The current resolution of pcb being 0.01 mills which translates to 254 nano meters (~1/4 of a thousandth of a mm) should meet the requirements for printed circuit boards for some time (metric or english). And yes being able to create/translate foot prints in metric units to pcb units would be usefull. This doesn't have to be a built in pcb function it could be a foot print generator capability. An argument for having it is to reduce the errors caused by humans.
Steve Meier Ben Jackson wrote: > As I mentioned in an earlier mail, the QFP208_28 footprint I used for > my board I later found to have 1mil spacing depsite being in the .01mil > format. Since it's a metric footprint (0.65mm pitch) the pins vary in > both width and spacing along each row. This isn't fatal, certainly, but > it's not ideal. > > I was considering how to detect this problem automatically. I would be > fairly easy to identify parts with 1mil accuracy which also have 'several' > pins in a row with varying pitch and/or width. It could be done in a > script, or within PCB. > > Would anyone be interested in seeing this detected automatically somehow? > I was thinking about flagging it in the element picker, but that's not > typically how elements get into a PCB. It could also be part of the > DRC, or it could be a separate report. > > _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user