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Date: Thu, 27 Aug 2015 11:56:42 -0400
Message-ID: <CAM2RGhTPqz8tfSs==s2LoCuHzrrcx5t+GWb3iDPMm6U-UvwpEA@mail.gmail.com>
Subject: Re: [geda-user] [pcb-rnd] parametric footprint: dimensions, qf(),
 qfn() and tqfp()
From: "Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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On Thu, Aug 27, 2015 at 11:56 AM, Evan Foss <evanfoss AT gmail DOT com> wrote:
> On Thu, Aug 20, 2015 at 6:42 PM,  <gedau AT igor2 DOT repo DOT hu> wrote:
>> Hi all,
>>
>> I've implemented two major features in the parametric footprint support in
>> pcb-rnd (and in the online version).
>>
>> The preview tool, fp2anim, can display dimensions on the annotation layer.
>> This is useful for checking whether a footprint really matches the
>> datasheet. Details:
>> http://repo.hu/projects/pcb-rnd/devlog/20150820a_dimensions.html
>>
>> The more important feature is a new class of footprints. There is a low
>> level, generic, but complicated to use qf() which should be able to generate
>> anything that has evenly spaced pads around a rectange.
>>
>> There are frontends to qf(), called qfn(), tqfp() and lqfp(). These
>> generators are very easy to use: they have only a few parameters, those that
>> are usually specified among the first lines of a package datasheet. They
>> can't handle special cases, but can safely generate any of the usual
>> QFN/TFQP footprints. Details:
>> http://repo.hu/projects/pcb-rnd/devlog/20150820b_qf.html
>>
>> The online version of the parametric footprint generator is accessible at
>> http://igor2.repo.hu/cgi-bin/pcblib-param.cgi
>>
>> The source is in svn: svn://repo.hu/pcb-rnd/trunk/pcblib/parametric
>>
>> Comments, bugreports, feature requests are welcome.
>>
>> Regards,
>>
>> Igor2
>>
>>
>
> Random thought. A plugin in gEDA that lets you declare a single box

Err I meant option to the footprint generator.

> with one pin as a hole of X type (M3, 4-40, etc) close or loose fit
> and then defines for PCB what the dimensions should be with ether a
> silk screen ring to outline of head diameter or copper under the whole
> area (via).
>
> Right now I have a set of symbols for screws and a set of footprints
> but it would be cool and relatively simple to autogenerate them.
>
> --
> Home
> http://evanfoss.googlepages.com/
> Work
> http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/



-- 
Home
http://evanfoss.googlepages.com/
Work
http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/