Electronics Forum | Wed Jan 31 17:57:07 EST 2007 | blnorman
We've had multiple issues with non-wetting components. You say only one part is not wetting? Profile won't be the culprit, if so you would have more part issues. We've used SnPb with lead-free parts for some time now, no issues. The issues we had
Electronics Forum | Tue May 22 11:03:11 EDT 2007 | Michelle
We now have an AOI in our process after printing and have noticed that all the small aperatures are getting clogged by solder paste. Mainly on all fine pitch parts. We are using Kester ws R562 SN63/PB37 mesh -325+500 90% metal. It was manufactu
Electronics Forum | Tue Jun 26 10:41:32 EDT 2007 | slthomas
We had a cooler fail once, before we had any SMT. Auto-insert was at the far end of the building, at the end of the compressed air line. When the Unimod (dip inserter) sprayed the operator with water when the pneumatic table rotation motor fired up
Electronics Forum | Wed Feb 06 16:05:24 EST 2008 | dphilbrick
At one point in time we were putting TI NanoStar parts on these particular boards. You don't want to attempt this at home! Thank God they took them off. Part was 1.45 X 1mm with 6 .1mm balls. They were a pain in the A$$. We had about a 90% success ra
Electronics Forum | Tue May 20 12:41:27 EDT 2008 | slthomas
We had some materials management brainiac insist that every component of a product had to have an exact quantity stated on the BOM so we had to weigh every board with and without paste printed. We rented a 4 place digital scale, weighed 5 of each boa
Electronics Forum | Fri Aug 08 11:09:15 EDT 2008 | wrongway
yes been workong with those feeders for almost a year and yes we have had the sensor pop out on a couple of the feeders I thought the pogo block would be the biggest problem with these feeders have had to replace a couple of those on the feeders as
Electronics Forum | Mon Jan 11 09:15:36 EST 2010 | lynn_norman
In a former job we had issues with leakage currents on a QFP. The component was acting as a thermal shield leaving a lot of flux residue behind. To make it worse, the flux solvent wasn't totally evaporated, so we had ionic residue, a fluid media, a
Electronics Forum | Wed Aug 18 09:41:47 EDT 2010 | namruht
Are you controlling humidity in your plant? I'm > not familiar with that particular paste, but some > pastes are sensitive to a humid environment. We > also had one paste supplier send us a batch that > had excessive solder balls if the boards
Electronics Forum | Mon Sep 19 09:46:32 EDT 2011 | blnorman
Hopefully the coating does contain a UV tracer. We used a silicone years ago that did not, but UV did make it fluoresce to a degree, you just couldn't ensure 100% coverage. One time we did have a problem with the coating getting on connector pins,
Electronics Forum | Wed Dec 04 11:51:36 EST 2013 | cbeneat
We use ours multiple times a day x 3 shifts. As the maintainer, I personally am satisfied I change the filters monthly and keep it full of cleaning fluid. I will say we have another facility that has the same washer, they have had more issues than
