Electronics Forum | Thu Apr 21 11:43:03 EDT 2005 | davef
We understand the problem of trying to coat over RTV. We have seen the same problem with acrylic and urethane coatings not wanting to stick to RTV. Some acrylics seem to be worse than urethane. Since this is a new product, may be you could pot your
Electronics Forum | Wed Jan 03 21:20:22 EST 2007 | davef
Comments are: * General purpose RTV (RTV-108) releases an acetic acid (vinegar) during cure and corrodes copper, brass and sensitive metals. It is therefore NOT for use in delicate electrical or electronic applications. However, there is an electrica
Electronics Forum | Tue Sep 05 11:39:52 EDT 2006 | blnorman
We use silicones - better high temp for underhood. For environmental reasons we haven't used acrylics or urethanes, but would like to try them. Silicones don't like underhood fluids and are permeable to moisture. We also have the problem of UAW wo
Electronics Forum | Thu Oct 08 08:15:39 EDT 2009 | kpm135
We've used both 1A33 urethane and 1B31 acrylic coating on our SMT assemblies with great success for many many years. This is with components of all shapes and sizes including a 9 ball micro-BGA. We apply the coating in every way imaginable and we hav
Electronics Forum | Fri Feb 18 12:00:08 EST 2011 | dennisfo
That has also been the standard here. We have a urethane line which pulls a vacuum on the mixture before transfering to the can. I plan on testing this out before receipt of the 73 thinner. I've also received some feedback with indication that the mi
Electronics Forum | Mon Jan 28 08:44:21 EST 2013 | diamondmt
John, In addtion to the cleaning process you may wnat to look at the masking materials you are using as well. Are you using any temporary masking tape? If so, do the dewetted areas coincide? Some of these tapes use a silicone-based adhesive which wi
Electronics Forum | Thu Aug 28 12:42:53 EDT 2014 | mcapizzi
One camera is used with typically one of the following prism set-ups: The split prism system, in its most common form, is a cube made from two triangular glass prisms which are glued together at their base using polyester, epoxy, or urethane-based ad
Electronics Forum | Mon Apr 18 19:58:22 EDT 2022 | cbeneat
I had the same question. We have custom nozzles made by Count on Tools. I believe we found urethane works the best for the silicon domed LEDs. Have you slowed the feed rate down on the feeder? Also adjust the top tape to the back slot on the feeder.
Electronics Forum | Fri May 13 22:16:16 EDT 2022 | alex22
Indeed, stickiness of LED dome varies from batch to batch. We didn't have much success with adjusting pick&mount settings. Also, usage of other nozzle (recommendation from SMT manufacturer) didn't help. Usually, we have a good experience with similar
Electronics Forum | Wed Jun 24 00:10:07 EDT 1998 | Phillip Hunter
| WHAT IS THE BEST ANGLE FOR THE SQUEEGEE BLADE TO BE ANGLED AT? WE ARE USING 45 DEGREE ON OUR POLYURETHANE BLADES, AND I BELIVE WE HAVE THE OPTION OF EITHER 45 OR 60 DEGREES ON OUR METAL BLADES. WHICH OF THE TWO IS BETTER, OR SHOULD WE BE USING AN
