't clear like MD's, and I'd imagine are a bit more firm, which is fine by me. The only thing I'd worry about is how they'd obstruct light, but then again, I'm not using shine-through legend caps, and the SAs are so thick, I don't think any light would shine through anyway.

Thanks for all the responses here, guys. If you have any more thoughts to add, I'd love to hear.

I think in the end, I'll probably go with no o-rings, but the rings on eBay were only a few dollars, so we'll see how those feel!
Title: Re: Cherry MX Trampoline Mod!
Post by: davkol on Mon, 06 July 2015, 16:11:54
You can always get 70A o-rings and cut them like OP.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Tue, 04 August 2015, 03:33:49
Well... I'd say keep it stock with the SA keycaps on for a bit first.

Then, if you really do want to soften the bottom-out a little I highly recommend doing the trampoline mod using the eBay orings. The feeling is different from orings partly due to the fact that when the rubber is compressed enough to fill the tube section it stops compressing, so it's more progressive.

You can tune the "mushiness" and amount of travel with this mod far more than you can with orings. I guess I should write a proper "tuning" table to put in the OP, explaining how to get a particular feel. In your case you may like having around 1mm or so hard piece in the tube first with a really thin soft piece. This will give just a slight damping of the shock on bottom out, while retaining the firmness. It's good to experiment on one or two switches first to find what you like best.

Using orings on contoured / sculptured SA caps gives inconsistent results across rows due to the stacking of different numbers of orings and inability to get them to exactly the same height, not to mention the different compression between the top and bottom areas on the angled caps.

This mod is completely reversible unless you've used a thick lube inside the tube previously or you use large diameter oring pieces that can get stuck in the tube. Just turn the switch / board upside down and tap the base until the rubber pieces fall out.

I also find the latex mod to be a nice touch as a final mod on a board, when all the other factors are just right and you want to also dampen the release sound a little. It complements the trampoline mod very well and helps make the board feel really "premium".
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Thu, 08 October 2015, 05:54:52
Is there a solution to shorten the travel distance only a little with the trampoline mod?  I know it's possible to just cut smaller parts of an o-ring but it's inconsistent.  The silicone balls from imsto shorten the travel distance a little bit too much for me. smaller silicone balls would probably be the solution but I'm not sure they exist.  The perfect shortening of the travel distance for me comes with 1mm o-rings (I need so small o-rings because I use cherry profile caps). 
Title: Re: Cherry MX Trampoline Mod!
Post by: KHAANNN on Thu, 08 October 2015, 06:08:41
No offence to anyone but I have to say the trampoline mod kind of sucks, the o-ring landing is firm, while the trampoline mod is just pure mushiness

For pure travel reduction, maybe you could find/make small metal/plastic discs that gets inserted/glued into the stem-hole

Back when I was using o-rings and when I was interested in this mod, I applied it to a spacebar switch, now that I'm using that keyboard for testing purposes, every time I press the spacebar, I get the urge to just open things up and replace the switch with a decent/non-modded one

Again, it's everyone's own preference, but mechanicals are liked for several reasons, the travel distance and bottom up/down sounds are one of them, this mod replaces 2 of these with mushiness
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Thu, 08 October 2015, 06:47:48
No offence to anyone but I have to say the trampoline mod kind of sucks, the o-ring landing is firm, while the trampoline mod is just pure mushiness

For pure travel reduction, maybe you could find/make small metal/plastic discs that gets inserted/glued into the stem-hole

Back when I was using o-rings and when I was interested in this mod, I applied it to a spacebar switch, now that I'm using that keyboard for testing purposes, every time I press the spacebar, I get the urge to just open things up and replace the switch with a decent/non-modded one

Again, it's everyone's own preference, but mechanicals are liked for several reasons, the travel distance and bottom up/down sounds are one of them, this mod replaces 2 of these with mushiness

Funny, I dislike the clack and the travel distance :)  I like mechs for the tactile feel though.  Looks like it's best for me to just keep the o-rings and don't bother with a trampoline mod.
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Thu, 08 October 2015, 07:22:06
To make a mechanical keyboard to feel mushy goes against its nature; in that case, just get a cheap rubber dome and forget you ever known that there are mechanical keyboards.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Thu, 08 October 2015, 07:49:43
To make a mechanical keyboard to feel mushy goes against its nature; in that case, just get a cheap rubber dome and forget you ever known that there are mechanical keyboards.
my o-rings are totally not mushy
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Thu, 08 October 2015, 07:55:27
To make a mechanical keyboard to feel mushy goes against its nature; in that case, just get a cheap rubber dome and forget you ever known that there are mechanical keyboards.
my o-rings are totally not mushy

Some are not that mushy; but, in general, to make o-rings actually work, they should interfere with the key travel; therefore, at some point the typist will feel the rubber getting mushy under her fingers.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Fri, 09 October 2015, 03:59:03
You can also use a thin rubber / plastic sheet and a hole punch to make more consistent "trampolines" in whatever thickness and material you like.

You can tweak this mod to give whatever balance of mushiness vs hardness you like, the main point is to reduce shock on bottom-out (and noise) and to be both adjustable and keycap-agnostic.

Each to their own.
Title: Re: Cherry MX Trampoline Mod!
Post by: njbair on Sat, 10 October 2015, 12:44:09
I like the idea that you can use this with any cap. Particularly SA caps, which already feel like you're slamming them down. I'm sure it's just a matter of finding the right material to suit your mushiness preference.

And Khan, there are a dozen different ways you could have said that which wouldn't have required "no offense." Just saying.
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Sat, 10 October 2015, 12:56:36
I like the idea that you can use this with any cap. Particularly SA caps, which already feel like you're slamming them down. I'm sure it's just a matter of finding the right material to suit your mushiness preference.

And Khan, there are a dozen different ways you could have said that which wouldn't have required "no offense." Just saying.

