In a message dated 8/14/98 11:11:13 AM Pacific Daylight Time,
[log in to unmask] writes:

<< Most of the industry is autoinserting through hole with SMD on one or both
 sides of the panel. I've done it with top side SMD since the mid '80s at
 various employers.

 You'll get more problems with backwards parts, high parts, missing parts,
 wrong parts... from hand insertion.

 I've never heard of problems related to stressing parts with standard
 clinching and areas.

 ARIC PARR
 Sr. Manufacturing Engineer
 Eaton Corp
 1400 S. Livernois
 P. O. Box 5020
 Rochester Hills, Mi 48308-5020
 [log in to unmask]
 248 608 7780
 Fax: 248 656 2242

I agree with Aric, I've always auto-inserted topside PTH after SMT if there
was enough auto-insertable PTH components to make sense to do it...if there
were just a handfull of parts, I would go ahead put them over on the slide
line to get stuffed along with the connectors.

The biggest issue with autoinsertion on mixed technology boards that I
normally run across is with the epoxied SMT parts getting knocked off before
wave...and that wasn't from the auto insertion machines either, any issue
along those lines would be taken care of at the time the program was
created...if the clinch was gonna hit something on the bottom, then we'd just
take that step out of the sequence, no problem. Where the components were
getting knocked off was just from the handling...

-Steve Gregory-

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