Electronics Forum | Fri Oct 15 11:32:04 EDT 2010 | patrickbruneel
Inspecting for plating problems shouldn’t be part of incoming inspection. Your board manufacturer should have the appropriate process control. I shouldn’t have said barrel cracks but plating skips. Plating skips are caused by dull drills or a too hi
Electronics Forum | Fri Oct 22 19:34:56 EDT 2010 | hegemon
Thanks for the help guys. Nice to think I was basically on the right path. PCB manufacturer has finally conceded the barrel defects and is remaking the PCBs. We are big on pre-tinning the leads of TH connectors as well as providing some good pre
Electronics Forum | Thu Oct 14 17:10:37 EDT 2010 | hegemon
Heck, now I look up and see this is SMTdotNET. Do I get banned for asking a TH question? So here's my first real TH issue after living so long in the SMT world. We are having a sudden issue in what has been a stable process for quite some time. I
Electronics Forum | Thu Feb 02 11:01:57 EST 2017 | charliedci
Maybe increased barrel fill? Raising pot temps slightly seems to increase barrel fill at selective solder, something we battle with.
Electronics Forum | Fri Oct 17 16:31:53 EDT 2014 | dyoungquist
Per IPC-A-610D: Target is 100% vertical fill but 75% vertical fill is acceptable for Class 1,2,3. Only needing 75% fill of the barrel when soldering plate through on an 0.093" thick board with our selective solder has been a life saver at times.
Electronics Forum | Wed Oct 17 12:05:08 EDT 2018 | charliedci
We had a selective solder installation tech raise the connector body off of the PCB slightly with a spacer to allow for a visual inspection to verify the process/profile. A few years back we invested in a large enclosure X-ray with a manipulator arm
Electronics Forum | Mon Dec 11 20:44:37 EST 2006 | davef
Title : LEAD-FREE WAVE SOLDER FLUX EVALUATION Author : Michael Havener Author Company : Benchmark Electronics, Inc Date : 09/25/2005 Conference : SMTA International Abstract : The European Union�s deadline to ban lead in electronic pr
Electronics Forum | Mon Nov 27 17:33:25 EST 2000 | Dave F
Ramon: I guarantee you there is corrosion on the solderable surfaces of your board. The issues are: * Flux selected is capable of removing the corrosion at hand. * Processes for applying the flux and soldering the board are effective for the sele
Electronics Forum | Mon Oct 03 11:33:09 EDT 2011 | artposada
I have been getting solder balls on the leads of a transformer that I am soldering to my pc board. My parameters are listed below. The board PTH's are .039 The transformer leads are .0255 square. My solder pot temp. is 310C Solder is Lead Free AIM
Electronics Forum | Fri Oct 04 16:08:28 EDT 2013 | hegemon
Same idea but simpler execution. Verify Solder pot temperature. Verify Temperature of Solder as it leaves the nozzle. Verify preheating gets your PWB up to 90C-120C prior to soldering. Check machine speed, verify 4 seconds contact with solder at