My mushiness preference is no mushiness. After all, we all after mechanical keyboards, aren't we?
Title: Re: Cherry MX Trampoline Mod!
Post by: davkol on Sat, 10 October 2015, 14:09:51
To make a mechanical keyboard to feel mushy goes against its nature; in that case, just get a cheap rubber dome and forget you ever known that there are mechanical keyboards.
Please, show me all these rubber-dome Maltron-like keyboards.
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Sat, 10 October 2015, 14:12:10
To make a mechanical keyboard to feel mushy goes against its nature; in that case, just get a cheap rubber dome and forget you ever known that there are mechanical keyboards.
Please, show me all these rubber-dome Maltron-like keyboards.

You right! Get a super expensive rubber-dome instead of a cheap one, and forget about mechanical keyboards.

 :p :p
Title: Re: Cherry MX Trampoline Mod!
Post by: davkol on Sat, 10 October 2015, 15:06:37
wat.

I'm not aware of any such dome-based keyboards. That's why I asked. Actually, there's the microTron at least, but it's very different and still mechanical in a way (Thorpe).

I prefer the feel of some domes or scissor switches at times, but getting/building keyboards with specific layouts/shapes and keycaps is far from simple. That's another reason to stick with discrete switches.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Mon, 12 October 2015, 05:32:11
Long term, hard bottom-out can hurt your fingers and joints, unless you learn not to do it. I get that some prefer it, but then the only reason to participate in this thread is for shortening the travel by using a hard material. Or trolling, but GH members don't do that, do they?

This mod really helps for those who are transitioning from rubber domes where you have to bottom out to actuate the keys. It prevents hard bottoming out and when used with tactile switches helps learn to reduce force at the tactile / actuation point so you're not pressing with force any more when hitting bottom.

I find linears feel weird with orings or trampolines, but I need them, since linears don't have the tactile bump to tell my subconcious to stop adding force. So I just don't use linears.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Mon, 12 October 2015, 07:39:29
Is the trampoline mod more silent than o-rings?
Title: Re: Cherry MX Trampoline Mod!
Post by: davkol on Mon, 12 October 2015, 08:48:22
Is the trampoline mod more silent than o-rings?
Depends on material used, but the trampolines ought to be a bit quieter, at least in theory, because the impact happens inside the switch, not outside.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Tue, 13 October 2015, 05:18:30
Is the trampoline mod more silent than o-rings?
Depends on material used, but the trampolines ought to be a bit quieter, at least in theory, because the impact happens inside the switch, not outside.

Good answer. And in my experience yes, they are. It also depends a bit on your keyboard construction as to how much quieter / how they sound.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Tue, 13 October 2015, 06:47:14
Rubber should be the most silent material right?  Is there anything else to consider using for trampolines?
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Tue, 13 October 2015, 07:01:45
Rubber should be the most silent material right?  Is there anything else to consider using for trampolines?

I've only used various types of rubber, but you could use anything you can fit I guess. Depends what feeling you're after. The shape of the material can affect the feel, too. I have used pieces cut from orings, rubber sheet cut with a hole punch and silicone balls from IMSTO. They all have slightly different feeling due to the softness and shape. The oring pieces are like very slightly curved cylinders, the ones cut with a hole punch looked like hourglass shapes, and the ones from IMSTO are balls. The balls give the most "sudden" stop, the oring pieces and hole punched ones are more "progressive". I think I actually like the oring pieces the most, probably because they're the softest, but they're hard to get consistent. For a balance of feel and consistency the hole punched ones were nice. If I could find a softer sheet of rubber to use, possibly even from Sorbothane, they'd probably be my favourites.

The balls from IMSTO are the easiest option, though, since they're available online and you just drop them into place, no cutting involved.
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Tue, 13 October 2015, 07:19:28
Rubber should be the most silent material right?  Is there anything else to consider using for trampolines?

I've only used various types of rubber, but you could use anything you can fit I guess. Depends what feeling you're after. The shape of the material can affect the feel, too. I have used pieces cut from orings, rubber sheet cut with a hole punch and silicone balls from IMSTO. They all have slightly different feeling due to the softness and shape. The oring pieces are like very slightly curved cylinders, the ones cut with a hole punch looked like hourglass shapes, and the ones from IMSTO are balls. The balls give the most "sudden" stop, the oring pieces and hole punched ones are more "progressive". I think I actually like the oring pieces the most, probably because they're the softest, but they're hard to get consistent. For a balance of feel and consistency the hole punched ones were nice. If I could find a softer sheet of rubber to use, possibly even from Sorbothane, they'd probably be my favourites.

The balls from IMSTO are the easiest option, though, since they're available online and you just drop them into place, no cutting involved.

How mushy the switches get with IMSTO's? when compared with the other options.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Tue, 13 October 2015, 07:34:49
Rubber should be the most silent material right?  Is there anything else to consider using for trampolines?

I've only used various types of rubber, but you could use anything you can fit I guess. Depends what feeling you're after. The shape of the material can affect the feel, too. I have used pieces cut from orings, rubber sheet cut with a hole punch and silicone balls from IMSTO. They all have slightly different feeling due to the softness and shape. The oring pieces are like very slightly curved cylinders, the ones cut with a hole punch looked like hourglass shapes, and the ones from IMSTO are balls. The balls give the most "sudden" stop, the oring pieces and hole punched ones are more "progressive". I think I actually like the oring pieces the most, probably because they're the softest, but they're hard to get consistent. For a balance of feel and consistency the hole punched ones were nice. If I could find a softer sheet of rubber to use, possibly even from Sorbothane, they'd probably be my favourites.

The balls from IMSTO are the easiest option, though, since they're available online and you just drop them into place, no cutting involved.

How mushy the switches get with IMSTO's? when compared with the other options.

They're totally not mushy imo, but they shorten the travel distance for me to use
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Tue, 13 October 2015, 07:36:28
Rubber should be the most silent material right?  Is there anything else to consider using for trampolines?

