gEDA-dev: PCB - XY values of centrioid in BOM/DXF exproter (wasgEDA-user: PCB Element for a Molex 71661-2068?)

[Timmerman, Bert]

Hi John,

-----Original Message-----
From: geda-dev-bounces at moria.seul.org
[mailto:geda-dev-bounces at moria.seul.org] On Behalf Of John Griessen
Sent: Thursday, March 08, 2007 4:31 PM
To: gEDA developer mailing list
Subject: Re: gEDA-dev: PCB - XY values of centrioid in BOM/DXF exproter
(wasgEDA-user: PCB Element for a Molex 71661-2068?)

Bert Timmerman wrote:
> The problem lies in assymetrical [PGA, BGA, SIL, TO, connectors, ...]
> packages where the centroid (a calculated average X,Y-values of the
actual
> existing pins/pads on the package) does not coincide with the center
of
> gravity of the package 

[jg]How about pragmatically defining the COG centroid as the average of
the 
corner pins/pads?

[bt]Very well for double symmetrical packages like most RES, CAP, DO,
DIP, QFN, SO, ... not for single symmetrical packages like TO-* and most
connectors.

> whether anyone is actually using
> the XY file for "pick and place" of components ?
> 
[jg]We will.  In a while...  Soon enough.

[bt]Yes, when (and not if) gEDA becomes _the_ mainstream EDA software on
the windoze platform  ;-)

Kind regards,

Bert Timmerman.