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	Mon, 27 Jul 2015 10:47:07 -0700 (PDT)
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Date:	Mon, 27 Jul 2015 09:47:07 -0800
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Subject:	Re: [geda-user] Component Cut-outs in PCB
From:	"Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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On Mon, Jul 27, 2015 at 5:43 AM, Mitch Davis
(mjd+geda-user AT hackvana DOT com) [via geda-user AT delorie DOT com]
<geda-user AT delorie DOT com> wrote:
>
> 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.

I use pcb-pool.com, for (admittedly not too tiny) cutouts I've just made
silk lines and write "Cut Out" in text on the area to go away and they've
been fine with it.

Britton

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