Electronics Forum | Mon May 20 21:12:54 EDT 2002 | ianchan
xzinxzin, de' process engineer, Hi mate, as an active member of "that other subbie" currently successful in getting acceptable wetting for that MLF, i am not in a favourable position to advise you in process control. hope you can understand this po
Electronics Forum | Tue May 14 18:07:27 EDT 2002 | soupatech
My method is not good if accuracy is an issue. Most of our reels come with a guage on the back. It is not a perfect count but with a good eye you can get within a couple hundred on reels of 5k. On the reels shipped with no guage I usually just hold a
Electronics Forum | Tue Jun 11 13:13:42 EDT 2002 | kenbliss
To respond to your message that you are tired of Ken Bliss, obviously you are entitled to your opinion on any subject on this forum, that is what the forum is about. I offer facts on how to make PC board assemly factories work better and more profit
Electronics Forum | Wed May 22 10:27:33 EDT 2002 | stefwitt
Fiducial recognition on the Siemens machine works like the Mydata. Once you select this option, fiducials will be recognized when a new program is send. You can also select recognition as part of the feeder refill function mode. There is no automatic
Electronics Forum | Tue May 28 13:14:31 EDT 2002 | zanolli
Hello Mark, I'll assume that you are currently wave soldering and would like to eliminate that operation by using pre-forms or press-fit connectors. Solder preforms or solder flux bearing connector leads usually do not require any hole size changes,
Electronics Forum | Wed May 29 08:43:12 EDT 2002 | zanolli
Various solder metal supplies sell pre-forms as loose individual shapes, usually donuts. The loose performs then are placed on the connector leads. If you have any volume at all, you would want to look at a �shake table� that would vibrate a batch of
Electronics Forum | Tue Jun 04 20:34:28 EDT 2002 | russ
Jason, Excessive thermal ramp rates, misprints, improper pad design, paste type, placement pressure, all can cause solderballs. Do the pads on this board meet IPC 782 criterias? I have found that too much pad underneath component can cause this. A
Electronics Forum | Thu Jun 06 09:45:14 EDT 2002 | Hussman69
We based ours on the type of paste we use (stencil life) and not so much the machine. Then we coupled that to what 'true' conditions we normally see in our plant, and determined that under these conditions Max & min) our printing process should be g
Electronics Forum | Wed Jun 19 14:44:11 EDT 2002 | kenbliss
It sounds like your inspector improved quality and pre-staging your feeders dramaticaly increased uptime on your machine, thats great to hear. One cautiionary note, be careful not to flood your production area with parts off of your SMT line. With
Electronics Forum | Fri Jun 21 10:22:13 EDT 2002 | russ
A lot of your success with waving SMT components is dependent upon design and what type of wave forms you use. Without knowing how the board is laid out or what type of wave you have it is pretty difficult to determine what the yield differences wil
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