Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

[Steven Michalske <smichalske@xxxxxxxxx>]

On Jun 4, 2009, at 7:20 PM, John Coppens wrote:

> On Thu, 4 Jun 2009 17:15:34 -0400
> Rob Butts <r.butts2@xxxxxxxxx> wrote:
>
>> I print out the etch pattern to make a home-made card the pins don't
>> line up.
>
> How are you printing? Using postscript? Or via another program - maybe
> GIMP or so? Does that program have a fit-to-page function, which might
> change the scale? Are you printing a letter format PCB onto an A4  
> page?
> Think along those lines.

I have a printer that will do this scaling too.  Times this hits me as  
well.

> I've hit my head many times because some of the intermediate steps  
> would
> try to be too intelligent. If all that fails, make a 1" by 1" square
> (or so) and look at each step if the size remains 1000x1000 mils. Some
> programs that change postscript to bitraster to print it, take into
> account screen resolution (80ppi/90ppi etc), and mess things up.
>
> John
>
>
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