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Date: Wed, 29 Jul 2015 03:00:24 GMT
From: falcon AT ivan DOT Harhan DOT ORG (Spacefalcon the Outlaw)
Message-Id: <1507290300.AA05734@ivan.Harhan.ORG>
To: geda-user <geda-user AT delorie DOT com>
Subject: Re: [geda-user] Converting footprints from PADS to PCB
Reply-To: geda-user AT delorie DOT com

Erich Heinzle wrote:

> My plan for cloning a land pattern will be to break the big gerber
> generated footprint into elements, and then select the elements of interest
> and save them to their own footprint.

Ahh, "the elements of interest" - let me tell you what they are. :)
Look at this PNG:

ftp://ftp.freecalypso.org/pub/GSM/GTA02/modem-hw/modem_comp_placement.png

It shows all of the PCB elements in the GSM modem section of interest
to my FreeCalypso project.  If we are going to redo the bulk of the
layout (aside from the footprints) anew following the quadband plan
(the arrangement would be totally different from the triband one
depicted here), the following footprints from Openmoko's layout would
be useful to reuse:

U2000, U1001, U1002		(BGAs)
U201, U301			(RF chips)
Q401, R1016/R1017, X301, D301	(misc)

The rest are either plain vanilla 0402 etc, or components specific to
Openmoko's triband design which won't be applicable to a quadband
redesign.

The correct gerber to use for the copper parts of these footprints is
BOTTOM.pho.  The one named SMD_BOTTOM.pho is for the solder paste
stencil, so don't use that one for the footprint copper.  And because
it's the side which Openmoko designated as the bottom, everything is
mirrored - beware!

Thanks a lot for all your work!

SF