Electronics Forum | Wed Mar 11 16:43:20 EDT 2020 | sumote
There is a 8lb steel plate that is held down by 4 toggle bolts at the top of the machine. Its where you load the cutting media. If that plate does not have a pressure gauge built into it, contact CCR. They will send you one free of charge (at least t
Electronics Forum | Mon Jul 20 15:53:10 EDT 2020 | robl
Tape test to check adhesion and multiple point thickness test - each board has 5 points per side documented for thickness testing & we measure pre & post coating thickness with an electronic meter. Also temp & humidty are also logged, and alarms go o
Electronics Forum | Sun Jun 13 09:54:30 EDT 2004 | Andy Wong
I am working on an acrylic coating with solid content around 30%, I want to control the coated thickness to be 1 mil exactly. Any experience on this. Best regards.
Electronics Forum | Thu Mar 26 10:03:29 EDT 2009 | sachu_70
How do you intend to maintain uniform coating thickness using a paint gun, besides ensuring coating consistency? What is the application you are looking at?
Electronics Forum | Fri Feb 26 17:31:02 EST 2016 | caurbach
Rob, Have you considered doing multiple dips to build the coating thickness up to what your customer thinks is good? We've done this on a small handful of products for several years. Extends your lead time, but it doesn't need to fully cure betwee
Electronics Forum | Wed Aug 27 08:06:43 EDT 2008 | davef
Thick, hard conformal coatings of acrylic, urethane and epoxy have a well documented history of causing solder joint cracks and breaking glass/ceramic and other brittle components. Dissimilar expansion and fairly high surface bond strengths of the ma
Electronics Forum | Sat Sep 25 08:59:59 EDT 2004 | davef
IPC-HDBK-830, Guidelines for Design, Selection and Application of Conformal Coatings says: A conformal coating may have several functions depending on the type of application. The most common are: * Inhibit current leakage and short circuit due to h
Electronics Forum | Tue Jan 24 21:07:17 EST 2006 | davef
We all genuflect to Graham Naisbitt, a generous contributor to SMTnet. Moisture-curing urethanes may form minute bubbles if the coating is too thick or the coating environment is too humid. So, tell us more about your urethane and the method you u
Electronics Forum | Fri Nov 09 16:59:32 EST 2001 | davef
Dunno. What is your goal in coating boards? What material are you using? How thick are you applying this material?
Electronics Forum | Thu Feb 25 10:30:21 EST 2010 | davef
It sounds like your poly dots are secreting something that affects coating thickness. Is this a function of the adhesive used by poly dot supplier?
