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Date: | Sun, 6 Apr 2014 13:23:16 +0200 |
From: | Gabriel Paubert <paubert AT iram DOT es> |
To: | geda-user AT delorie DOT com |
Subject: | Re: [geda-user] Cooper arcs in footprint |
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On Sun, Apr 06, 2014 at 02:12:56AM +0200, Stefan Salewski wrote: > On Sat, 2014-04-05 at 19:49 -0400, Evan Foss wrote: > > I had this problem last year. I was trying to do a footprint for a PCB > > mounted microphone. In the end I had to approximate it by using a lot > > of short strait traces at angles. > > Indeed KiCad users had that problem, I guess they still have it. > KiCad had no support for copper arcs at all about one year ago! > > For your microphone there is a simple solution -- ad a copper arc in PCB > editor after you had positioned the footprint with missing arc. > > I still wonder why KiCad has avoided copper arcs so long, and why PCB > avoided copper arcs in footprints. I think gerber formats supports arcs. Indeed, but it does not support ellipses: http://www.ucamco.com/files/downloads/file/81/the_gerber_file_format_specification.pdf > One problem with arcs is: If we have stretched arcs, DRC may be much > more difficult -- I have to admit that I have no idea how to test > stretched arcs for intersection with other elements (fast). Another > problem can be autorouting when we have arcs on the board -- for > geometrical and topological routers there should be some difficulties. Never used an autorouter myself, but they are quite useless for high frequency/RF work. Regards, Gabriel
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