Electronics Forum | Wed May 04 11:34:17 EDT 2016 | swag
Nice! I always thought of programming as a little bit of facts to get it running then a lot of lies to make it work right.
Electronics Forum | Thu May 12 14:03:38 EDT 2016 | chemers
Does anyone have an equipment recommendation for stencil cleaner brand/type that they would recommend for no-clean pastes? I have used ultrasonic cleaners in the past with aqueous pastes, but I don't want to buy something that really won't work for u
Electronics Forum | Wed Jun 01 19:37:15 EDT 2016 | marcelll
You can try to null the axis, it's working sometime Also, lower the acceleration to 2000 instead of 4000 and the max velocity to 350 instead of 508. You can also try to swicht the Y1 driver with Y2 driver Do you have the AMC disks to troubleshoot ?
Electronics Forum | Mon Aug 22 10:30:42 EDT 2016 | emeto
Thanks for your help. We did call tech from Speedline and he got it fixed and working by exchanging just a few parts. There were a lot of custom modifications on this machine, don by who knows who and where, but the guy was very competent and fixed i
Electronics Forum | Fri Jun 03 10:04:51 EDT 2016 | sara_pcb
I am planning to attach 1760 pin BGA. The pitch is 1mm and Balls are SAC alloy type. The PCB is for aerospace use and expected to work in harsh environment. What is the recommended PCB surface finish and the attachment process for such a applicatio
Electronics Forum | Sun Jun 12 09:29:41 EDT 2016 | davef
I'd guess that the interconnect pads on the BGA have poor solderability. Confirm this with testing at an independent lab. Work with your supplier to resolve the issue.
Electronics Forum | Wed Jul 13 11:59:06 EDT 2016 | emeto
Moisture before reflow is consideration, because damages parts and boards in the reflow process. It is all about this water expanding as gas and cracks part or causes PCB delamination. Moisture after reflow is still affecting the work of the product
Electronics Forum | Thu Jul 14 08:26:15 EDT 2016 | emeto
Here is some more information: "Moisture can increase the dielectric constant, leading to changes in impedance, switching speeds and propagation delay times. " I am not sure if you can accurately measure any of these on your assembly but it looks li
Electronics Forum | Thu Jul 21 11:54:03 EDT 2016 | davef
Water washable no-clean flux works fine. Acetone, eew!!!
Electronics Forum | Wed Jul 27 10:49:02 EDT 2016 | davef
can't troubleshoot fault => oops, we skipped MDA maintenance => never mind Glad that it worked for you.