Electronics Forum | Fri Jan 22 14:31:14 EST 1999 | Dave F
| I have boards coated with Humiseal 1B73. At a late point mfg. site we need to remove a series of 0603 resistors for optioning purposes. I have been trying to determine the fastest, easiest way to re-coat the pads after removal. Drying time of the c
Electronics Forum | Thu May 09 10:12:08 EDT 2013 | wahahasteven
this is one of my project. I have tried to remove coating only on those areas with alcohol and thinner, then program the machine to coat the removed area again. But the result obviously shows that two different tones of coating on the board. I also
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 | Fri Feb 24 07:28:11 EST 2012 | duso02
If you are going to coat very low volumes then just spray it by hand. The automated machines just won't be worth it unless you are going to do a very large run. They are complicated, require constant attention, still require masking the board and are
Electronics Forum | Fri Jun 12 13:28:23 EDT 2009 | dontfeedphils
Asymtek in-line machine with the Jet head hands-down. And since you will be coating silicone you should virtually have no touch-up after it exits the machine because of the higher viscosity of this material.
Electronics Forum | Tue Mar 07 07:56:54 EST 2006 | amol_kane
Hi, I have a PVA conformal coating machine. Does anyone out there have a method to control the process once it is in the automated mode? my problem is that eventually the coating gets into the keep out areas a little bit and causes issues. is anyone
Electronics Forum | Fri Jun 04 21:21:04 EDT 2004 | johnwnz
Hey folks, time to put the collective brain into motion. I need to source a conformal coating machine for some medium volume production of assorted PCBA's. I'm looking for something that's easy to program, accurate, good running costs and all that g
Electronics Forum | Mon Aug 14 15:00:46 EDT 2017 | charliedci
We run a "no clean" soldering process, class II primarily, conformal coating using a Humiseal acrylic coating, applied by machine and by brush. We have seen very few coating issues in my 10+ years from contamination by body oils. We are not using glo
Electronics Forum | Fri Mar 31 15:23:10 EST 2006 | jdumont
We have a C-740. I agree with the second pass statement. Be careful how much you overlap. Also make sure the board is very clean before you coat or its worthless. You will be able to get very accurate results without masking. Let me know if you need
Electronics Forum | Fri Aug 06 07:18:48 EDT 1999 | Graham Naisbitt
| | | | | Has anyone out there tried to parylene coat plastic parts prior to soldering them to a pcb? I'm looking at several potential applications where fewer than 5% of my components on a pcb are plastic, yet from a reliability aspect (environmenta
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