Electronics Forum | Tue Oct 27 22:52:18 EDT 2009 | davef
Top picture: We're not wild about the 'poor registration,' the differing thickness of the solder mask, and the crud all over the board. But, then again, we don't have a basis for rejection. Bottom picture: No basis for rejection Help us out, what do
Electronics Forum | Wed Oct 28 07:26:19 EDT 2009 | julie331975
I don't like these boards for a couple different reasons. 1. They may be fine functionally but they look like crap. 2. What is our customer going to think when we deliver boards that look like this? They will probably wonder the same thing I do...
Electronics Forum | Thu Oct 29 18:33:18 EDT 2009 | comatose
The top picture probably won't run. You have black soldermask dramatically misregistered and overlapping what look a lot like fids. Either your machines are going to pitch a fit and not find the fid or they're going to center on the soldermask outlin
Electronics Forum | Tue Nov 03 06:23:12 EST 2009 | josh_brubaker
Has anyone ever done a tape test to see if the solder resist pulls away from the PCB? Is this an acceptable method for testing solder resist acceptability? This is an issue I am experiencing with our PCBs. I am receiving boards with excess solder o
Electronics Forum | Tue Dec 27 06:52:34 EST 2016 | luciano
Thanks for your advice. I've tried setting the temperature up and even measuring the temperature at the wave itself but had no luck at all. I've also tried using temperatures going from 245 ºC up to 260 ºC. The amount of flux was adjusted as well a
Electronics Forum | Tue Dec 27 10:18:03 EST 2016 | anhsang38
Dear Pro, I want to confirm with you about conveyor speed. is 1m/s? We are using wave soldering but it is 1.2m/min, min not second. Pls, check it agian. The flux is not relative this error. It is relative no sodering, bridge. The solder bar is the
Electronics Forum | Thu Dec 29 10:47:22 EST 2016 | luciano
Thanks SuMoTe, I've already tried fluxing various boards (new clean ones and older ones) without turning the waves on and with different temperature setups (within the suggested params from Alpha) in the preheat zone. The results were in many cases
Electronics Forum | Fri Jul 27 13:51:53 EDT 2018 | vlad_saviuk
Hi, have some question: during solder paste printing I'm faced with problems on the edge of the PCB - solder balls on gold pads. During analisys we checked everything - change squeegee preasure, different cleaning cycles, squeegee speed - no effect.
Electronics Forum | Sat Sep 14 12:24:44 EDT 2002 | scottefiske
We need to remember here that as printer manufacturers were enhancing their product lines, miniaturization was quickly being developed in the background. In the last 2 years I was involved in developing and conducting a D.O.E./F.M.E.A in determining
Electronics Forum | Sun Nov 01 01:33:52 EST 2009 | isd_jwendell
Just my opinion: Top pic - Solder mask registration WAY too far off, without a doubt I would reject. Bottom pic - I would worry that there was/is a contamination that caused the poor looking mask. This may be cosmetic only, but unknown. I would rej
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