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Key cap dimensions/sizing

Posted: 08 Jul 2012, 05:14
by The_Beast
Does anyone have autocad, inventor, pdf..... plans/dimensions for key caps? Outside dimensions aren't super important right now (they might later), I'm more interested in the stem and it's placement.



Thanks

Posted: 08 Jul 2012, 05:27
by asdf
still looking but there's this in the mean time http://www.cherrycorp.com/english/switches/key/mx.htm

Posted: 08 Jul 2012, 05:41
by ripster
Yeah, I posted slider dimensions at Geekhack.

Or do you mean keycap cruciform dimensions?

I got those too.

Why are you asking?

Posted: 08 Jul 2012, 07:47
by The_Beast
All the dimensions of a key cap would be helpful. Inside, outside, cruciform whatever I can get. Tollerance would also be pretty helpful.

Why? I'm thinking of getting/buying/building a CNC router/mill and custom caps would be pretty tight to mill out.

Posted: 08 Jul 2012, 10:50
by damorgue
Mills small enough to cut the + in the stem are expensive and break often. A rule of thumb is that the length of the tool should not exceed 4*the diameter. I have some step-files for cnc if you want them later on.

Posted: 08 Jul 2012, 16:07
by ripster
Yeah, the Zinc Duckies were crap.
Image

Anyhoo I back up images because Geekhack does not and SOMEBODY has to do it.
Image

Apologies for Signature Plastics using Imperial Measurements. They are in the boonies in Washington state among the Sasquatches and Survivalists.

Other piece of trivia is the Cherry MX SLIDER cruciform is thicker in the horizontal. In other words when pulling keys wiggle Left/Right for maximum efficiency. Wiggle. Wiggle. Wiggle.

Posted: 08 Jul 2012, 22:41
by The_Beast
damorgue wrote:Mills small enough to cut the + in the stem are expensive and break often. A rule of thumb is that the length of the tool should not exceed 4*the diameter. I have some step-files for cnc if you want them later on.
I was thinking of milling stabilized wood, which I've heard is very similar to milling plastic. As for milling the stem, I was thinking many light passes at a slowish feed rate.
ripster wrote:Yeah, the Zinc Duckies were crap.
Image

Anyhoo I back up images because Geekhack does not and SOMEBODY has to do it.
Image

Apologies for Signature Plastics using Imperial Measurements. They are in the boonies in Washington state among the Sasquatches and Survivalists.

Other piece of trivia is the Cherry MX SLIDER cruciform is thicker in the horizontal. In other words when pulling keys wiggle Left/Right for maximum efficiency. Wiggle. Wiggle. Wiggle.
Thanks rip

Posted: 08 Jul 2012, 23:06
by geotang
Wooden keycaps :o
Looking forward to how well they turn out.

Posted: 08 Jul 2012, 23:42
by ripster
PieceOcake.

Sanding solves all mistakes.

Posted: 09 Jul 2012, 00:47
by The_Beast
geotang wrote:Wooden keycaps :o
Looking forward to how well they turn out.
Don't get too excited, it's all just vaporware right now

ripster wrote:PieceOcake.

Sanding solves all mistakes.
Do you do any wood working? Sanding just masks mistakes