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Date: Fri, 27 Jul 2012 09:31:37 +0200
From: Gabriel Paubert <paubert AT iram DOT es>
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Subject: Re: [geda-user] Odd Shape Board Outline - HOW?
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On Thu, Jul 26, 2012 at 11:46:52PM -0400, Phil Taylor wrote:
> On 7/25/2012 11:04 PM, Edward Comer wrote:
> >All of my previous boards have been rectangles. Now, I have an odd board
> >outline - a 60mm circle with a 16.5mm hole in the center. I can
> >accomplish using the ARC tool on my outline layer. However, this board
> >needs a 4.5mm x 2.25mm notch in the inner hole - looking a little like a
> >doughnut with a fat keyhole in the middle. My fab house says that they
> >can make it if I can draw it on the outline layer.
> 
> I will often write out the outline-layer for a board using a text
> editor.  I then manually paste it into the .pcb file.  When you open
> it in PCB it's right there.
> 
> If it's an exceeding complex outline, you may want to use some kind
> of CAD program to get the coordinates for your lines.  Most of the
> PCBs I've done (including some elliptical boards, and several
> including curved/round edges) have been drawn on a sheet of paper
> and typed in using gedit.
> 
> You will do a little bit of math to get the intersection of your
> arcs and your lines, but by doing it by hand assures that the
> endpoints will be coincident.

Actually when I have this kind of problems I typically use
libreCad (ex QCad).

	Gabriel