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

[Gabriel Paubert]

On Thu, Mar 08, 2007 at 12:39:42PM -0600, John Griessen wrote:
> Timmerman, Bert wrote:
> 
> >[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.
> 
> OK then, still on the pragmatic tack, why not use silk for a centroid 
> calculation?  Find the most extreme corners of  (silk OR pins OR pads).
> 

What does OR mean in that context? The bounding box?

I strongly suspect that, for example, pick and place machines want the 
same centroid for SOT23 with 5 or 6 pins, it's not an additional soldering 
point in the middle of a row that will affect them: they are delivered in 
identical reels AFAICS.

	Regards,
	Gabriel