Electronics Forum | Wed Apr 16 19:23:52 EDT 2008 | molos21
I think you are close to the problem when you expect the pcb having a problem. When I look at your different pics I saw that your via holes looks like this pcb has a hasl finish... and when i look at Q 14 this picture tells me that the pcb is not an
Electronics Forum | Thu Apr 17 07:54:02 EDT 2008 | davef
Our quality types wouldn't allow: Q16 on "1up good board2.jpg", Q17 on "1up good board.jpg", or Q15 on "1up good board3.jpg". They'd probably pass Q13 on "Q13 next to Q14 no-reflow.jpg", if it wasn't part of a bigger issue. Again, you appear to have
Electronics Forum | Tue Apr 15 03:16:14 EDT 2008 | janz
Hello, We are having a problem with soldering QFP100 (16mmx16mmx1mm). Board dimensions: 70mmx50mmx1.8. FR4 two layers � single SMT assembly. Finish: HASL-lead free Oven: 7 zones �hot air Paste: lead free We have noticed that two groups of legs
Electronics Forum | Wed Apr 16 14:18:41 EDT 2008 | pima
Anyway thanks for any input from you Guys. Because at the moment we are trying to connect some products on one SMT platform (some short run about 100-500 boards from one product and changeover )and I just want to listen about ur experience with any k
Electronics Forum | Wed Apr 23 12:48:36 EDT 2008 | stepheniii
I worked for a company that did fast change overs with Panasonic machines. We also had dedicated feeders that never came off the machine. But even with over 100 different dedicated parts most set-ups still had 30 or more parts to load. All feeders w
Electronics Forum | Wed Apr 23 17:33:54 EDT 2008 | pima
so what period of times are you loosing for changeover? is it half of hour? more or less? because I think that should also be a useful indicator, how much time does it take to switch to different product if we are using panasonic,universal,fuji,phili
Electronics Forum | Wed Apr 16 15:38:46 EDT 2008 | ck_the_flip
This person needs to have the "mental faculties" and a basic understanding of science, and understand concepts like flux, solder paste, time vs. temperature curves, etc. Do they have to be a metallurgist?? Of course not, but at the minimum they hav
Electronics Forum | Fri Apr 18 10:28:59 EDT 2008 | patrickbruneel
Samir, The simple solution to your frustration is: NEVER talk technical to a manager talk numbers and $$$$. I made the same mistake in the past, I wrote long sophisticated technical reports to justify change in the process and never got anything a
Electronics Forum | Mon Apr 21 08:53:22 EDT 2008 | realchunks
I don't know of any standard, but do know most suppliers will sell you sub-par displays. Inner layer cracking is usually the biggest defect due to handling. We had our supplier in and they showed us what to look for under magnification @400 times.
Electronics Forum | Mon Apr 21 10:59:39 EDT 2008 | davef
That you have 'grainy' solder only at the ends of the connector and not at all solder connections indicates that your quality types are on track and are pointing you in a direction worthy of investigation and developing a better understanding of the
