All:

    As a SMT subcontractor, we see CAD files from many different sources.
An item of frustration for us is how some customers assign a Pin 1
designator to diodes. Primarily, we see Pin 1 being assigned to Cathode and
Pin 2 to Anode. For those customers who use Pin 1 to anode, we manually
rotate the part within our CAM system to stay consistent with what our
operators typically see on their visual aids. This is both cumbersome and
inefficient.
   I don't believe (or should I?) that there is an industry standard that
addresses this, but is there some type of defacto standard that exists
which I can use as evidence to some of our customers that they should
consider using the 'Pin 1 to cathode concept'? Thanks.

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