I have
seen this before. Try pulling the tape back by hand and watch closely.
There may be enough static from the tape seperation to lift the part up and flip
over.
Charles Caswell
Dear
Technet folks,
I am obviously not
following the search protocol properly for the information that I need, so
I'll just post my Q's anyway. First question relates to a problem I'm
experiencing with some SOT 23's that get placed upside. This occurs on
multiple machines/feeders, and my hunch is that the component somehow is
flipping upside down in the pockets while in the feeder. Anyone have
experience with this problem? I did change the laser centering
parameters so that it gets rejected now if it's upside down, but I'd like to
figure out the root cause.
My
second question is regarding QFP components in trays or tape & reel - is
there a standard or recommendation for putting fine pitch QFP's in trays
verses tape & reel? In other words, are 25 or 20 mil pitch gull wing
QFP's OK to be supplied in tape & reel, or should they be in trays to
avoid lead damage? We always get these components in trays, and I
figured it was to protect the leads, but now I wonder if tape & reel is
fine. I'm sure it depends somewhat on the feeders, and their ability to
deliver the components without damaging the leads. Any advice will be
greatly appreciated.
Howard
Watson
SMT Manufacturing Engineer
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