Electronics Forum | Mon Jul 01 13:57:58 EDT 2013 | wpierowski
Recently on one product, I found a white residue on the solder joints only that is more of a gray in color. Our lab told us it was a tin oxide with an unknown organic. This is with a lead free OA paste and it only shows after wash. Has anyone seen
Electronics Forum | Mon Jul 01 15:40:12 EDT 2013 | davef
Walter: The things I'd look at first are: * Temperature of the water wash. I expect the solution to be in the 140-150*F range [Check with your flux supplier for recommended temperatures] * Temperature of the boards when entering the cleaning process.
Electronics Forum | Mon Jul 01 16:34:46 EDT 2013 | wpierowski
So that is common when the temp on the wash is high? The temp was adjusted for a flux that required a higher temp. How much of an issue is this tin oxide?
Electronics Forum | Tue Jul 02 11:26:12 EDT 2013 | bobpan
Your autoexec.bat and config.sys probably have problems. There is a line for the apwrk that needs to be in autoexec.bat. go to: www.precision-repairs.com and e-mail me....much easier that way
Electronics Forum | Tue Jul 02 15:14:34 EDT 2013 | cbeneat
Does anyone have a Maintenance tracking program they'd be willing to share? Don't need anything fancy, my company is having a system set up, this could be awhile, so was looking for something in the interim. Thanks
Electronics Forum | Wed Jul 03 03:02:35 EDT 2013 | autoel
How to test the reflow solder joint shear strength? What are the specification to test solder joint shear strength? What are the different methods to test the solder joint shear strength? Vijayashree
Electronics Forum | Thu Jul 04 17:17:00 EDT 2013 | processman
Hello, Hoping for some recommendations for how its best to selective solder clinched PTH components.. We are using Ersa equipment. Problem we are having is some of the leads are holiding `blobs` of solder on their leads. Have tried single dot
Electronics Forum | Thu Jul 04 23:14:20 EDT 2013 | mbeauregard
Does anyone have a printable ruler for measuring smd/smt tape and reel components? I currently have one that measures 2 pitch and 4 pitch but it is small and only measures up to 75 parts at a time. I would like one to also include 8 pitch.
Electronics Forum | Sun Jul 14 21:09:59 EDT 2013 | isd_jwendell
"So why is the number of wraps = (Outside diameter - inside diameter) / twice the the thickness of the tape" 2*thickness because we are using diameter
Electronics Forum | Wed Jul 24 13:41:17 EDT 2013 | ericrr
To give a better idea of how to calculate the amount of parts on a reel, one might like to survey the attached diagram it is very simple, the extra parts per layer follow a linear fashion.
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