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Message-ID: <1431505943.2980.40.camel@cam.ac.uk>
Subject: Re: [geda-user] Using gerbv for assisting manual placement tasks
From: Peter Clifton <pcjc2 AT cam DOT ac DOT uk>
To: geda-user AT delorie DOT com
Date: Wed, 13 May 2015 09:32:23 +0100
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On Wed, 2015-05-13 at 10:25 +0300, Sergey Alyoshin
(alyoshin DOT s AT gmail DOT com) wrote:
> On Tue, May 12, 2015 at 2:21 AM, Peter Clifton <pcjc2 AT cam DOT ac DOT uk> wrote:
> > Anyone else think this might be useful to them...
> > Anyone already have a better solution?
> 
> I was thinking about it for quite a time. The difference is to
> represent elements data in table with filtering and sorting for each
> column, so it is possible to show (highlight) only filtered or
> selected elements.
> 
> I don't see the necessity  to mark or save elements as placed.

Oh.. it helps.

The board I was assembling had 333 SMT components (on the top side). As
the parts may have to be placed in a favourable order (probably shortest
first by height), the BOM list order may not match the placement order.

Being able to tick off parts that I'd completed was invaluable.


> Additional proposal is to add directory with elements assembly views
> in Gerber format for common elements (with possibility for user to
> override it) and show it instead of cross. The problem it rotation and
> place point integrity for this views.

I'm adding first-class rotation info to PCB to support 3D models, so
eventually we can export this info directly with no guessing.

(Currently IIRC, PCB guesses an orientation of 0, 90, 180 or 270
depending on the Pin1 location of the part).

I've discovered I need to add a way to specify paste-dispensing
information for a part / footprint though..

For these boards I hit each pad centroid with a dot (based on the solder
paste stencil gerber file), but this was not always the optimal solder
dot location. (In part this was due to some non-ideal pad shapes in the
original artwork).



-- 
Peter Clifton <peter DOT clifton AT clifton-electronics DOT co DOT uk>

Clifton Electronics