Electronics Forum | Wed Mar 15 11:34:28 EDT 2023 | proceng1
I'm sure this isn't the same situation, but we did have a selective solder machine with crazy dross and solder ball build up. Turns out the operator switched the low pressure nitrogen line used for solder level and the high pressure nitrogen line fo
Electronics Forum | Mon Mar 13 21:21:40 EDT 2023 | joeljacobo
Hello colleagues, I appeal to your expertise in this matter that has taken me by surprise. A week ago it was decided to change the solder brand for the wave machine, (only the brand, the alloy is the same). The pot was emptied and filled with the
Electronics Forum | Fri Feb 18 08:08:55 EST 2011 | floydf
I have found that depressurizing the tanks when the machine is not in use reduces bubbles.
Electronics Forum | Tue Mar 01 15:07:00 EST 2011 | dennisfo
Update on 1B73 bubbles, Changed over to a mixture of Humiseal 73 thinner with coating (25 sec on Zahn 2) observed a reduction in bubble formation (approx. 20%) but still present.
Electronics Forum | Tue Jan 24 10:24:18 EST 2006 | kmorris
We've got a problem here, where we're hand spraying a urethane conformal coat on over a rectangular inductor. The inductor body is a plastic tube, with potting to fill. The top is not always flat (sometimes concave). The problem is that bubbles appea
Electronics Forum | Tue Mar 01 15:33:35 EST 2011 | jlawson
If I assume you running a selective coating machine ? Maybe you have small leak and system is sucking in air creating bubbles in mixture, like a sort of venturi action, just idea, can be a faulty fitting , elbow etc. Have had this before....
Electronics Forum | Tue Feb 08 14:23:47 EST 2011 | dennisfo
Conformal coat bubbles using 1B73 and SC-205 nozzle I've read most of the posts on this subject. I'm using the SC-205 (airless) fan nozzle and 400 needle to apply 1B73 mixed with xylene thinner. I have micro bubbles which come directly out of the noz
Electronics Forum | Tue Jan 24 12:29:45 EST 2006 | patrickbruneel
Contact Graham Naisbitt he is an expert in this field. Graham.Naisbitt@concoat.co.uk
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 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
