Electronics Forum | Fri Aug 27 13:34:25 EDT 1999 | Brian Larson
If your through holes are overlarge or the anular rings too small, the surface tension of the wave may exceed that of the joint. I would look at the design. You may want to put a strip of kapton tape on the following edge of the panel to test the "
Electronics Forum | Fri Aug 27 14:38:54 EDT 1999 | Doug
Brian, Thanks for the input. The hole size is good but the anular ring is small. I have helped the condition by reducing the clinch on the LED's. This I believe is reducing the pull out path. Thanks again | If your through holes are overlarge or th
Electronics Forum | Fri Apr 27 11:24:53 EDT 2007 | realchunks
Hi Steve-O, Good question(s). This process was set-up by an engineer that had a PhD in statistics, took him a year to develop and then thru it over the wall at us. The biggest problem we saw was SPC to measure solder volume. SPC is good for measu
Electronics Forum | Thu Nov 19 14:38:49 EST 2009 | doremi
Oh, my dear, printer is just a part of the full picture. Without good and stable pick and place what if the printer is excellent???It is all important - printer, solder paste,stencil,P&P,oven,AOI and of course good process engineers or whatsoever are
Electronics Forum | Wed Aug 30 16:00:42 EDT 2000 | Dave F
Russells: You can mix the two solders you mentioned, assuming by "96s" you meant "96Sn / 4Pb". If you heat the two tin / lead alloys to a liquid state, you�ll form a tin / lead solution with properties different from either of the two solders. The
Electronics Forum | Tue Jul 29 12:51:40 EDT 2008 | grics
I am having some problems with some of my pcbs at ive solder. We are using an ersa versaflow. It has an automated spot/spray fluxer (Interflux Pacific 2009M) , 1 preheat stage, a leaded pot/nozzel, and finally a lead-free pot/nozzel. Nozzels move, b
Electronics Forum | Sat Jul 29 00:44:30 EDT 2000 | Jason
Thanks for all the ideas. I tried solder "thieves" by placing some desoldering wick behind the briging pins and it worked! I have yet to try Chrys' idea but I will first thing Monday. This is a new board that has had this problem from day one. I
Electronics Forum | Fri Mar 02 08:52:20 EST 2001 | markkrmp
Are your voids looking like blow holes also? Is this only occurring on the solder joints of the Thru Hole components and Via's? Or does this happen on SMD pads? My experience is that we have seen this but only with some of our older PCB's which are
Electronics Forum | Thu Mar 22 16:35:06 EST 2001 | Steve
Deja vu! When I read your response I turned around to see if you standing behind me listening to our problem. We currently make about 50 different boards all using no-clean that have no problems, yet this newest boards has a couple of issues that eng
Electronics Forum | Wed Dec 18 10:10:07 EST 2002 | davef
No, sorry not on "Dave's Bookshelf". My basis is a study done at IBM. I reference it here: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=4941&#Message19050 Responding differently, you're correct. If you have a
