Electronics Forum | Fri Apr 11 06:22:04 EDT 2008 | andrzej
Hi Andrzej, > > We are using for BGA (0.8 pitch) > square apertures size 0.4 mm (rounded corners r = > t) and stencil thickness t=5 mils. So area > ration-_ w/4t=0.8 > > Regards Jan Hello Jan, I understand that you have the same pad dimensio
Electronics Forum | Thu Apr 17 16:59:44 EDT 2008 | jmelson
What sort of parts are you looking for? I'd think the springs are fairly non-critical, and easily picked out of a big spring catalog. There are some E-clips and such things, but everything else (in their older feeders, at least) look totally custom
Electronics Forum | Wed Apr 16 15:44:35 EDT 2008 | jwolvans
Just a thought: if nothing else makes sense, you might want to watch the action of the edge-hold chains of the reflow oven, are they moving smoothly and uniformly around the drive gears and idlers? I've actually seen the situation where the chains we
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
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