Electronics Forum | Thu Jul 02 16:01:57 EDT 2009 | ewchong
thanks kpm. agree the cause of those pads lifting. all of them were no connects so they cannot be the cause of the electrical failure. when the bga was removed, all the solder balls on the pcb turned into conical shape due to the separation, except
Electronics Forum | Thu Jul 02 08:01:26 EDT 2009 | daxman
Good morning everyone, I'd really appreciate your input on some of the best ways to create a dry environment for MSD storage. Line down-time is considerable when we have to pull of and reload 20 reels of MSD parts at the beginning and end of each s
Electronics Forum | Tue Jul 07 15:02:48 EDT 2009 | snsmt
Hello everyone, I have a question regarding rework. How do you guys rework QFPs (lead free)? The only method that we are currently doing is using a heat gun. We are heating up the bottom of the PCB (approx. 2") away from the bottom of the
Electronics Forum | Sun Aug 02 21:59:37 EDT 2009 | hohk
Wow! Thanks Jim!. When the ejector pin hits the piezo ceramic sensor, the sensor will produce a voltage difference between the top and bottom surface(that's why i need to connect the tracks on both sides) which i will measure. The sensor does not ne
Electronics Forum | Tue Aug 04 09:02:34 EDT 2009 | kpm135
We replaced the tactile sensor's linear actuator on a MPM Ultraprint 2000 HiE. Now we are getting a Tactile Hardware limit error every time we try to find the stencil height. I was hoping some one could explain why we're getting this error and any i
Electronics Forum | Wed Aug 05 23:02:09 EDT 2009 | mrduckmann2000
Help! We are havin issues installing the new Linear Tech LGA118's. We are installing 17 of these beast per assembly, the problem shorting? Any ideas? Linear Tech is usless, they blame heat, not a big enough reflow oven, moisture, part disty's...e
Electronics Forum | Tue Aug 18 02:10:14 EDT 2009 | sergey2007
Hello, I have a customer who recentely installed a vapor phase soldering system. Everything goes pretty well, but from time to time the customer has the same problem with the soldering: one of the components on PCB (usually, it's a QFP package) is ro
Electronics Forum | Wed Aug 19 18:18:02 EDT 2009 | smt_guy
Thanks Sir Dave. Yeah my apologies. To clarify, we built the product PCB whcih has a Lead-Free HASL Finish using a Sn63/Pb37 Solder paste. My major concern regarding reliability is that my profile whish is between 215'C-225'C was insufficient to ref
Electronics Forum | Sat Sep 05 02:34:19 EDT 2009 | martinphill
check R-axis mechanical backlash... After checking R Axis Backlash, Coupling. If still the Problem continues. We have the same issues & when we asked Jagadeesh Rajagopalan , he suggested following action item Check the servo Error display. If it i
Electronics Forum | Wed Sep 02 09:05:53 EDT 2009 | jamyboy
yes you can have Partminer only look to franchised distributors....but we have gotten our best deals from overseas OEMs that just have leftover parts. Also if there is ever a question about counterfeits etc. I believe that they have an independent te