The bearing ball must be touching directly the table (or some big pad (cushion) put on the table) to provide easy movement. Your design provides easy movement only withing the cushion area which is drawn about the same size as the whole device for one hand. Also the balls must be able to move around in the device if you want to use only rolling friction. Your proposal does not handle this at all.
But if you are lazy to move your hands around then you can also get a keyboard which does not require any palm movement while typing, like e.g. K80CS: https://deskthority.net/viewtopic.php?p=250605#p250605
The goal is to be able to slide your palm about 1 Inch in all directions...If that is the goal then the lower part must be bigger by 1 inch in all directions compared to the upper part. The pictures do not indicate that at all.
If that is the goal then the lower part must be bigger by 1 inch in all directions compared to the upper part.
The pictures do not indicate that at all.
Also the picture indicates that the ball sits in the upper bearing depression:
1) if the depression is simple spherical cutout then you will get sliding friction there and it is likely to be too much for smooth motion (even if it is made from a low friction material like e.g. teflon)
2) if the depression is a groove (shown from the direction of the groove ... therefore seen on the picture as a simple spherical cutout) then it will allow easy movement only in one direction (the direction of the groove)
I have also had a pair of "ErgoRest": rests on mechanical arms clamped to the desk's edge...
I pointed out other options (magnetic levitation, ...).
The cutout in my drawing is cylindrical, and supposed to hold split spherical bearing seats...Probably not. There will be friction between the seat and the ball. I doubt this is better than just two simple planar surfaces from some low friction material (e.g. teflon). No need to complicate it with balls when you are not using them to eliminate friction on the load bearing surfaces.
This way the ball wont ride on the base material, and we wont need super precise spherical cutouts.
From what I remember, these split seats also allow adjustment of the friction as they are set in a thread.
But it was a long ago I used these the last time, so I could be wrong here. Wouldn't that allow for smooth motion?
Please elaborate the magnet arrangement... ^^:I do not know how to do it exactly. I know only that it can be done for sure since maglevs and linear motors exist. It is possible this cannot be done well only passively (only as an a suitable arrangement of permanent magnets). Active control with linear motors may be needed.
Better to keep pressure (forces per unit area) smaller overall by two simple planar surfaces from a low friction material.
That’s a brilliant concept! Honestly, the "hovering while supported" feel is a game-changer for split boards.
I actually bought a very similar sliding wrist rest a while ago. It’s also split and has a silicone pad that tilts and supports your wrist at any angle, and it even has RGB built-in.
Show Image(https://geekhack.org/index.php?action=dlattach;topic=126762.0;attach=317705;image)
That product actually seems to support a wrist (instead of the palm near the wrist) on the picture.
Does anybody use such a thing? No problems with it?
I mean it looks to me a bad idea since veins are near the skin there and will be more restricted by pressure from the support. Supporting a palm (near wrist) is not an issue since it has evolved to withstand pressure there. Our body has a natural "padding" there.
The photographer, as well as the model, might not know how the products works...Well, those images are quite a new level of cringey :eek:
(Attachment Link) (Attachment Link)
Spot on, that's exactly the one!That’s a brilliant concept! Honestly, the "hovering while supported" feel is a game-changer for split boards.
I actually bought a very similar sliding wrist rest a while ago. It’s also split and has a silicone pad that tilts and supports your wrist at any angle, and it even has RGB built-in.
Thanks for ya kind words...
Is your wrist-rest this thing by any chance?
(Attachment Link)
Are you willing to share your experience?
Is the range of motion good enough?
Is the addition of tilting helpful?
Spot on, that's exactly the one!
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It's definitely worth a try!
I’d highly recommend going with the black version. I bought the white one before, and it had some tiny black specks and impurities on the surface—probably from dust or debris getting into the mold during production. I actually had to exchange it a few times just to finally get a white one that was basically flawless.Spot on, that's exactly the one!
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It's definitely worth a try!
Thanks for your response...
I gonna order one for testing!