Author Topic: IBM Model M : reseating keys properly  (Read 1412 times)

0 Members and 1 Guest are viewing this topic.

Offline Special K

  • Thread Starter
  • Posts: 406
IBM Model M : reseating keys properly
« on: Tue, 17 February 2015, 11:30:51 »
I took apart my model M for a cleaning last night and when I was reassembling it I noticed that some of the keycaps I replaced did not seem to be seating properly.  Whereas a normal model M key has a definite tactile point and audible click/ping noise when the spring buckles, some of my keys just kind of sunk down with no definite tactile point or click/ping noise. 

I tried taking the caps off and reseating them, but the issue remains.  I have not yet plugged in the keyboard to see if these keys are actually registered when pressed, but I don't see any point in using the keyboard if the tactile and audible feedback is gone.  The keyboard worked, felt, and sounded fine before I disassembled it.  The springs under the keys that don't seem to be seated properly don't look any different than the springs under the keys that are seated properly.

Do I have broken springs/switches, or is there some trick to reseating the keycaps properly?  The enter key on the numpad in particular is giving me the most trouble.  Even though the key appears to be seated and the stabilizer bar appears to be latched to the plastic backplate, the key itself doesn't have any tactility; pressing it just feels like pressing into mush.

Filco FKBN104MC/EB
Filco FKBN104M/EB2
IBM Model M 1391401 - 11/13/87

Quote from: ripster
LOL - we're on post #163 of this mega-thread and you've gone from"keyboard n00b" to "keyboard sn0b".  We've done our job.

Offline E TwentyNine

  • Posts: 827
    • Some of My Keyboards
Re: IBM Model M : reseating keys properly
« Reply #1 on: Tue, 17 February 2015, 11:38:00 »
The trick is to tilt the keyboard forward, away from you, when seating the keys.  You'll see the spring tilt forward in the barrel when you do this.
Daily driver: SSK or Tenkeyless IBM AT
1984 Model M Industrial Prototype ⌨ 1992 Black Oval Industrial SSK ⌨ 1982 5251 Beam Spring ⌨ 89 Key "SSK" ⌨ M13 triplets

Offline Snowdog993

  • Grace Under Pressure
  • Posts: 1466
  • Location: Over There! (Pointing)
  • Justifiably Clueless.
Re: IBM Model M : reseating keys properly
« Reply #2 on: Tue, 17 February 2015, 11:38:20 »
One thing to check is to be sure that the spring is guided properly in the stem itself.  Make sure the key stem isn't upside down too!  Um, you didn't pull on any of the springs or take any of them off, I presume.
If a spring is doubled over from not paying attention when you put the stem in, be very careful and unbind it from the barrel without taking it off.  You might need a paper clip to do this.  (I can't explain it better than that.)
Make sure that all the springs are sticking straight out of the barrels too.
Hope this helps, I don't know if it will or not. 
« Last Edit: Tue, 17 February 2015, 11:45:18 by Snowdog993 »
If you want to see pictures you can go here: http://snowdog993.imgur.com

Offline fohat.digs

  • * Elevated Elder
  • Posts: 5486
  • Location: 34.04 N 84.47 W
  • weird funny old guy
Re: IBM Model M : reseating keys properly
« Reply #3 on: Tue, 17 February 2015, 12:11:51 »
If you look into the key stem, there is a little "ski slope" affair leading to a dimple where the top of the spring seats.

If the spring is not properly centered on that dimple, for whatever reason, the spring will not buckle properly.
 
After Trump’s speech, Trump’s team sent out a mass email to his supporters (supposedly directly from Trump) soliciting half a million dollars in donations specifically for something named as the “Official Secure the Border Fund.”  The email asserted that the half a million needed to be raised in one day, and that there was a 9 PM Eastern “deadline" for the funds to be donated.  The email went on to say that Trump had directed his staff to bring him a list of “EVERY AMERICAN PATRIOT” (all caps in the original, of course) who had donated.  (Never mind wondering how he would have time to read such a list after 9 pm, when his speech began.)
At the end of the email — my guess would be in smaller print — was a disclaimer that all donations would be given to Trump’s 2020 re-election campaign fund.  That’s right — NOT to some alleged “Official Secure the Border Fund.”
After the speech, a second email went out to supporters who had not donated, asserting that when Trump reviewed the list of donations, “he noticed that your name was not on the list.”  (I kid you not.)  Therefore, the “deadline" was being extended so that the singled-out supporter could have a chance to donate to the “Official Secure the Border Fund" and get on the list.
- Lawrence O'Donnell 2019

Offline Touch_It

  • Posts: 700
Re: IBM Model M : reseating keys properly
« Reply #4 on: Tue, 17 February 2015, 12:28:55 »
Everyone else has already stated the troubleshooting steps.  Only thing I might add is that sometimes it can take multiple tries to re-seat keys properly.  I've never had issues on a Model M but have on my Model F, though the principal is exactly the same.


Visit the Typing Test and try!

Offline Special K

  • Thread Starter
  • Posts: 406
Re: IBM Model M : reseating keys properly
« Reply #5 on: Tue, 17 February 2015, 22:29:08 »
The trick is to tilt the keyboard forward, away from you, when seating the keys.  You'll see the spring tilt forward in the barrel when you do this.

Thanks, this proved to be the key.  I held the keyboard vertical top/logo side facing downward while installing the keycaps and everything lined up fine.

The other problem I had was with the + and Enter keys on the numpad.  Apparently it matters which way you attach the stabilizer bar.  One end of the stabilizer bar is slightly longer than the other one.  That side needs to attach to the bottom end of the key, otherwise the key will not press down properly.

The Model M is by far the most finicky keyboard I have used (so far).
Filco FKBN104MC/EB
Filco FKBN104M/EB2
IBM Model M 1391401 - 11/13/87

Quote from: ripster
LOL - we're on post #163 of this mega-thread and you've gone from"keyboard n00b" to "keyboard sn0b".  We've done our job.

Offline Melvang

  • Exquisite Lord of Bumfluff
  • * Maker
  • Posts: 4388
  • Location: Waterloo, IA
  • Melvang's Desktop Customs
Re: IBM Model M : reseating keys properly
« Reply #6 on: Tue, 17 February 2015, 22:41:53 »
The trick is to tilt the keyboard forward, away from you, when seating the keys.  You'll see the spring tilt forward in the barrel when you do this.

Thanks, this proved to be the key.  I held the keyboard vertical top/logo side facing downward while installing the keycaps and everything lined up fine.

The other problem I had was with the + and Enter keys on the numpad.  Apparently it matters which way you attach the stabilizer bar.  One end of the stabilizer bar is slightly longer than the other one.  That side needs to attach to the bottom end of the key, otherwise the key will not press down properly.

The Model M is by far the most finicky keyboard I have used (so far).

If you think M's are finicky, don't ever take apart an F.
OG Kishsaver, Razer Orbweaver clears and reds with blue LEDs, and Razer Naga Epic.   "Great minds crawl in the same sewer"  Uncle Rich
Order Form for MDC Mouse Pad
Contact Form for questions

IBM F Revival Services Now with VIDEO