I've only used various types of rubber, but you could use anything you can fit I guess. Depends what feeling you're after. The shape of the material can affect the feel, too. I have used pieces cut from orings, rubber sheet cut with a hole punch and silicone balls from IMSTO. They all have slightly different feeling due to the softness and shape. The oring pieces are like very slightly curved cylinders, the ones cut with a hole punch looked like hourglass shapes, and the ones from IMSTO are balls. The balls give the most "sudden" stop, the oring pieces and hole punched ones are more "progressive". I think I actually like the oring pieces the most, probably because they're the softest, but they're hard to get consistent. For a balance of feel and consistency the hole punched ones were nice. If I could find a softer sheet of rubber to use, possibly even from Sorbothane, they'd probably be my favourites.

The balls from IMSTO are the easiest option, though, since they're available online and you just drop them into place, no cutting involved.

How mushy the switches get with IMSTO's? when compared with the other options.

They're totally not mushy imo, but they shorten the travel distance for me to use

I just ordered some other stuff from IMSTO but I did not take the silicon balls, maybe I should just for the shake of testing them.
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Tue, 13 October 2015, 07:46:01
Rubber should be the most silent material right?  Is there anything else to consider using for trampolines?

I've only used various types of rubber, but you could use anything you can fit I guess. Depends what feeling you're after. The shape of the material can affect the feel, too. I have used pieces cut from orings, rubber sheet cut with a hole punch and silicone balls from IMSTO. They all have slightly different feeling due to the softness and shape. The oring pieces are like very slightly curved cylinders, the ones cut with a hole punch looked like hourglass shapes, and the ones from IMSTO are balls. The balls give the most "sudden" stop, the oring pieces and hole punched ones are more "progressive". I think I actually like the oring pieces the most, probably because they're the softest, but they're hard to get consistent. For a balance of feel and consistency the hole punched ones were nice. If I could find a softer sheet of rubber to use, possibly even from Sorbothane, they'd probably be my favourites.

The balls from IMSTO are the easiest option, though, since they're available online and you just drop them into place, no cutting involved.

How mushy the switches get with IMSTO's? when compared with the other options.

I have used them on a couple boards.  I think the balls will feel less mushy than the other solutions because they are uniform and there is a limit to how much they can compact in the bottom of the stem.  I have not tried the 'cut o-ring' method, so I am not positive about this.

I will say that the bottom out is softer than if you put standard o-rings on Cherry profile keycaps.  I used Cherry profile PBT with o-rings for a long time.  I personally prefer the silicone balls, but that might also be because they work perfectly with the SA caps (no other dampening solution does).

It definitely shortens the throw of the switch (probably too much for blues because of the little extra piece at the end of the stem).  The shortening of the throw is the closest thing to a problem that I have with these.  It shortens it by just a hair more than I would like, but once you actually use the board a bit, you will completely forget about it.

Hope that helps.  For the record, I am using these again for my latest build project, so I have given this mod some real time...  For $3 you can't go wrong (if you already have something shipping)...
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Tue, 13 October 2015, 07:50:59
Rubber should be the most silent material right?  Is there anything else to consider using for trampolines?

I've only used various types of rubber, but you could use anything you can fit I guess. Depends what feeling you're after. The shape of the material can affect the feel, too. I have used pieces cut from orings, rubber sheet cut with a hole punch and silicone balls from IMSTO. They all have slightly different feeling due to the softness and shape. The oring pieces are like very slightly curved cylinders, the ones cut with a hole punch looked like hourglass shapes, and the ones from IMSTO are balls. The balls give the most "sudden" stop, the oring pieces and hole punched ones are more "progressive". I think I actually like the oring pieces the most, probably because they're the softest, but they're hard to get consistent. For a balance of feel and consistency the hole punched ones were nice. If I could find a softer sheet of rubber to use, possibly even from Sorbothane, they'd probably be my favourites.

The balls from IMSTO are the easiest option, though, since they're available online and you just drop them into place, no cutting involved.

How mushy the switches get with IMSTO's? when compared with the other options.

I have used them on a couple boards.  I think the balls will feel less mushy than the other solutions because they are uniform and there is a limit to how much they can compact in the bottom of the stem.  I have not tried the 'cut o-ring' method, so I am not positive about this.

I will say that the bottom out is softer than if you put standard o-rings on Cherry profile keycaps.  I used Cherry profile PBT with o-rings for a long time.  I personally prefer the silicone balls, but that might also be because they work perfectly with the SA caps (no other dampening solution does).

It definitely shortens the throw of the switch (probably too much for blues because of the little extra piece at the end of the stem).  The shortening of the throw is the closest thing to a problem that I have with these.  It shortens it by just a hair more than I would like, but once you actually use the board a bit, you will completely forget about it.

Hope that helps.  For the record, I am using these again for my latest build project, so I have given this mod some real time...  For $3 you can't go wrong (if you already have something shipping)...

I will send IMSTO an email, to check if my order left, if not, I will add some just to check them.

Edit: I just contacted him, I hope there is still time to add the balls bag  :thumb:
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Tue, 13 October 2015, 12:32:33
So I went to check out some hole punchers and I saw on which was 1/16", would that work for the hole? How big is the hole in a mx switch?  Also what materials would be best?  Didn't find rubber but i saw felt material and foam, would that work?  How about just paper?  And why not just use a liquid latex dampen bottom down sound?
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Tue, 13 October 2015, 19:03:39
So I went to check out some hole punchers and I saw on which was 1/16", would that work for the hole? How big is the hole in a mx switch?  Also what materials would be best?  Didn't find rubber but i saw felt material and foam, would that work?  How about just paper?  And why not just use a liquid latex dampen bottom down sound?
If you go this route I would probably try to use a closed cell silicone or neoprene foam with about 30-50 durometer.  That's my hunch. If you want I can probably test it for you this weekend. I have a few different materials and I should have a small enough leather punch. I can try to give you a comparison between the IMSTO balls and the tests.

I have a lot going on right now, so I apologize if I am a bit slow.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Wed, 14 October 2015, 04:10:28
So I went to check out some hole punchers and I saw on which was 1/16", would that work for the hole? How big is the hole in a mx switch?  Also what materials would be best?  Didn't find rubber but i saw felt material and foam, would that work?  How about just paper?  And why not just use a liquid latex dampen bottom down sound?

