Electronics Forum | Fri Jun 02 16:22:53 EDT 2006 | Randy
Do not believe every thing your suppliers tell you, even a written cert does not guaranty compliance. We recently purchased a Niton XRF analyzer. The first day in use we found component�s that were made for us "RoHS" that were far from compliant. Peo
Electronics Forum | Thu Jan 19 13:32:10 EST 2006 | daxman
Hi David, I've only ever worked with MPM, but my experience with them has been excellent. I've recently started with a new company, and we have a proto line that uses an SPM. I found the worknest a little frustrating at times, but the set up is fa
Electronics Forum | Fri Jan 20 05:53:23 EST 2006 | dougs
i think it's more likely to be greasy/dirty shaft clutches, stand at the front of the machine and use the cam handle to turn the cam, while your doing this push up gently on the black top section of the shaft and try to turn the shaft, it shouldn't r
Electronics Forum | Mon Apr 17 22:52:02 EDT 2006 | daxman
Okay, we got the machine back together about 2 weeks ago, cleaned the clutches and measured the placement accuracy. We are back up 100%, and have not seen any stn 17 & stn 19 nozzle errors. Thanks guys!! 19 of the 20 clutches are really tight; they
Electronics Forum | Tue Jan 24 07:43:45 EST 2006 | Chunks
Q: If you do not use a selective wave pallet does this not leave the possibility of solder flowing up thru the Via's on the board? A: No. Your board house can cover your vias with solder resist. Your board house can plug the vias. You can cover t
Electronics Forum | Sun Feb 05 09:29:12 EST 2006 | Cmiller
Look at: http://thor.inemi.org/webdownload/newsroom/Presentations/09.pdf Page 47 shows both alloys to be similar in reliability although its a little troublesome that the particular defects are not isolated as I feel there is a big difference betwee
Electronics Forum | Sun Jan 29 14:10:14 EST 2006 | gipos
Hi GS, We are contract manufacturer for small series of electronic equipment fully trained for SMT.Making mostly RF with only few QFPs,TSOPs...SMT machine assembly was made by local subcontractor when needed. Recently we acquired two Juki 730 machin
Electronics Forum | Sun Feb 05 09:49:11 EST 2006 | Cmiller
We have been using ENIG for 8 years as our primary board finish. We have not seen any issues with tenting the vias. We have used a number of suppliers. The ENIG from China does not seem to solder quite as well in general but only had black pad from o
Electronics Forum | Tue Feb 07 11:26:40 EST 2006 | Cal Kolokoy
At the wave, you should collect data on the critical process parameters. The cliche being, it's better to control your process via SPC versus performing SPC on defect data. Perform a DoE to determine which variable interactions have the greatest eff
Electronics Forum | Mon Feb 13 16:24:39 EST 2006 | samir
SPC was a fad of the '80's and has been mis-used by the igonorant for decades now! Doing SPC on defects is a case in point. Hell I implemented wave SPC programs before eating breakfast at 2 previous companies, and they worked great..resulting in 25
