Electronics Forum | Fri Feb 20 14:05:45 EST 2004 | northern
I talked QC into accepting the bulbous joint, the problem was it was often shorting to a well placed via next to it. I say WAS because I reduced the dwell time in the main wave (you are correct 50/50 flow) to approx. a nanosecond, which reduced it en
Electronics Forum | Sat Mar 06 06:15:14 EST 2004 | Bryan
Thanks Tommy. In fact I've tried many types of profile,but it didn't work.I'll try to make the peak temp. as low as 205C and dwell long as in some threads Dave said.I've tried baking the BGA and PCB before mounting also dindn't work.yes,I've heard th
Electronics Forum | Mon Mar 08 11:18:42 EST 2004 | Dave Euser
Hi everyone....I'm a student working on a short research project on industrial control algorithms - and part of the scope that we are looking at is SMT pick and place machines. I was wondering if anyone knows what type of control is used for the no
Electronics Forum | Fri Mar 19 16:21:26 EST 2004 | davem
Steve is right, Cyberoptics and ASC are the 2 main players in this market. I've used machines produced by both manufacturers and they both do a pretty good jod provided the operators know what they're doing. The LSM and LSM2 are solid but aging mac
Electronics Forum | Fri Apr 30 11:55:55 EDT 2004 | Chris Lampron
Hello Fredrick, I have used several methods of TC attachment including quick set adheasives (not good at reflow temps as Dave suggests) long set two part epoxies (work well if you have the time to wait for a sufficiant cure) temprobes, tape (kapton
Electronics Forum | Wed Jun 16 13:25:09 EDT 2004 | russ
have you tried a more agressive flux like water soluble to see if the problem goes away? Or can they be hand soldered with no problem? I am basically out of ideas other than a bad nickel or tin finish. The reflow profile didn't seem out of whack f
Electronics Forum | Tue Sep 14 04:28:36 EDT 2004 | Rob
Hi Dave, 3M� Spray 75 Repositionable 500 ml was the last we used due to a bright spark in purchasing, but production didn't get on with it too well. The only one that really gives us good consistant performance was the original 400ml Spraymount a
Electronics Forum | Sat Aug 14 21:31:31 EDT 2004 | Daveylau
I'm currently working in a SMT factory in China. I'd like to know what preparation that I would need to change from leaded to lead free soldering. 1.Starting with the PCB production, things that I need to concern about are solder mask, Cu protection
Electronics Forum | Thu Sep 02 10:41:41 EDT 2004 | dj_jago
Other way around Dave. We decided that the Delta had more in common with the Electra rather than the Vectra, the Electra being much more expensive. For example, we wanted 3 preheat zones for lead free and this would mean an exernal fluxer unit if
Electronics Forum | Tue Aug 24 12:36:45 EDT 2004 | Cal
Hey Dave I deal with this every day. UGH!!!! We created a Bin location for each of our pick-and-place machines. Once the parts are moved from stock the computer will be updated as SMT 01xxx, SMT 02, and SMT 03 Bin location for that part. SMT01-03 are
