I started out by using one of the fiducials you guys have listed with a pad as a sub-element. However when I started reviewing my PCB with my assembler rep he noticed that their would be a hole in the stencil causing solder paste to be applied to the fiducial. I changed to the pin with zero size hole and the paste is naturally gone. However now I have fiducials on both sides with a big hole in my GND plane because of the clearance to the GND polygon. So, is their a way to get PCB to not put paste on a pad so I can go back to having a fiducial on one side of the board?
Thanks, Jeff On 9/11/06, Phil Taylor <[EMAIL PROTECTED]> wrote:
> standard libraries? Has anyone posted fiducials that I could use as a > starting reference? > > Thanks a lot for your assistance guys. > Jeff Jeff, Here are three fiducial footprints. First is a top-layer pad only. Second is a 50 mil pad with a 100 mil clearance circle and a 100 mil soldermask opening. Third is the same as second but with a 175mil clearance circle. This is the one I see the most on other peoples' pcbs. The 2nd and 3rd version appear on all layers. Please let me know if they work out for you. phil _____ Element[0x0 "FIDUCIAL__pad-50-100-100.fp" "" "" 0 0 0 0 0 100 0x0] ( Pad[0 0 0 0 5000 5000 10000 "" "1" 0x000] ) _____ Element[0x0 "FIDUCIAL__pin-50-100-100.fp" "" "" 0 0 0 0 0 100 0x0] ( Pin[0 0 5000 5000 10000 0 "" "1" 0x001] ) _____ Element[0x0 "FIDUCIAL__pin-50-175-100.fp" "" "" 0 0 0 0 0 100 0x0] ( Pin[0 0 5000 12500 10000 0 "" "1" 0x001] ) Element[0x0 "FIDUCIAL__pad-50-100-100.fp" "" "" 0 0 0 0 0 100 0x0] ( Pad[0 0 0 0 5000 5000 10000 "" "1" 0x000] ) Element[0x0 "FIDUCIAL__pin-50-100-100.fp" "" "" 0 0 0 0 0 100 0x0] ( Pin[0 0 5000 5000 10000 0 "" "1" 0x001] ) Element[0x0 "FIDUCIAL__pin-50-175-100.fp" "" "" 0 0 0 0 0 100 0x0] ( Pin[0 0 5000 12500 10000 0 "" "1" 0x001] ) _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
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