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From: | "Mitch Davis (mjd+geda-user AT hackvana DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> |
Date: | Mon, 27 Jul 2015 23:43:51 +1000 |
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Subject: | Re: [geda-user] Component Cut-outs in PCB |
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--001a11341b46626a0d051bdb8cfb Content-Type: text/plain; charset=UTF-8 On Thu, Jul 23, 2015 at 4:30 AM, Stephen Besch <sbesch AT buffalo DOT edu> wrote: > > First off, every board shop that I deal with want cut-outs in a separate > gerber file. How odd. I ask my customers to put cut-outs either in the outline file (.gm1 or .gko) or do it as a non-plated slot, along with non-plated holes (-NPTH.txt). I wrote about it here: http://hackvana.blogspot.com.au/2014/02/slots.html Gerber/Excellon are formats which exist to convey info from CAD to CAM. In the words of Karel Tavernier (who is the boss of Ucamco, the custodian of Gerber), "The Extended [Gerber] format enables clear, unambiguous communication between designer and CAM engineer". This is a really interesting article, especially the first page: http://www.ucamco.com/files/downloads/file/22/Kick_Starting_a_Revolution_IPC-2581_Meets_Gerber.pdf IMO it's a mistake for us to second-guess how a board shop actually makes the boards. It serves as a specificationm and should just describe what we want. I really can't understand that a company would require us to do their CAM job work for them. Sigh. Mitch. (thanks to xmd for writing the pcb patch which adds --name-style hackvana) --001a11341b46626a0d051bdb8cfb Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <br><div class=3D"gmail_quote">On Thu, Jul 23, 2015 at 4:30 AM, Stephen Bes= ch <span dir=3D"ltr"><<a href=3D"mailto:sbesch AT buffalo DOT edu" target=3D"_b= lank">sbesch AT buffalo DOT edu</a>></span> wrote:<br><blockquote class=3D"gmai= l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left= :1ex"><br>First off, every board shop that I deal with want cut-outs in a s= eparate gerber file.</blockquote><div><br>How odd.<br><br>I ask my customer= s to put cut-outs either in the outline file (.gm1 or .gko) or do it as a n= on-plated slot, along with non-plated holes (-NPTH.txt).=C2=A0 I wrote abou= t it here:<br><br>=C2=A0 <a href=3D"http://hackvana.blogspot.com.au/2014/02= /slots.html">http://hackvana.blogspot.com.au/2014/02/slots.html</a><br><br>= Gerber/Excellon are formats which exist to convey info from CAD to CAM.=C2= =A0 In the words of Karel Tavernier (who is the boss of Ucamco, the custodi= an of Gerber), "The Extended [Gerber] format enables clear, unambiguou= s communication between designer and CAM engineer".<br><br>This is a r= eally interesting article, especially the first page:<br><br>=C2=A0 <a href= =3D"http://www.ucamco.com/files/downloads/file/22/Kick_Starting_a_Revolutio= n_IPC-2581_Meets_Gerber.pdf">http://www.ucamco.com/files/downloads/file/22/= Kick_Starting_a_Revolution_IPC-2581_Meets_Gerber.pdf</a><br><br>IMO it'= s a mistake for us to second-guess how a board shop actually makes the boar= ds.=C2=A0 It serves as a specificationm and should just describe what we wa= nt.=C2=A0 I really can't understand that a company would require us to = do their CAM job work for them.=C2=A0 Sigh.<br><br>Mitch.<br><br>(thanks to= xmd for writing the pcb patch which adds --name-style hackvana)<br><br><br= ></div></div> --001a11341b46626a0d051bdb8cfb--
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