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Date: Wed, 25 Jul 2012 09:05:52 -0700
Message-ID: <CA+GuLwe5sPPWJQAQtX2mYTFYz5Dnt_wPy42ywZnY37dagsrEHQ@mail.gmail.com>
Subject: [geda-user] how to use "clearance" and mask in pcb footprint
From: Ram Bhamidipaty <rambham AT gmail DOT com>
To: geda-user AT delorie DOT com
Content-Type: text/plain; charset=ISO-8859-1
Reply-To: geda-user AT delorie DOT com

I am trying to create a foot print for a CUI PJ002B power jack. This is what
I have so far:


Element[0x00000000 "CUI PJ002B Power Jack" "" "" 1mm 1mm 0 0 0 100 0x00000000]
(
        Pin[ -13mm      0mm   4.7mm 0.5mm 4.2mm 3.5mm "" "1" 0x00000001]
        Pin[  -7mm      0mm   4.7mm 0.5mm 4.2mm 3.5mm "" "2" 0x00000001]
	Pin[ -10.7mm -4.7mm   4.7mm 0.5mm 4.2mm 3.5mm "" "3"  0x00000001]
	ElementLine(   0mm  -7.5mm   0mm    5mm 0.1mm  )
	ElementLine(   0mm  -7.5mm -18mm -7.5mm 0.1mm  )
        ElementLine( -18mm  -7.5mm -18mm    5mm 0.1mm  )
	ElementLine(   0mm     5mm -18mm    5mm 0.1mm  )

        ElementLine( -2mm -2mm  -2mm  2mm 0.1mm )
        ElementLine( -2mm -2mm   0mm -2mm 0.1mm )
        ElementLine( -2mm  2mm   0mm  2mm 0.1mm )

        ElementLine( -9mm -5mm  -6mm -5mm 0.1mm )
        ElementLine( -6mm -5mm  -6mm -2mm 0.1mm )
)

I'm pretty sure the way I am doing the pins with the mask and clearance
values is wrong. Are there some general rules I should follow for solder mask
and clearance values? Are clearance and mask values dependent on the
board fab rules?

Also this particular part has rectangular pins: 1mm x 3.5mm and 1mm x 3mm
from earlier emails folks are using pins to handle this - how much
larger does the
pin hole need to be?

Thanks for any help.

-Ram