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Subject:	Re: [geda-user] thru hole slots in PCB
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From:	"John Griessen (john AT ecosensory DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Message-ID:	<f2996d53-8743-368a-0c4b-688b13678905@ecosensory.com>
Date:	Sun, 15 Jan 2017 10:54:55 -0600
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On 01/14/2017 07:09 PM, Mitch Davis (mjd+geda-user AT hackvana DOT com) [via geda-user AT delorie DOT com] wrote:
> Let's say I call my script with a diameter of 0.0315 (0.8mm, the diameter of the tool my suppliers use for slots).
>
> It turns this:
>
> X14150Y22220
> X14150Y25970
> T02
> X5831Y6845
> X5831Y6095
> X5024Y4579
> X4274Y4579
> X3469Y6095
> X3469Y6845
> T03
> X3469Y6470
>
> into this:
>
> X14150Y22220
> X14150Y25970
> T02
> X5831Y6845G85X5831Y6095
> X5024Y4579G85X4274Y4579
> X3469Y6095G85X3469Y6845
> T03
> X3469Y6470

What if you have some other guide holes at .8mm?

What would you do to stop the script from acting on them?

Is it OK to use a size for the slot end holes that is impossible
for practical boards, such as 0.05mm, then run the G85 script, then
post process the impossible size back to 0.8mm for instance?

I guess another way would be to not use 0.8mm for any holes
that are specified that size, and use 0.805mm instead.
Fabs would just ignore the 3rd digit and choose an actual drill size
based on their process for plated thru holes.

I just made a footprint for a microUSB type AB jack that would use this.
And more coming.

-- 
John Griessen -- building field gear for biologists
Ecosensory  Austin TX  ecosensory.com

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