Electronics Forum | Thu May 24 22:46:10 EDT 2007 | colormaker
The waste water is filtered then sent to city sewer. When we first started we had inspections and then they said our volume was so low and did not require continued testing. We wash 20-40 boards a month. Small 3x4 inch boards. If we hand rinse the b
Electronics Forum | Sat Feb 05 21:58:08 EST 2000 | Stu Leech
I agree with all of the previous comments. 1) Here are a few things to keep in mind when cleaning with water. To effectively clean, any liquid must wet the surface. By itself, water has a surface tension of 70 dynes/square cm. This is relaively hig
Electronics Forum | Tue Feb 01 03:28:49 EST 2000 | Guo Yingchun
Hi, I want to use ultrasonic machine to remove solder paste from PCB. Can I use water as the solvent? Will it do harm to the PCB? Thanks in advance.
Electronics Forum | Thu Mar 18 18:36:28 EST 2004 | jj
Thanks, Dave Is that for cleaning component or PCB ? JJ
Electronics Forum | Wed May 30 18:28:13 EDT 2007 | russ
you are sure that noone has brought in any alcohol based no clean flux? R
Electronics Forum | Tue May 29 15:10:30 EDT 2007 | realchunks
Hi Jerry, Sounds like the white stuff is flux. I doubt if 4 pcb mfgers could be undercuring all at once. Good point though. Since you changed washers and now have the problem - it's your new washer. Can you bring back the old one to make sure?
Electronics Forum | Thu May 24 16:59:49 EDT 2007 | pjc
Is wash temp the same in the new washer? I'm thinking that may be a clue. Are you sure nothing else changed, like water supply at all- conditioner? Do you have a supply of DI water?
Electronics Forum | Thu May 24 17:11:22 EDT 2007 | colormaker
Everthing is the same. I did not check water temp or wash cycle time. No DI just straight from water supply. How do I do the DI ? Jerry
Electronics Forum | Thu May 24 23:07:55 EDT 2007 | colormaker
Our filter removes all contaminates authou it takes forever to evaporate 20 gallons it work quite well. I will check with local water supply for mineral analysis. Will a water softener remove the minerals that may be causing the problem ?
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