Hi Bob,

Are you sure that the covertape itself ain't sticky?
That's a common problem with the PSA (Cold Seal) process.
I myself prefer components taped in a Hot Seal process.


Best Regards,

Jowan Iven
Process Engineer Manufacturing

Stork Electronics B.V.


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of bbarr
Sent: Friday, March 09, 2001 22:47
To: [log in to unmask]
Subject: [TN] Part Sticking to Top Tape?


I have two different part numbers of a surface mount resistor array that
feeds out of a 12mm tape. This is the problem with both: The back end of the
part wants to ride up with the tape at the tape peel back point. They look
like little soldiers laying on top of the tape. I say the back edge is
riding up because the parts are marking side up and I don't see the part
actually flipping. The part is .200 x .120 so we are not talking a real
small part here. Is this a static problem? Even when the part is in the
pocket just before the tape peel back point it seems like it is attracted to
the tape because the front edge of the part is raised up against the tape.
Anyone else experience this? To get the boards built I fabricated a little
piece of metal and taped it to the top of the feeder to keep the part in the
pocket. Not too elegant and I would really like to know what is going on
here. I even tried blowing air from an ionizer fan on the reel to see if I
could neutralize a charge, but that did not help.

Thanks.


Bob


Robert Barr
Manufacturing Engineering
Formation, Inc.
Voice: 856-234-5020 x3035
Fax: 856-234-6679
email: [log in to unmask]

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