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geekhack Community => Keyboards => Topic started by: N8N on Sun, 17 July 2011, 19:20:17

Title: Just had a dumb idea - plate mounted MX's pinging
Post by: N8N on Sun, 17 July 2011, 19:20:17

Was reading a long thread that included a discussion of pinging switches - has anyone ever tried putting a couple dots of Dynamat or similar damping type material on the metal plate?

The only plate mounted keyboards I have are Alps, and none of them ping (although the SIIG is deafeningly loud...)

I'm just curious if damping the plate would keep the vibration of a keystroke from propagating to nearby switches (which is one theory that I saw put forward.)

Title: Just had a dumb idea - plate mounted MX's pinging
Post by: BiNiaRiS on Sun, 17 July 2011, 20:17:48

Theory makes sense.

Plus, half of a square foot of Dynamat on your keyboard should net you an easy 6whp.

Sent from my EVO

Title: Just had a dumb idea - plate mounted MX's pinging
Post by: Waterdr1nker on Sun, 17 July 2011, 20:17:50

Someone at this forum used expanding foam which worked for him. Google "majesfoam" and you'll find it.

Title: Just had a dumb idea - plate mounted MX's pinging
Post by: sordna on Sun, 17 July 2011, 20:53:43

Good theory. Like a reverb unit, I do believe that *lots* of springs get involved because they resonate around the same frequency, so any one's ping will excite the others a well.
Anyway, here is the radical mod that successfully dampened the noise:

http://geekhack.org/showthread.php?18886-Ringing-Filco-Majestouch-2-Plus-Expanding-Polyurethane-Foam

Title: Just had a dumb idea - plate mounted MX's pinging
Post by: greyhounds on Sun, 17 July 2011, 22:52:17

N8N -

I recommended Dynamat as well when I read that thread. I think you'd just have to cut some strips and stick it on teh plate and it'd change the mass enough to reduce the pink. Alot cleaner than expanding foam.

Are you a car guy as well?