Electronics Forum | Thu May 04 13:20:55 EDT 2023 | tommy_magyar
We do the same as dontfeedphils, with the difference being that it goes through a drying program too after stencil wash program (3 mins @ 90 degrees air spray) to dry out the via holes and any trapped liquid from under the components.
Electronics Forum | Thu May 04 19:13:56 EDT 2023 | proceng1
This isn't always an option. We do a lot of very fine pitch and often will get a clogged aperture and have to wipe and print again. Also, as we are CM, some of our boards are customer supplied and they do not send any "test" boards.
Electronics Forum | Thu May 04 19:43:49 EDT 2023 | auriga2001
The idea is you test printing cycles with one board before thoroughly cleaning it. The board doesn't get thrown away. You just test print and wipe one board until you get a good print, then thoroughly clean that board. What would you use to clean a p
Electronics Forum | Thu May 04 13:42:47 EDT 2023 | wippsen
there is no reason to completely clean a circuit board. If you don't use a professional cleaning machine, you will always have leftover paste. Use a test board until the paste print is ok. You can wipe this off several times until the paste print is
Electronics Forum | Fri May 05 15:41:54 EDT 2023 | proceng1
At the beginning, we absolutely do this with the first board. However, we do have some problem child jobs where we end up wiping 1 in 5 prints. When searching the topic, most of what I got was "ultra-sonic" cleaners, but that isn't recommended for
Electronics Forum | Mon Jun 05 15:54:45 EDT 2023 | daniel_stanphill
We purchased a Aqueuos machine that I would highly recommend to anyone. Before that, we used the ultrasonic cleaners with great success. We'd just run it for 5 minutes (whether the board is populated or not) and let it air dry under a blower and it w
Electronics Forum | Mon Jun 05 15:59:25 EDT 2023 | daniel_stanphill
Sorry I thought I had replied to this message. I will admit we took some things for granted in the past. More research has been done to determine how many heat cycles a component can have, if it can be submerged, etc. That said, if you don't have an
Electronics Forum | Thu May 04 11:37:25 EDT 2023 | proceng1
Thank you. I do feel that the document is very lacking in detail. It mostly says "yes, it needs cleaned. Make sure the cleaning process doesn't screw it up". The majority of boards that get wiped are already populated on the other side. So that lim
Electronics Forum | Tue May 09 11:46:03 EDT 2023 | tommy_magyar
I re-read the comments and it is unclear what will be the resolution applied in your case, neither if you use the stencil washer for misprint cleaning purposes. I am just curious. Are you not using your stencil washer to wash the PCBs too? Thinking i
Electronics Forum | Fri Apr 22 05:01:19 EDT 2011 | azrina
Hi, I am doing my master degree in flux cleaning process for flip chip assemblies and required to establish a new receipt for flux cleaning. currently, i am doing screening process for the parameters involve ; temp,pressure, surfactants, speed and a
