Electronics Forum | Sat Jul 26 11:40:09 EDT 2003 | mantis
All, Is it possible and reliable to replace bga's on Enig boards with out suffering from mass fallout due to blackpad defect.I have a couple of boards requiring bga replacment but i have been told that it is not possible to replace them reliable that
Electronics Forum | Tue Jul 29 09:28:24 EDT 2003 | russ
Why would you get black pad from rework? I could be wrong but once the pad has accepted solder from the first reflow process wouldn't that eliminate the possibility of a latent finish defect? I am curious. We do perform rework on ENIG all of the tim
Electronics Forum | Tue Jul 29 15:48:47 EDT 2003 | mantis
Thanks all for you input, Perhaps i wasnt making my point clear,I have some boards with black pad defect and i wanted to know could i rework them succesfuly with out incurring the wrath of this scourge,but from your commenst it seems i may as well se
Electronics Forum | Mon Jul 28 18:31:43 EDT 2003 | mantis
Hi There, First has the machine in question had the camera upgraded to accomdate 0603/0402. It sounds like there is a bad pickup on this part.Are all nozzles ok is feeder indexing correctly has part pick up position(Station 1) been calibrated. Hope t
Electronics Forum | Wed Jul 30 14:03:32 EDT 2003 | ryan1v
Hello Roger, Thanks for your help. My problem has been solved. I slow down the cam speed to 99%. But I still don't truly understand why. Maybe I have to check all the valve just like daniel said. Thank you. Ryan
Electronics Forum | Wed Jul 30 00:05:05 EDT 2003 | praveen
Hi, I am observing warpage in the PBGA during reflow in rework machine.Reflow profile is std. (Peak temp is 214 deg C using 63/37 paste). Please advise what should be the gap between the nozzle and the BGA body during reflow process in SRT BGA rework
Electronics Forum | Thu Jul 31 15:29:25 EDT 2003 | bcceng
A couple of things you can look into 1. The proper bottom pre-heat of board. If you are applying only direct hot air to BGA without preheating can cause BGA's to warp and collapse un-even. 2. Moisture on you BGA's. If BGA's were not properly packa
Electronics Forum | Mon Aug 04 17:35:08 EDT 2003 | Dean
If you lay a flat edge on the PBGA, it is visibly warped? How much of a warp? 0.001, 0.010, 0.050 what? What is your pcb temperature just prior to entering the spike process (zone or step or what ever you call it)? Is it between 165 and 175 C?
Electronics Forum | Wed Jul 30 09:35:39 EDT 2003 | jseagle
What do you all think about Cookson trying to sell off their Speedline division? I was just about to purchase an Electrovert Aquastorm 100 but now I am not so sure. Does anyone here have an Austin American in-line wash? Looking for feedback as the
Electronics Forum | Thu Sep 25 18:30:26 EDT 2003 | lysik
I buy a ton of used equipment. The price of used MPM/Electrovert has gone up. Trust me all the doom and gloom is just %$#^. Buy the stuff it is good strong reliable equipment. No problems. I just paid 30K for a used Aquastorm 200 with no customer in
