Electronics Forum | Thu Nov 22 12:51:03 EST 2001 | Claude_Couture
One of the points brought forward on this discussion is the level of responsibility the management wants to give the operators. The more responsabilities = higher salary.therefore, in order to save money in salaries, the operators are not held accoun
Electronics Forum | Fri Nov 23 03:40:09 EST 2001 | ianchan
Hi All, agree 100% on product characteristics SPC, and do find process indicators such as paste Volume, useful to monitor via SPC, the printing process, as printing constitutes "70% cases of SMT defects". We juz purchased a 2nd hand CyberOptics 3D
Electronics Forum | Tue Nov 27 10:16:07 EST 2001 | davef
Oooo, I get it. We do that trick on the wave solder side of boards. On the bare board, during design / layout, the basic shape of the jumper is a 125 thou disc of copper [that of course is eventually covered with whatever solderability preservative
Electronics Forum | Sun Nov 25 22:54:20 EST 2001 | ianchan
Hi All, We juz purchased a 2nd hand CyberOptics 3D paste inspection machine (what a mouthful...) and am seeking info : 1) what formulae is applicable, to calculate the deposited solder paste volume onto the pre-defined PCB pads? 1.a) from our obse
Electronics Forum | Sun Dec 09 22:54:20 EST 2001 | dburr
It sound you have already discovered to root cause, flux entrapment in the via holes. Short of changing the desing, here are sone suggestions. The main thing is you have to dry out the via holes of the wet flux. Some things to try are: slow down t
Electronics Forum | Thu Dec 06 11:01:19 EST 2001 | Carol Stirling
This SMT process certainly makes a body want to win the $$$ and retire! We have been trying to stabalize the process and keep running into new problems. Any help would be appreciated on this issue. All pads on both sides have the same look - partial
Electronics Forum | Thu Dec 13 21:14:46 EST 2001 | davef
See. That's the connector that I thought it was. No, don't change your project!!! It sounds perfect. This will be a wonderful "learning experience" for you. You should get yourself a magnifying glass, some solder, and a soldering iron and go t
Electronics Forum | Wed Jan 09 11:14:39 EST 2002 | stefwitt
I wished, I would get a job like that. Malta is a nice spot! With 1500 Cph you can select any machine on the market, but here are some questions. If you use a glue machine you apparently deal with mixed technology boards. If your volume is that low,
Electronics Forum | Sat Feb 02 23:16:17 EST 2002 | caldon
STIMPMAN- Dave is correct Teflon has to be going somewhere. Solder is also expensive and to be dragging it around the fingers on your machine is not cheap either. (I am sure Debbie could recomend a reclain system ). Some times the pain is either fron
Electronics Forum | Wed Jan 30 08:30:33 EST 2002 | seto
Hello Dave, Mechanically the conection between the component pad and PCB pad is good (the solder joint is very strong). The problem is associated with poor contact after the use by the customer (vibration, temperature, etc). You can see the pictures