Foam would work best out of those options. Felt would also dampen the sound, but I think it would feel weird. Could be worth a try, though. The hole is 2mm diameter, so 1/16" will fit inside, but may be a bit loose. I use a leather hole punch which has a rotating part with different sizes on.

There is a 0.8mm gap between the slider pole and bottom of the hole for tactile and linear switches, so if you use latex it has to be on a different part of the switch. I'd probably put it on the bottom casing where the flat part of the slider hits, but there are two reasons why I'd think twice about doing that:

1. It doesn't damp the force or sound as much as a rubber piece in the stem.
2. It's an open area and the latex layer could come loose too easily. In the top housing it's in a mostly enclosed area and under pressure the whole time a switch is at rest. This helps keep it attached and in place.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Wed, 14 October 2015, 11:27:41
 
So I went to check out some hole punchers and I saw on which was 1/16", would that work for the hole? How big is the hole in a mx switch?  Also what materials would be best?  Didn't find rubber but i saw felt material and foam, would that work?  How about just paper?  And why not just use a liquid latex dampen bottom down sound?
If you go this route I would probably try to use a closed cell silicone or neoprene foam with about 30-50 durometer.  That's my hunch. If you want I can probably test it for you this weekend. I have a few different materials and I should have a small enough leather punch. I can try to give you a comparison between the IMSTO balls and the tests.

I have a lot going on right now, so I apologize if I am a bit slow.

That would be most appreciated sir :D  Somehow it's my hunch that most materials will work but I will test it tomorrow. 

The foam which i saw a the store was 2mm thick so I won't bother with that, I need something more along the lines of 1mm for my travel shortening needs.

Foam would work best out of those options. Felt would also dampen the sound, but I think it would feel weird. Could be worth a try, though. The hole is 2mm diameter, so 1/16" will fit inside, but may be a bit loose. I use a leather hole punch which has a rotating part with different sizes on.


I'm going to try out the felt and a paper, and maybe a sock :D.

I can buy a 2mm or 1.5875 mm hole puncher, which do you guys think will be better for the 2mm hole?
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Wed, 14 October 2015, 11:30:19
So I went to check out some hole punchers and I saw on which was 1/16", would that work for the hole? How big is the hole in a mx switch?  Also what materials would be best?  Didn't find rubber but i saw felt material and foam, would that work?  How about just paper?  And why not just use a liquid latex dampen bottom down sound?
If you go this route I would probably try to use a closed cell silicone or neoprene foam with about 30-50 durometer.  That's my hunch. If you want I can probably test it for you this weekend. I have a few different materials and I should have a small enough leather punch. I can try to give you a comparison between the IMSTO balls and the tests.

I have a lot going on right now, so I apologize if I am a bit slow.

That would be most appreciated sir :D  Somehow it's my hunch that most materials will work but I will test it tomorrow. 

The foam which i saw a the store was 2mm thick so I won't bother with that, I need something more along the lines of 1mm for my travel shortening needs.

Foam would work best out of those options. Felt would also dampen the sound, but I think it would feel weird. Could be worth a try, though. The hole is 2mm diameter, so 1/16" will fit inside, but may be a bit loose. I use a leather hole punch which has a rotating part with different sizes on.


I'm going to try out the felt and a paper, and maybe a sock :D.

I can buy a 2mm or 1.5875 mm hole puncher, which do you guys think will be better for the 2mm hole?
You will want to use materials that will return to its original form once the key is released I think.  Also, you will want a material that will not degrade with usage like anything woven. My two cents anyway.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Wed, 14 October 2015, 14:00:36
So i found a place where you can buy neoprene rubber in my country

http://www.fossberg.is/?prodid=1434

I can buy a leather puncher which is 2mm with it (I'm assuming 2mm is better than 1.5875mm for this job)

the smallest kind of rubber sheet is 1mm however

and I'm actually worried it's actually too thick

because, I use cherry profile, and with that profile an o-ring is more severe on travel distance shortening, and I actually want travel distance shortening but very little it seems since 1mm o-rings are my favorite

according to your research here swill https://geekhack.org/index.php?topic=53174.msg1186392#msg1186392 if I understand everything correctly, that means that the shortening of the travel distance is = 4.15 - 3.95 = 0.2mm with 1mm o-rings.  Well doesn't that mean that I would need a 0.2mm material for a trampoline mod for the same travel distance shortening? 
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Thu, 15 October 2015, 06:00:38
So i found a place where you can buy neoprene rubber in my country

http://www.fossberg.is/?prodid=1434

I can buy a leather puncher which is 2mm with it (I'm assuming 2mm is better than 1.5875mm for this job)

the smallest kind of rubber sheet is 1mm however

and I'm actually worried it's actually too thick

because, I use cherry profile, and with that profile an o-ring is more severe on travel distance shortening, and I actually want travel distance shortening but very little it seems since 1mm o-rings are my favorite

according to your research here swill https://geekhack.org/index.php?topic=53174.msg1186392#msg1186392 if I understand everything correctly, that means that the shortening of the travel distance is = 4.15 - 3.95 = 0.2mm with 1mm o-rings.  Well doesn't that mean that I would need a 0.2mm material for a trampoline mod for the same travel distance shortening?

No. There is a 0.8mm gap (on tactile and linear switches) between the bottom of the slider pin and the bottom of the tube hole when the switch is at bottom out, so 1mm material will touch at 0.2mm before bottom out and compress from there. If it's foam, you may find the switch still bottoms out (flat part of slider hits bottom case) once the foam compresses if you use 1mm.

On clicky switches, the slider pin has an extension which touches or at least comes very close to touching at bottom out, so if you want to do this mod on Blues, Greens or Whites you need a thinner piece.

