Electronics Forum | Tue Sep 04 09:38:38 EDT 2012 | cobham1
The best thing you can do is to clean the board that has a solder paste defect on it. If you don't you probably will have issues after reflow. This could include bridging, raised parts, or any number of issues. You need to remember that if you are re
Electronics Forum | Fri Jan 25 12:14:18 EST 2013 | johng
I'm using urethane conformal coat and have fisheyes and dewetting after coating even though the PWAs have been through the wash cycle twice. I'm looking at using Ionox 13302 in an ultrasonic cleaner as a short term solution until root cause can be id
Electronics Forum | Fri Jan 25 12:15:04 EST 2013 | johng
I'm using urethane conformal coat and have fisheyes and dewetting after coating even though the PWAs have been through the wash cycle twice. I'm looking at using Ionox 13302 in an ultrasonic cleaner as a short term solution until root cause can be id
Electronics Forum | Wed Dec 04 11:51:36 EST 2013 | cbeneat
We use ours multiple times a day x 3 shifts. As the maintainer, I personally am satisfied I change the filters monthly and keep it full of cleaning fluid. I will say we have another facility that has the same washer, they have had more issues than
Electronics Forum | Thu Aug 17 21:56:05 EDT 2017 | v037022
Dear experience members, Now we are using permelex squeegee blade and we do cleaing it after printing 24 hours. Actually, it took very long time to clean. we need to take out one by one screw and use bemcot paper/ alcohol to clean solder remaining on
Electronics Forum | Wed Mar 21 15:32:08 EDT 2018 | padawanlinuxero
I agree with the other comment, if you have misprint something is wrong with the screen printing process, meanwhile try to get a ultrasonic cleaner for your boards, another thing you can do is to use dummy boards, if you don't have a lot of different
Electronics Forum | Wed Sep 25 10:22:21 EDT 2002 | matt2138
UltraSonic cleaners do a good job of cleaning both stencils and misprint PCBs. Make sure the frequency that the machine comes set to is ok to use with both stencils and misprint PCBs. If you are a CM make sure your customers are ok with using the ul
Electronics Forum | Thu Sep 06 10:55:37 EDT 2001 | davef
saturation occurs at ppm levels. Remember, IPA is extremely flammable and its bulk use makes the plant liable to all sorts of quite repressive safety rules/regulations and so on. Ignoring these rules exposes the owner to fines and possible plant cl
Electronics Forum | Fri Aug 25 07:37:00 EDT 2000 | Jason
George, We print adhesive on a regular basis. We use LOCTITE 7360 SMT adhesive cleaner. We also purchased a handheld ultrasonic stencil cleaner that works very well. It is very important to keep the glue from curing in the apetures as this will mo
Electronics Forum | Wed Feb 01 13:46:05 EST 2006 | Chunks
Sounds like a epididymis! It depends on your paste chemistry. You can't just slap any old saponifier in there. Most water based cleaners evaporate the water and you have to remove the dried paste. It's a bit messy, maybe that's why your's is over
