Electronics Forum | Fri Feb 11 01:36:22 EST 2005 | brown
OK I am counting someone knowing this. True or False, if my touch-up operators touch-up the smt solder joints too many times will this make the joint weaker? if yes why? and what happens to my intermetalic layer? I have insisted if it looks good don
Electronics Forum | Fri Feb 11 09:44:01 EST 2005 | pjc
A touched-up solder joint is never as reliable as one soldered correctly by machine. Touching up adds more heat thereby increasing the thickness of the intermetalic bond. Our goal is to have the thinest intermetalic bond in our solder joints. The int
Electronics Forum | Mon Feb 14 13:25:52 EST 2005 | gregp
EIA-481 standard allows the maximum pitch on tape to be 4mm less than the tape width (12mm width and larger). So it is within the standard allowances. As for how common 20mm pitch on 24mm tape is I can not say. I am surprised a 24mm tape feeder ca
Electronics Forum | Mon Feb 14 14:46:42 EST 2005 | russ
We use Samsung and our 24mm feeders have 8,12,16,and 20mm pitch settings. I have found 20mm pitch quite common. My favorite is yhe 12 on 12 our feeders don't support that, we have to put them up on 16mm feeders our cycle them 3 times on a 4mm pitch
Electronics Forum | Thu Feb 17 11:48:08 EST 2005 | Rob
Hi Frank, What are your main issues on inspection? Is it missing or missaligned components, poor solder joints, or long inspection times? If it's a good system that does everything you could start it after the printer to verify that operation, the
Electronics Forum | Fri Feb 18 11:31:05 EST 2005 | carterhoward
I agree with stand-alone as well. We're a CM and have three AOI's, we keep them all stand-alone. We use them for paste inspection, first articles off SMT equipment, QC articles from SMT, hand assembly QC, TH first article and TH QC. We treat AOI as
Electronics Forum | Fri Feb 18 11:41:12 EST 2005 | Frank R.
Thanks Howard, I understand that it's excellent everywhere but the only thing with Stand-alone is how do you manage your production path if everything pass thru AOI? We produce a lot of PCB per year and as soon as a PCB break the standard path, it'
Electronics Forum | Sat Feb 19 10:01:13 EST 2005 | davef
Examples are: * Commercial airliner manufacturers are exempt. Regardless, Airbus announced that they plan to comply. A short time later, Boeing announced they would comply. * California with its copying RoHS legislation into state law has been form
Electronics Forum | Mon Feb 28 08:34:46 EST 2005 | Alex
Good advises thanks. I'll go thru all nozzles and vacuum check today and tell the programer about PD's and nozzle vs shutter. Should I check at the same time all the vacuum filter ? For the placement test, we use the same feeder at the same position.
Electronics Forum | Mon Feb 28 16:21:41 EST 2005 | lyrtech
Thanks a lot to all of you! I found my problem: It was the pressure of the ultrsonic spray fluxer who was to low. The flux didn't wet all the hole and the solder didn't fill completly the hole. No one in my area knew the solution. Thanks one more ti
