Electronics Forum | Thu May 28 23:03:15 EDT 2009 | davef
10kv on the surface of the board. To avoid this charge: * Use an electric paint sprayer to apply liquid -base conformal coating * Purchase a metal nozzle for an electric spray gun so that it can be connected to ground * Use a nuclear ionizer where th
Electronics Forum | Fri May 29 23:19:46 EDT 2009 | isd_jwendell
I too have heard of the ESD problem when using aerosol spray conformal coating, but I haven't found any documentation. I have been spraying SR conformal coating for ~ 10,000 boards with no failures due to the coating. The person spraying is grounded
Electronics Forum | Thu Jun 04 14:35:11 EDT 2009 | floydf
We wound up using a ramp to spike profile with 50 sec. between 150C and 217C and 90 sec. above 217C. The idea being the flux is still active when it hits reflow, and it stays in reflow long enough for the weird alloy in the parts lead to wet. All par
Electronics Forum | Mon Jun 01 22:56:39 EDT 2009 | davef
Reflow soldering de-ages the capacitors. Two things may be affecting your testing. * Capacitance measurements are often erratic during testing for about 10 hours after de-aging. * Test limits should be set so that the capacitance value is within the
Electronics Forum | Fri May 29 13:09:34 EDT 2009 | jorge_quijano
Hello guys, just to know your opinion, based on your experience, what criteria would you focus in at SPI Machine evaluation, for now we are considering 2-3 brands, we are evaluating cycle times, GRR, cost of ownership, Spare parts availability. And a
Electronics Forum | Tue Jun 02 22:23:09 EDT 2009 | mikehe
Where do you getyour stencils from, ask them, I buy everything from DEK(Vector Guards) and they help me 100%. Apperture size, we always have cut 1:1 for the BGA's you can try 4mil stencils. But you have to keep in mind what the other parts you have o
Electronics Forum | Tue Jun 09 12:35:18 EDT 2009 | jdumont
We have used an Asymtek C-740 for about three years now and its never had an issue even once. We spray Humiseal acrylic so I cant help you too much with the silicone but the machine itself is great. Opt in for the little process control extras lik
Electronics Forum | Tue Jun 16 11:29:16 EDT 2009 | operator
Does anyone have ballpark figures readily available for how much conformal coating machines cost? Benchtop and In-line? New and Used? I am really curious and considering purchasing, but don't want to go stir up a hornets net of salesman at this po
Electronics Forum | Fri Jun 05 14:22:28 EDT 2009 | rdoom
I found this morning that my old Fluidmove software has crashed. I also found out that my installation disk #3 of four is not good. The Fluidmove DOS software revision is 3.3G. Does anyone out there have a copy or image of the diskettes? Any Ideas o
Electronics Forum | Fri Jun 05 14:28:16 EDT 2009 | rdoom
I found this morning that my old Fluidmove software has crashed. I also found out that my installation disk #3 of four is not good. The Fluidmove DOS software revision is 3.3G. Does anyone out there have a copy or image of the diskettes? Any Ideas o