2mm hole punch is the best size to use.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Thu, 15 October 2015, 08:33:25
I tried using a 2mm hole punch but it's troublesome because its exactly the same diameter and it's hard to push the rubber through the hole and the rubber and ends up turning sideways, i will test the 1/16" inch one and report back. 

regarding imsto's balls

http://www.imsto.cn/image/data/selicaball2.JPG

are they = 2mm diameter?
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Thu, 15 October 2015, 12:09:32
So i bought a new hole puncher which is 1,585 diameter and is a confetti puncher, it worked great.  However my materials failed me. everything henceforth is 1,585 in diameter and the values are the thickness :1mm rubber is too small, it doesn't dampen the sound.  I tried cutting an 1.2mm o-ring but the travel distance reduction was a tad too much.  foam didn't work well since the material gives in so much that 2mm and 2x 2mm balls of it didn't dampen the sound.  my felt was 1mm so that was too small to do anything.  I might try out 1.5mm rubber sheet but maybe  the trampoline mod is not available in my travel distance preference. 
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Thu, 15 October 2015, 23:26:12
Have you ever consider that micro switches based on cross-point contact mechanisms with springs are designed with no rubber parts for a reason?

Title: Re: Cherry MX Trampoline Mod!
Post by: davkol on Fri, 16 October 2015, 06:09:39
Have you ever consider that micro switches based on cross-point contact mechanisms with springs are designed with no rubber parts for a reason?
Persistent troll is persistent. I like that.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Thu, 22 October 2015, 11:55:40
OK so update, I bought 1.5mm rubber but they turned out to be too thick for the cherry mx switches, that is they reduced the travel distance too much for me, not everyone will agree with me though.  I'm using 1,585mm diameter puncher so the ball is 1,5mm x 1,585mm

So then I read this from Oobly in the Zealio GB thread

First off, there's another difference between these and "genuine" MX. The slider rod and tube are slightly different and they leave a smaller gap at bottom out (eyeballing it, it looks closer to 0.5mm compared to the 0.8mm of "genuine" MX). Which means trampoline modding these requires different thicknesses of material. The balls from IMSTO result in too much loss of travel and increased "mush". I'll be posting more about this in the trampoline mod thread, but so far it looks like slices of orings do the best job.

So I decided to check the 1mm again and with the zealios this time not original cherry mx, and the first impression is that they might just be about perfect!  the correct distance shortening and it does dampen the sound.  One thing that irks me though: the dimensions are 1mm x 1,585mm, one would think that the higher dimension would be the controlling dimension, that is the material thickness which makes the difference, but it hasn't really been like that in my testing.  For example with cherry mx the 1,5mm x 1,585mm was too much of a travel distance shortening and 1mm x 1,585mm did not damp the sound and had no (noticeable) travel distance shortening even though it had the same "controlling dimension"

Another thing, one would however think that 1mm x 1,585mm would be troublesome since it isn't the same however the goes into the switch hole, that is if it's vertical or horizontal.  it's quite hard to get the same alignment every time, and it could be that the material would move around with each keypress and change it's alignment (though I'd also believe that it would be quite stable since 1,585mm is quite close to 2mm (I'm not even sure if the hole has 2mm inner or outer diameter to come to think of it though) and rubber is quite "sticky" if that makes sense.

I will need to experiment with the 1mm x 1,585mm in about 10 switches to see if they are consistent.
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Thu, 22 October 2015, 11:58:55
Can you post which switches you are testing with as well?
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Thu, 22 October 2015, 12:34:35
Have you ever consider that micro switches based on cross-point contact mechanisms with springs are designed with no rubber parts for a reason?
Persistent troll is persistent. I like that.

Since when stating a fact is trolling, or maybe you are the trolling judge.

I will try the balls mod as soon as I get IMSTO's order; but, that does not change the fact that no discrete mechanical switch has been designed with rubber components.
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Thu, 22 October 2015, 12:35:39
Have you ever consider that micro switches based on cross-point contact mechanisms with springs are designed with no rubber parts for a reason?
Persistent troll is persistent. I like that.

Since when stating a fact is trolling, or maybe you are the trolling judge.

I will try the balls mod as soon as I get IMSTO's order; but, that does not change the fact that no discrete mechanical switch has been designed with rubber components.
I didn't think you were trolling. :)
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Thu, 22 October 2015, 12:37:54
Have you ever consider that micro switches based on cross-point contact mechanisms with springs are designed with no rubber parts for a reason?
Persistent troll is persistent. I like that.

Since when stating a fact is trolling, or maybe you are the trolling judge.

I will try the balls mod as soon as I get IMSTO's order; but, that does not change the fact that no discrete mechanical switch has been designed with rubber components.
I didn't think you were trolling. :)

At least, that was not my intention. I just thought out loud about an actual question I have for my self.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Thu, 22 October 2015, 12:43:42
Can you post which switches you are testing with as well?

Mx clears and zealios purple
Title: Re: Cherry MX Trampoline Mod!
Post by: unoab on Thu, 22 October 2015, 12:47:43
that does not change the fact that no discrete mechanical switch has been designed with rubber components.

What about SKCM damped alps, does that count?
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Thu, 22 October 2015, 12:52:36
that does not change the fact that no discrete mechanical switch has been designed with rubber components.

What about SKCM damped alps, does that count?

Good point. They have two rubber inserts each.
Title: Re: Cherry MX Trampoline Mod!
Post by: heroinbob on Sun, 25 October 2015, 23:32:57
I just found out about there being a name for what I've been calling internal dampening (trampoline mod). 

I use Ninjaflex (flexible 3d printer filament) for my internal dampening.  Very cheap if you know someone with a spool - not worth buying a spool just for this mod.

Its critical that you cut the pieces with a razorblade at identical lengths for uniformity across switches.

I superglue the "piece of flex filament" to the bottom of the stem for consistency.

I found a project on thingiverse for a miniature razor chop plate (think a miniature old-school paper cutter, but uses an industrial razor blade instead).

The silicone balls looks a lot easier though.

Paul (HB)
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Mon, 26 October 2015, 08:33:10
I just found out about there being a name for what I've been calling internal dampening (trampoline mod). 

I use Ninjaflex (flexible 3d printer filament) for my internal dampening.  Very cheap if you know someone with a spool - not worth buying a spool just for this mod.

Its critical that you cut the pieces with a razorblade at identical lengths for uniformity across switches.

