Electronics Forum | Tue Oct 28 18:58:05 EDT 2014 | rangarajd
You might want to consider using a stepped stencil. We have tried using a 5 mils with an increased aperture size to compensate for the lost solder volume, if you were to use a 6 mils. While the yield was good, we'd still get random opens. With a 6 m
Electronics Forum | Thu Jan 29 15:27:54 EST 2015 | markhoch
I agree with SWAG on this. Nano Coatings make a big difference on paste release. I found when placed on the topside of the stencil, it also helps to reduce stencil wear, though others complained that it affected the solder roll, so most stencil house
Electronics Forum | Mon Nov 10 08:53:23 EST 2014 | jpal
We have the opportunity to buy a new selective solder machine and are used to using a very old Jade machine with a moving tank and wetted nozzle. I have two process concept questions: Which is better- move the board over the nozzle or move the nozz
Electronics Forum | Fri Nov 14 10:40:35 EST 2014 | eniac
I use a two machines from EBSO, Germany. It's a machines with PCB carrier, so, solder pot is fixed. I'm fully satisfied with this equipment, but I use only wettable nozzles. If you would like to buy a new machine, not in used condition, EBSO will be
Electronics Forum | Fri Nov 14 17:15:54 EST 2014 | tombstonesmt
Are you experiencing the solder balls on the opposite side of connector insertion or same side? If it's the same side as connector insertion how many strokes are you using at? We've experienced a few issues with pin in paste, everything points back
Electronics Forum | Mon Nov 17 14:42:02 EST 2014 | tombstonesmt
Sounds like your snap off profile needs adjustment. More than likely there is paste under the stencil being transferred over to the board. Try adding a cleaning cycle after every board to determine if this is the issue. If the solder balls go away af
Electronics Forum | Mon Dec 22 18:10:44 EST 2014 | sreejhu
What do you mean by solder in ROHS. Can you please explain me little bit. Is that really important while doing lead free process. Also, please tell me wether a 8 zone (4 bottm and 4 top) reflow oven with 300 degree max.. Is good to do the lead free
Electronics Forum | Wed Jan 07 17:34:52 EST 2015 | duchoang
Customer puts our board to thermal test. Test cycle is -55c to 85c, repeat cycle in 15-20min. After 600 cycles, lot of TSOP joints are cracked, leads lifted. There are reasons such as thin PCB, mechanical impacts, warped PCB... My question is, how lo
Electronics Forum | Mon Jan 19 20:26:07 EST 2015 | cspasol
Anyone can help me what kind of solder lead use to connect thermocouple wire to pcb for profiling? We use ordinary lead on our profiling and it flats on when reaching 230C temperature. Our required maximum temp is 240C.
Electronics Forum | Thu Jan 29 15:28:53 EST 2015 | jpal
Do any of you use your AOI machines to inspect do-not-install locations? Do you look for solder bridges or stray parts in those spots? Everything I have learned and heard involves part placement and solder quality. But is it worth going that extra le
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