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	Fri, 13 Jan 2017 08:21:42 -0800 (PST)
Date:	Fri, 13 Jan 2017 17:21:36 +0100
From:	"Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] thru hole slots in PCB
Message-Id:	<20170113172136.5308f28a14d94c870a0c5f92@gmail.com>
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On Thu, 12 Jan 2017 23:07:18 -0600
"John Griessen (john AT ecosensory DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> wrote:

> Is there a way to get a smooth slot with PCB? (A non-circular plated through hole -- a round ended slot).
> 
> Is there a quick approximation to do with overlapping vias?
> 
> What I can find on websites says no, just use a bigger holed via for a metal tab solder hole.

Someone further down the thread suggested you have to create a slots layer and draw the shape.


If it was possible to draw board outline as a solid polygon and make cut out then board should be well defined.

Even though board is defined as a solid shape as a real board is it may still of course make sense to show only outline, maybe even in gerber. It is claimed here https://sourceforge.net/p/gerbv/feature-requests/89/ G85 is used to define slots in Excellon drill file but for CNC g-code is a boring cycle which I am not totally sure what it do.

I know Igor have make some work in pcb-rnd to make layer more general but have not yet had time to look at it.


Nicklas Karlsson

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