On Tue, Jun 14, 2016 at 01:53:09PM +1000, Cirilo Bernardo wrote: > Hi folks, > > Some assembly houses prefer to have a Pad1 location in addition > to the part centroid location; this makes the orientation of the > component unambiguous and can help in cases where the user's > footprint doesn't align with the tape orientation of a component. > Would this be a useful addition to the placement file or are there > any objections to it?
IIRC the 'pad 1' position was already requested in the past. Of course *in addition* to the centroid. The real issue is determining *which* is the pad 1! from 'easy' case like alu capacitors (is 1 the positive?), diodes (but then there is no single convention, 1 is A o K?) to some rather esoteric ones (partially populated BGA, pin 1 is maybe A2). The correct way to handle this would be to simply add an attribute to the pretty schema saying the identity of pin 1... -- Lorenzo Marcantonio CZ Srl - Parma
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