I superglue the "piece of flex filament" to the bottom of the stem for consistency.

I found a project on thingiverse for a miniature razor chop plate (think a miniature old-school paper cutter, but uses an industrial razor blade instead).

The silicone balls looks a lot easier though.

Paul (HB)

It sounds interesting for someone that has the time available to spend on this project; for practical reasons, I will try to silicon balls, I was able to ask IMSTO to include them in a previous un-shipped order I made.
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Thu, 29 October 2015, 09:17:40
that does not change the fact that no discrete mechanical switch has been designed with rubber components.

What about SKCM damped alps, does that count?

Good point. They have two rubber inserts each.

Also the new MX "Silent" switches. Same principal as the Alps damped. If they brought out "Silent" Clears in RGB cases and 62g springs I may be tempted to try those... The new "white" linear is finally using a different spring to both Reds and Blacks, right in the "goldilocks" zone for MX switches (from the charts shown it looks like 62 to 65g), so there is actually some hope of this eventually happening. With new molds for both case and slider they have a chance of being a lot smoother than current batches of MX, too.

1mm is too thin on stock MX tactile and linears to have much effect, since there'll only be around 0.2mm of movement after contact. This will probably not be enough to resist much force and so you'll still bottom-out the switch (slider flat parts will hit the bottom case).

I haven't measured it yet, but the gap on Zealios is around 0.3mm smaller, so 1mm may work fine with them. I've been playing around with oring pieces slightly thicker than that, maybe 1.2mm and I like the feel. I use about 1.5mm on Clears.

I tried IMSTO balls cut in half, but they're a bit too thin. They make contact, but don't provide enough resistance as they deform.

@Paul, nice to see someone else come up with the same idea :) I don't bother gluing my pieces as they have no way to escape the hole and stay oriented just fine. It's hard to cut orings to exact length as they're curved, so it's nice to know of other materials that can be used. Hole punched rubber sheets, balls from IMSTO, cut orings and now... flexible 3D printer filament :) Looks like nice stuff for creating custom protective casings for gadgets.
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Thu, 29 October 2015, 09:53:55
I am waiting for the "balls" - IMSTO's balls - to get them mailed and I will try them, I think the different stems and spring modules may have a synergistic effect with the balls to make them work better; therefore, I am planning to try different combinations.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Thu, 29 October 2015, 14:31:18
So I realized that using my 1mmx1,585mm rubber pads won't work since they move inside the switch and change from horizontal and vertical so the feeling changes all the time.  I know that it's perfect horizontal so 1mm width is what I'm looking for.  So I just need to buy a 1mm hole puncher.

Or. I can buy some 1mm diameter balls.  From a short google I found this http://www.alibaba.com/product-detail/Factory-direct-sale-white-or-black_60196027577.html?spm=a2700.7724838.30.1.j2k2Dc
these are rubber not silicone, I wonder if it will make much of a difference?
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Fri, 30 October 2015, 02:21:07
So I realized that using my 1mmx1,585mm rubber pads won't work since they move inside the switch and change from horizontal and vertical so the feeling changes all the time.  I know that it's perfect horizontal so 1mm width is what I'm looking for.  So I just need to buy a 1mm hole puncher.

Or. I can buy some 1mm diameter balls.  From a short google I found this http://www.alibaba.com/product-detail/Factory-direct-sale-white-or-black_60196027577.html?spm=a2700.7724838.30.1.j2k2Dc
these are rubber not silicone, I wonder if it will make much of a difference?

If you clean the surfaces well, you could try doing as Paul does and superglue them to the bottom of the pin. May not hold well, though, as they deform when pressed, so they may detach from the glue, but probably worth a try before ordering a bunch of balls. They mention the hardness measurement type (Shore A), but not the actual hardness, so I'm not sure how they'll compare.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Tue, 03 November 2015, 11:23:47
Update: I bought a 1mm hole puncher, seems to work perfect as a first impression.

Of course, the thing isn't perfectly round or anything but it should be approximately well shaped to do it's work consistently I think.  Of course, it jumps around a lot inside the switch and switches orientation, but that shouldn't be a problem I think.  I don't see any reason why I shouldn't try it on a whole board, please tell me if you think otherwise :) 
Title: Re: Cherry MX Trampoline Mod!
Post by: switchnollie on Tue, 03 November 2015, 12:52:07
Very interesting, think I'll give it a try later today!
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Wed, 04 November 2015, 16:40:27
Just finished a board with latex & trampoline mod as I mentioned I was going to do.  The trampoline mod seems consistent, I don't notice any incosistencies, and the travel distance reduction seems roughly as much as 1mm o-ring would do with cherry profile caps (maybe a tad more travel reduction but I don't think I mind it).  The board is silent as hell also,  I'm still deciding if I prefer it or not.  Should be very cool for a work environment though, which I'm going to use it for.
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Wed, 04 November 2015, 16:41:22
Just finished a board with latex & trampoline mod as I mentioned I was going to do.  The trampoline mod seems consistent, I don't notice any incosistencies, and the travel distance reduction seems roughly as much as 1mm o-ring would do with cherry profile caps (maybe a tad more travel reduction but I don't think I mind it).  The board is silent as hell also,  I'm still deciding if I prefer it or not.  Should be very cool for a work environment though, which I'm going to use it for.

Post a video, or it never happens...
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Wed, 18 November 2015, 11:43:59
Here is a potato video showcasing the latex mod on the ultra silent board with the trampoline mod (actuation happens on the inside so it's quieter than o-rings) and lubed zealios

feature=youtu.be

My verdict on the mod:

I don't like it.  Sorry. 

1.  I think it makes the board too silent.  I dislike the stock clack on mx but I like some auditory feedback like with the upstroke sound, well it's not necessarily about the feedback but about the feeling of satisfaction that you are getting some work done which comes from the keyboard sounds. 
2.  It feels like it gums up the switch, it makes it somehow mushier.  The upstroke is now soft instead of hard and it gives you a mushy feel.
3.  The audio kind of reminds me of topre/rubber domes right now, which I dislike
4.  The mod is really hard to make consistent and I feel it might have a slight effect on travel distance in some cases

and for the trampoline mod: it also makes the switch mushier compared to o-rings I feel.  It also has a little bit more travel reduction than 1mm o-rings with cherry profile caps.  Which I dislike. 

