FYI gerbv will put the xy file generated by pcb onto your gerbers. Steve
On Sat, Oct 2, 2010 at 10:42 AM, Steven Michalske <[email protected]> wrote: > As you guys continue to debate this... Look at how pcb makes the xyrs data > files. You'll findout that it generates it from the pcb file not the library. > It takes the center of the part from the pins and pads. Then it puts pin 1 > somewhere consistent. See the source for details. > > > > > On Oct 2, 2010, at 5:55 AM, Rick Collins <[email protected]> wrote: > >> At 05:34 PM 10/1/2010, you wrote: >>> Rick Collins wrote: >>> >>> >>If for whatever reason the designer used 2 different footprints for >>> >>the same part occuring >>> >>several times on a board, if the footprints are position/rotation >>> >>inconsisten... >>> > >>> > I have no idea why anyone would do that. >>> >>> Real world example: >>> PhD student Foo designs some super noiseless detector circuit. The >>> measurements turn out a success. Researcher Bar, a long time friend who >>> works on some unrelated project, asks Foo for help to get him started on >>> noiseless detector. PhD Foo gladly provides the schematic and layout. For >>> his project Bar needs to add some minor features to the hardware. Of course, >>> she uses a different local library than Foo ... >>> >>> >>> > Sure the designer can totally screw up a design. >>> >>> I wouldn't call this totally screwed. >> >> If you work on a design and use a different, incompatible library from the >> original without checking for consistency, yes, the designer totally screwed >> up. >> >> I really have no idea how things work in the gEDA/PCB world. With FreePCB >> the library has a default orientation for parts and there is a centroid >> vector to allow the pin 1 orientation to be set compatibly with the Gerber >> files. If you use someone else's design you need to verify that their >> library parts were done correctly or you need to use the same footprints >> which are a part of the layout and so are available. There is no reason to >> screw up something as simple as this. >> >> Oh, I almost forgot, NEVER ask a PhD "anything" to design PCBs. What the >> heck are you thinking??? >> >> Rick >> >> >> _______________________________________________ >> geda-user mailing list >> [email protected] >> http://www.seul.org/cgi-bin/mailman/listinfo/geda-user > _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
