Electronics Forum | Thu Dec 12 17:48:21 EST 2019 | davef
You proved that the standard solderability test of components may be effective for assessing aged components. Curious Minds Can you get the authorization to use a more aggressive flux? Will that flux solve the problem? What's it going to cost to qu
Electronics Forum | Fri Dec 20 17:09:52 EST 2019 | slthomas
I agree, that is not a gullwing lead in the normal sense but that doesn't address the failure. The wetting looks fine unless there is a problem under the lead, which is hard to tell since there is an obvious fracture. That appears to be the edge o
Electronics Forum | Thu Dec 26 20:35:48 EST 2019 | luciano_zhang
I have design some PCBs but last time I met one problem they said missing the solder mask ...any one can give some suggestions why do some pcb manufacturers reject gerbers due to missing sodermask?
Electronics Forum | Fri Dec 27 14:27:40 EST 2019 | slthomas
We switched to a REL0 T3 paste, Amtech LF-4300. It wets the castellations more consistently. I believe that in our case it was more of a plating wetting issue with the parts, but yours sounds more like a pcb finish or thermal issue. That larger pad
Electronics Forum | Fri Jan 10 03:57:37 EST 2020 | jakapratama
Hello, When I calculate based on the data you gave, your stencil aperture area compared to pad area is 94.52%. Your aperture area ratio is 1.76 using 5 mils thickness foil. OK, your stencil and your paste release is not the culprit here. Your proble
Electronics Forum | Thu Jan 30 20:41:05 EST 2020 | sarason
A solution that could placed on any machine is a first check that places a component in a fixed location and then the 2 pin component is read with a meter like a HP component measuring system. Similar for transistors and FETS. IC's are probably not s
Electronics Forum | Thu Feb 13 03:54:57 EST 2020 | majdi4
we are obliged by customer specifications that there will be no glue despensing process on the production line.. also that the glue dispensing process is very complicated for this case .. we could have glue splash on top surface of pcb so that will
Electronics Forum | Wed Feb 12 14:14:42 EST 2020 | alvarez94
I am running a MYDATA MY19 machine.the problem is that the first 2 hours after turning on the machine it does not work throwing the following error: "transducers do not agree". After approximately 1 or 2 hours the machine starts working normally. T
Electronics Forum | Mon Mar 09 16:30:42 EDT 2020 | sportsradar
We have the software and our PC has been running the machine for approx 10 years. I just don't know why all of a sudden it decided to have this problem. :( Also I have the software if you think I can reinstall from the diskettes. Will check, and ag
Electronics Forum | Tue Mar 24 10:34:03 EDT 2020 | slthomas
My experience with our process is that those parameters would result in a big bridging problem. I'm working with a stencil designer at our fabricator on an asymmetrical aperture design that hopefully balances forces enough to keep the parts centered.