I will be removing the latex and trampoline mods and will keep using my 1mm o-rings.
Title: Re: Cherry MX Trampoline Mod!
Post by: slushi on Wed, 18 November 2015, 14:03:46
Here is a potato video showcasing the latex mod on the ultra silent board with the trampoline mod (actuation happens on the inside so it's quieter than o-rings) and lubed zealios

feature=youtu.be

My verdict on the mod:

I don't like it.  Sorry. 

1.  I think it makes the board too silent.  I dislike the stock clack on mx but I like some auditory feedback like with the upstroke sound, well it's not necessarily about the feedback but about the feeling of satisfaction that you are getting some work done which comes from the keyboard sounds. 
2.  It feels like it gums up the switch, it makes it somehow mushier.  The upstroke is now soft instead of hard and it gives you a mushy feel.
3.  The audio kind of reminds me of topre/rubber domes right now, which I dislike
4.  The mod is really hard to make consistent and I feel it might have a slight effect on travel distance in some cases

and for the trampoline mod: it also makes the switch mushier compared to o-rings I feel.  It also has a little bit more travel reduction than 1mm o-rings with cherry profile caps.  Which I dislike. 

I will be removing the latex and trampoline mods and will keep using my 1mm o-rings.

Thanks for the video. Just to clarify, you have both the silicon balls as well as the o rings around the top of the switch?
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Wed, 18 November 2015, 18:39:21
I don't use imsto's silicone balls if you are referring to them (they are too big for me) I use my own 1mm x 1mm rubber neoprene.  I also use the latex mod discussed earlier in this thread (which you could call o-rings for the top of the switch, they silence the upstroke)
Title: Re: Cherry MX Trampoline Mod!
Post by: swill on Wed, 18 November 2015, 18:41:08
Here is a potato video showcasing the latex mod on the ultra silent board with the trampoline mod (actuation happens on the inside so it's quieter than o-rings) and lubed zealios

feature=youtu.be

My verdict on the mod:

I don't like it.  Sorry. 

1.  I think it makes the board too silent.  I dislike the stock clack on mx but I like some auditory feedback like with the upstroke sound, well it's not necessarily about the feedback but about the feeling of satisfaction that you are getting some work done which comes from the keyboard sounds. 
2.  It feels like it gums up the switch, it makes it somehow mushier.  The upstroke is now soft instead of hard and it gives you a mushy feel.
3.  The audio kind of reminds me of topre/rubber domes right now, which I dislike
4.  The mod is really hard to make consistent and I feel it might have a slight effect on travel distance in some cases

and for the trampoline mod: it also makes the switch mushier compared to o-rings I feel.  It also has a little bit more travel reduction than 1mm o-rings with cherry profile caps.  Which I dislike. 

I will be removing the latex and trampoline mods and will keep using my 1mm o-rings.
You did both the trampoline mod (ball in the stem) and the latex mod (to silence the upstroke), right?
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Wed, 18 November 2015, 19:06:50
Here is a potato video showcasing the latex mod on the ultra silent board with the trampoline mod (actuation happens on the inside so it's quieter than o-rings) and lubed zealios

feature=youtu.be

My verdict on the mod:

I don't like it.  Sorry. 

1.  I think it makes the board too silent.  I dislike the stock clack on mx but I like some auditory feedback like with the upstroke sound, well it's not necessarily about the feedback but about the feeling of satisfaction that you are getting some work done which comes from the keyboard sounds. 
2.  It feels like it gums up the switch, it makes it somehow mushier.  The upstroke is now soft instead of hard and it gives you a mushy feel.
3.  The audio kind of reminds me of topre/rubber domes right now, which I dislike
4.  The mod is really hard to make consistent and I feel it might have a slight effect on travel distance in some cases

and for the trampoline mod: it also makes the switch mushier compared to o-rings I feel.  It also has a little bit more travel reduction than 1mm o-rings with cherry profile caps.  Which I dislike. 

I will be removing the latex and trampoline mods and will keep using my 1mm o-rings.
You did both the trampoline mod (ball in the stem) and the latex mod (to silence the upstroke), right?

yes
Title: Re: Cherry MX Trampoline Mod!
Post by: Oobly on Thu, 19 November 2015, 06:00:30
The latex mod should have truly minimal effect to the feel and travel since it's literally a paper thin layer of material. In any case, you can't "feel" the upstroke, only hear it. It's also really consistent on my own switches, since it's such a thin layer. What material did you use and how did you apply it?

Neoprene is "mushier" than solid rubber, so that will contribute to the mushy feel. Both the material and the shape affect the feeling. If you want a harder bottom out, either use something that fills the hole more completely or use a harder material. If the piece fills the hole when compressing it will stop the slider moving further, since most rubbers are flexible, but not really compressible. This is also why the balls feel different to the oring pieces, even though they're very similar hardness.

Kudos for trying the mods and finding your preference, but I feel that you could make them work better for your preferences with some changes.

I agree, the audio is similar to silenced Topre and I find the bottom-out feel with oring pieces has similarities, too. But I still much prefer the tactility of Clears / Purple Zealios to Topre, so I like the mod on Zealios. After trying a few different versions the sliced red silicone orings still feel the best to me. I already gave a preview of the sound with my video earlier in the thread.
Title: Re: Cherry MX Trampoline Mod!
Post by: asgeirtj on Thu, 19 November 2015, 06:37:21
The latex mod should have truly minimal effect to the feel and travel since it's literally a paper thin layer of material. In any case, you can't "feel" the upstroke, only hear it. It's also really consistent on my own switches, since it's such a thin layer. What material did you use and how did you apply it?

