Electronics Forum | Tue Sep 20 05:21:41 EDT 2016 | abhilash4788
Hi, Currently we are facing bubble formation in conformal coatings in the pcba. Have varied various specs of the conformal coating machine, even during manual application also having the same issue. the material used is silicone conformal coating. N
Electronics Forum | Thu Mar 21 19:57:54 EDT 2024 | compit
I am looking for a machine to protect PCBs against moisture with varnish. It doesn't have to be very efficient, it seems that one for a desk is enough. What to look for? Is it worth looking for a used one? Best available in Europe.
Electronics Forum | Tue Aug 18 21:42:48 EDT 2015 | comatose
Why not just pick up something like an old Camalot 1414 and use that? Then all the work other than rigging up a valve is already done. 1414s go for a couple or five grand in workable condition, especially without a pump.
Electronics Forum | Thu Sep 10 17:13:31 EDT 2015 | tombstonesmt
There are factors that manufacturers have taken into consideration when dealing with coating. On/off times, dispense speeds, heights, etc.. Dedicated software with tools to easily map out paths are a godsend. We made our own coating machine with a s
Electronics Forum | Fri Sep 11 12:08:10 EDT 2015 | derrikf
I built one using an old Asymtek Automove. When all was said and done, it cost less than $400, including what was paid for the machine itself. It's a very basic setup, (air over syringe), but for our needs it does everything and more. With air to syr
Electronics Forum | Fri Oct 09 16:07:30 EDT 2009 | dlabelle
We use Dow 2620 silicone conformal coat applied with PVA1000 sprayer machine. If used on a daily bases, we have no problem. If we let the machine sit idle for over a week, we will get bubbles in the conformal coating. Sometimes, purging the line w
Electronics Forum | Thu Aug 27 08:34:50 EDT 2009 | floydf
I am having trouble with little air bubbles in my conformal coat. It ranges from a few pin sized bubble to looking like spit. We are using Dow 2620 silicone conformal coat applied with a PVA sprayer machine. The conformal coat comes in bladder bags t
Electronics Forum | Fri Aug 28 08:52:13 EDT 2009 | duso02
Yes, you must thin Dow CC for any spray operations. We use Dow 2577 daily for multiple customers and we always thin it for spray operations and 2577 is considered medium viscosity. Dow recommends using up to 60% solvent (Xylene). Your 2620 is low vis
Electronics Forum | Wed Sep 07 16:31:26 EDT 2016 | mnorthey
You can inspect joints using an X-ray machine and we use a sand-blaster type machine which blasts (Starch) to remove the conformal coating. (Carbo Blast). However; the inspection should be done prior to Coating, as we all know some jobs are rushed t
Electronics Forum | Thu Dec 10 15:33:55 EST 2009 | duso02
We use one quite often. Our machine is a Uvitron Conveyor 40 as we are a large coating house and this allows us to process many boards. Dymax also maufactures and sells machines as well. Humiseal and Dymax both manufacture UV coatings. Emerson Cuming
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