Electronics Forum | Tue Apr 28 09:06:19 EDT 2009 | nibirta
Well the only spec is 10.88% flux, 89.12% metal. the problem is only at one specific capacitor we have this issue. Sn over Ni finish. Sn-Ag solder paste. I have read all the arhives from the site, but nothing explains me what is happening.everything
Electronics Forum | Thu Apr 30 01:44:45 EDT 2009 | nibirta
sorry. i forgot to mention. we have now two cases! one with two different lots of solder paste and one with a bad lot of components. May be u are right. Somebody did something. By the solder ball test on glass no solder balls were found. Only in the
Electronics Forum | Thu May 07 08:12:06 EDT 2009 | milroy
Hi I recommend you to check the exhaust sensor, the ERSA EWS500F is sensing the exhaust before it activates the fluxer. If the exhaust is not working then machine does not start to avoid the sprayed flux emit to the work environment. There is a sens
Electronics Forum | Thu May 07 17:39:17 EDT 2009 | xinxi
Thanks Milroy!!Just want to make sure I got the correct position for the sensor. Is the sensor fixed at the exhaust tube looks like a metal pipe and plastic tube that connects to the top of the machine? So do you mean I need to clean this metal pipe?
Electronics Forum | Thu May 07 17:50:41 EDT 2009 | ecad
Hi, I'm a newbie here but I've lurked about this forum in the past! I'm an experienced PCB Designer I've found myself out of work due to the economy so I'm attempting to start out as a freelancer, I've found that more than a few of the smaller R&D fi
Electronics Forum | Fri May 08 02:23:15 EDT 2009 | tang
Hi all, Presently, we have loan a thermometer probe from supplier which used to check Soldering pot temperature. But we found that the probe consisted of High CR6+ (Chromium) with reading about 187000ppm. As I know stanless steel consisted this ch
Electronics Forum | Wed Jan 06 04:43:22 EST 2010 | deltaservices
If you are working smt machines in Europe or US then your most important issue is setup time and operators needed to run the machine. People are way more expensive then machines. I know the assembleon machines, Gem line and the new MG lines are grea
Electronics Forum | Tue Jun 02 21:27:22 EDT 2009 | davef
We've never heard of a situtation where oversized pads caused voiding. Your supplier is correct that the pads on the board should be the same size as the pads on the interposer, but this is to improve reliability issues. Search the fine SMTnet Archi
Electronics Forum | Mon May 25 20:17:56 EDT 2009 | paligora
Hi , we have problems with the pick & place nozzle when assembling data switches on the PCB. The SMT switches have top surface with diameter of 2.6mm and our supplier is suggesting that if we need to replace the current nozzle which has oval suction
Electronics Forum | Mon Jun 01 17:41:20 EDT 2009 | gregoryyork
What is your squeegee pressure and size. Also does the pad sit on a ground plane, as it looks like it is partially reflowed so surface has gone but not coallesced properly which would indicate it is more a problem with reflow above 217-219C OR obviou