Neoprene is "mushier" than solid rubber, so that will contribute to the mushy feel. Both the material and the shape affect the feeling. If you want a harder bottom out, either use something that fills the hole more completely or use a harder material. If the piece fills the hole when compressing it will stop the slider moving further, since most rubbers are flexible, but not really compressible. This is also why the balls feel different to the oring pieces, even though they're very similar hardness.

Kudos for trying the mods and finding your preference, but I feel that you could make them work better for your preferences with some changes.

I agree, the audio is similar to silenced Topre and I find the bottom-out feel with oring pieces has similarities, too. But I still much prefer the tactility of Clears / Purple Zealios to Topre, so I like the mod on Zealios. After trying a few different versions the sliced red silicone orings still feel the best to me. I already gave a preview of the sound with my video earlier in the thread.

I used liquid latex and used a brush to apply it.
Title: Re: Cherry MX Trampoline Mod!
Post by: mecano on Fri, 18 December 2015, 05:18:28
What about sorbothane? As it is *said* to be the most efficient material available nowadays for shock absorption, it may be used in a much smaller proportion and so be of better use with cherry profile caps (ie not reducing the switch travel as others). Problem will be to find proper size sheets and cut them I guess.
Title: Re: Cherry MX Trampoline Mod!
Post by: jacobolus on Fri, 01 January 2016, 00:10:23
I don’t know if sorbothane really makes sense for this use case. Sorbothane is a great tool for damping high-frequency vibrations when it’s under a particular range of load. This makes it great for e.g. isolating delicate components from shock, or isolating loudspeakers from whatever surface they’re sitting on. I don’t know if anyone uses it in applications where the sorbothane itself would be directly impacted starting from zero load.

You could probably reduce keyboard noise by e.g. squeezing a piece of sorbothane in between a PCB-mounted switch and the PCB (though you still would have a direct connection via the solder, so all you’d really prevent is plastic-on-plastic collisions), or using sorbothane pieces to isolate PCB/plate/case/table from each-other.
Title: Re: Cherry MX Trampoline Mod!
Post by: spectre6000 on Thu, 04 February 2016, 17:25:25
(First post)
Intro: Software engineer by day, shop rat (wood, metal, machines, etc.) by night. I build and maintain all my own rides, and I don't own any newer than me.

I have an answer for the liquid latex longevity issue. Permatex Right Stuff gasket maker.

(http://img.directindustry.com/pdf/repository_di/25365/permatex-r-the-right-stuff-r-brochure-320125_1b.jpg)

It is used to seal engines where you have to deal with lots of chemicals, vibration, heat, time, pressure, and on and on and on. In the muscle car world, this is the preferred way to seal an intake manifold on a performance-oriented V8. Ditch the factory end seals, and lay a bunch of this stuff down. Seriously heavy duty stuff. It sticks very well to ABS (the material the switch housings are made of), but does NOT stick well to the stem material (fortunately/unfortunately). When cured, it feels very much like silicon, but they call it "elastomeric 'formed-in-place' material".

In my initial test, I applied a small amount on a single switch with an eyeglass screwdriver. This worked very well. In a subsequent test, I applied a crap load with the same screwdriver, allowed it to fully cure, then trimmed away the excess (seems more repeatable and less monotonous over ~100 keys). In the latter case I left a much heavier amount, and the result was complete silence on the upstroke. A properly mounted red/black with this, o-rings, stickers, and a little grease will be absolutely completely silent without qualification.

You can get it at any FLAPS (Friendly Local Auto Parts Store). I'm not sure what sizes it comes in, but I get the size pictured and it runs about $20 a tube. You definitely won't use all of it, but it can get pretty messy and there will be quite a bit of waste. It's not especially smelly, but it's super messy. If it gets on anything but an absolutely smooth surface, it's permanent. It can be permanent on smooth surfaces as well if not wiped up immediately. It's nasty stuff in that regard. Wear properly fitting gloves and disposable clothing.

There are other types of gasket maker available with different qualities. I imagine there are harder and softer varieties (different feels). Save the ultra-high temp stuff for exhausts though (I believe it contains copper, and thus presents some potential concerns), this is the only stuff I really use in the shop. Of all the varieties I've used though, this is the most hard core and least likely to let go.
Title: Re: Cherry MX Trampoline Mod!
Post by: mashby on Fri, 05 February 2016, 11:19:09
Interesting! If you end up doing this again, please shoot some photos, or videos.
Title: Re: Cherry MX Trampoline Mod!
Post by: ideus on Fri, 05 February 2016, 17:59:54
I strongly preferred the naked switches to the silicon balls. Long time passed and I finally got the silicon balls from IMSTO, I tried them but again, I really hate the mushiness, any way, I gave it a try.
Title: Re: Cherry MX Trampoline Mod!
Post by: spectre6000 on Fri, 05 February 2016, 22:26:30
[url]https://geekhack.org/index.php?topic=79400.0[/u]

Uploading videos now (assuming they ever make it through the tubes). I was going toward a slightly different goal, but I think I ended up with something with a similar net result.
Title: Re: Cherry MX Trampoline Mod!
Post by: rioc on Tue, 30 May 2017, 02:21:19
I read through the whole thread but couldn't find comment of someone who tried all options. (Cut up O-Rings, punched out landing pads (or similar) and silicone balls).

Did anyone here try multiple variants and if so, which one was best or most consistent?

PS:
Title: Re: Cherry MX Trampoline Mod!
Post by: dubious on Fri, 02 June 2017, 18:36:20
https://geekhack.org/index.php?topic=50632.msg1894447#msg1894447

Oobly tried out all three, and gives a short comparison of each.

I'm interested in the silicon/gasket maker mod... might be worth trying silicon on the stems, similar to how they make the new Cherry MX Silent switches..

ghetto silent clears  :eek:
Title: Re: Cherry MX Trampoline Mod!
Post by: lordchecksalot on Tue, 15 February 2022, 19:55:56
I tried this with sorbothane inside the pole and it felt better than the o-ring (both o-ring trampoline and o-ring standard application).  More specifically, it felt more progressive and there was no hard stop.

Very interested to hear if anyone else tries the permatex (noted above by spectre) as that sounds the most promising.