kicad-developers team mailing list archive

[jean-pierre charras - INPG <jean-pierre.charras@...>]

Dick Hollenbeck a écrit :
> Jean-Pierre,
>
> The attached board file is a modification of kicad's demo
> "sonde-xilinx. brd", and then fed through the specctra export and then
> imported back in. (So the interface is now largely done and I am mostly
> going back to work on my boards.)
>
> However, if you load this attached board and click on the ratsnest
> button, you will see that freerouter is routing tracks to the center of
> the "oval pads with offset", not to the through hole center. So the
> ratsnest is catching this and thinking it is an unrouted pin/pad.
>
> I am not inclined to work on this particular issue, but I wanted to
> point it out in case you wanted to try and change what we consider the
> "connection point" within the pad. (We have had a discussion like this
> before. It is very confusing for a user to see a track go to a pad
> visually and then have it not be recognized as "connected" by Kicad.
> Maybe other software does this too?)
>
> If we were to change what the "connection point" is (and still make it
> be a "point on point" rather than a more tolerant overlap), we would
> probably have to allow either the old connection point or the new
> connection point when ratsnest testing of "oval pads with offsets".
>
> Please give this some thought. I see 3 courses of action we could take:
>
> 1) none.
>
> 2) allow two connection points for "oval pads with offset" only.
>
> 3) become tolerant of track on pad overlaps generally according to some
> more tolerant but not so execution expensive algorithm.
>
> FYI,
>
> Dick

Of course only option 3 is acceptable.
I'll start work on it, because i believe enhancements about copper areas 
will also need tolerant track connections.

--
Jean-Pierre CHARRAS
Maître de conférences
Directeur d'études 2ieme année.
Génie Electrique et Informatique Industrielle 2
Institut Universitaire de Technologie 1 de Grenoble
BP 67, 38402 St Martin d'Heres Cedex

Recherche :
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46, Avenue Félix Viallet
38031 Grenoble Cedex