Electronics Forum | Fri Nov 04 07:28:31 EDT 2011 | duso02
2577 is basically a thinned a RTV so there really isn't a gel version. You can use an RTV like 3145 first or apply un-thinned 2577 by hand around the base of the connectors prior to the spray step.
Electronics Forum | Fri Jan 24 11:45:58 EST 2003 | Randy Villeneuve
I am not familiar with your flux but with no-cleans (which I use) the primary cause of icicling is the amount of flux solids left on the board prior to wave and how long the board is in the wave (2.5 to 3.5 seconds should be OK). The amount of flux s
Electronics Forum | Tue Sep 20 11:59:06 EDT 2011 | SheanDalton
Check specific gravity: According to a quick web search, the specific gravity should be 0.813 ± 0.003. If you have records of the specific gravity, compare current reading to past readings. Check pressure near stone: if you have records, compare
Electronics Forum | Tue Sep 20 14:03:53 EDT 2011 | russw
We don't have the equipment to check specific gravity, we just assume what's on the bottle is correct and we've never had a problem. The stone sits in an open chamber, so there really isn't any pressure to check. When we vary the air flow, the foam
Electronics Forum | Fri Dec 27 17:40:55 EST 2019 | rgduval
Using no-clean flux will make the boards very difficult to clean. If you can switch to water soluble flux, your life will be much easier. The "icicles" lead me to think that the board isn't getting hot enough in the pre-heat cycle, and/or there isn
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 Nov 29 13:09:12 EST 1999 | Mike Konrad
There are three primary methods of stencil cleaning. � Hand Cleaning � Spray-In-Air Cleaning � Ultrasonic Cleaning Hand Cleaning: Hand cleaning involves the removal of solder paste or adhesives from stencils using a chemically saturated wipe and /
Electronics Forum | Wed Jun 30 00:20:08 EDT 2010 | leadthree
Thanks for your reply. This production lot is already finished. We produced in 2 lots, first was no-clean (and was ok), 2nd lot was cleaned (aqua based), and I need to look into the cleaning further. Since it's all finished I can't get parts from se
Electronics Forum | Tue Feb 01 14:03:16 EST 2000 | Bill Schreiber
When cleaning water washable flux from PCBs using U/S, the final rinse can be with spray DI water for aesthetic purposes because the wash cycle is really just a long U/S rinse (no added chemistry). Fresh DI water should be continuously added to fresh
Electronics Forum | Fri Dec 30 11:31:32 EST 2016 | horchak
First profilers are expensive and you can use temperature dots for setting up a wave. You stick them to the top side of the board and they change color based on temp. Top side temp should be around 250f or 125c when it hits the fountain. If you spra
