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From: "Peter Clifton (petercjclifton AT googlemail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date: Fri, 13 Jan 2017 08:31:08 +0000
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Subject: Re: [geda-user] thru hole slots in PCB
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Nothing automatic, you have to create a slots layer and draw the shape.
Your fab house will probably cope if you send them a note of the Layer
usage.

Means you end up more in the territory of pasted layout fragment, not a
true footprint.

In the footprint (might as well use one to create the pads for the netlist,
silk etc...), create an identically named pad top and bottom of the board.

I've done this before with just a complicated outline layer. The fab I
often use will figure out if a slot is supposed to be played or not
depending on whether it cuts into copper.

(I got the impression they don't like routing across copper for some
reason, perhaps it gums up the cutter or creates burrs.

Peter

On 13 Jan 2017 05:11, "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.

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<div dir=3D"auto">Nothing automatic, you have to create a slots layer and d=
raw the shape. Your fab house will probably cope if you send them a note of=
 the Layer usage.<div dir=3D"auto"><br></div><div dir=3D"auto">Means you en=
d up more in the territory of pasted layout fragment, not a true footprint.=
<br><div dir=3D"auto"><br></div><div dir=3D"auto">In the footprint (might a=
s well use one to create the pads for the netlist, silk etc...), create an =
identically named pad top and bottom of the board.</div><div dir=3D"auto"><=
br></div><div dir=3D"auto">I&#39;ve done this before with just a complicate=
d outline layer. The fab I often use will figure out if a slot is supposed =
to be played or not depending on whether it cuts into copper.</div><div dir=
=3D"auto"><br></div><div dir=3D"auto">(I got the impression they don&#39;t =
like routing across copper for some reason, perhaps it gums up the cutter o=
r creates burrs.</div><div dir=3D"auto"><br></div><div dir=3D"auto">Peter</=
div></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">O=
n 13 Jan 2017 05:11, &quot;John Griessen (<a href=3D"mailto:john AT ecosensory=
.com">john AT ecosensory DOT com</a>) [via <a href=3D"mailto:geda-user AT delorie DOT com=
">geda-user AT delorie DOT com</a>]&quot; &lt;<a href=3D"mailto:geda-user AT delorie.=
com">geda-user AT delorie DOT com</a>&gt; wrote:<br type=3D"attribution"><blockquo=
te class=3D"quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pa=
dding-left:1ex">Is there a way to get a smooth slot with PCB? (A non-circul=
ar plated through hole -- a round ended slot).<br>
<br>
Is there a quick approximation to do with overlapping vias?<br>
<br>
What I can find on websites says no, just use a bigger holed via for a meta=
l tab solder hole.<br>
</blockquote></div><br></div>

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