Electronics Forum | Mon Jun 22 16:33:59 EDT 2020 | davef
Measuring solder static paste viscosity is fairly easy to do. IPC TM-650 .4.34, Solder Paste Viscosity lists the method and equipment. Just don't tell your customer that it is meaningless because the solder paste is printed in shear, not statically
Electronics Forum | Tue Jun 23 05:48:17 EDT 2020 | ameenullakhan
Hi Sr Tech, Yes we do have a COC for every solder paste with viscosity measured. But some customers have there unique requirements. And its not useful arguing with them. Regards, Ameen
Electronics Forum | Wed Jun 10 04:00:46 EDT 2020 | ameenullakhan
Hi Phil, we used RSS profile initially , because of tombstone issue at 0201 package. We are planning to reduce soak a now to have flux till the end of reflow to avoid HIP now. and to support that . we are increasing over aperture opening also. Re
Electronics Forum | Fri Jun 12 05:56:53 EDT 2020 | sssamw
I cannot see the logic connection between HIP and RSS or RTS, or between HIP and solder paste volume because volume is ok. Did you measured the BGA solder profile?
Electronics Forum | Tue Jun 23 13:23:55 EDT 2020 | emeto
If you swear in having consistent print, I bet you it is the part. Some of these BGAs probably have missing or inconsistent balls.
Electronics Forum | Mon Jun 15 16:05:42 EDT 2020 | zgulkhan
Thanks Evtimov for appriciation. I did much work on this in C# but clueless I need some tutorial or little example for a simple webcam as many people using in openpnp. Thanks again and pleas don't mind my English.
Electronics Forum | Mon Jun 15 20:37:29 EDT 2020 | travishemen
Try sending your boards to rework before SMT and have them remove the excess solder from the fiducials. It usually works great until someone accidentally removes the entire fiducial.
Electronics Forum | Tue Jun 16 14:35:13 EDT 2020 | dwl
for the fiducials, try a donut shape instead of a disc. The HASL solder seems to settle more evenly on a donut than it does on a dic.
Electronics Forum | Sun Jun 14 19:38:34 EDT 2020 | compit
And what do you want to calibrate there? It is a very simple feeder. PS. Write the model exactly.
Electronics Forum | Sun Jun 14 19:41:35 EDT 2020 | yakout
hello michal have a nice day i need to adjust the pitch from 4mm to 8mm
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