Electronics Forum | Tue Aug 28 16:44:27 EDT 2001 | davef
Several points are: * Some may argue that DPMO is peculiar and specific. That�s why IPC-7912 states �Users of this document are cautioned when comparing one manufacturer�s indices to one another due to differences in assembly complexity and the amou
Electronics Forum | Thu Sep 13 13:29:06 EDT 2001 | mparker
Dave et al, I just print out and read a copy of the aforementioned recommended article. Mr. Mangin gives a clear picture of why DPMO is to be considered a more pure data than First Pass Yield (FPY). However, I must note that his interpretation of h
Electronics Forum | Fri Sep 06 00:29:24 EDT 2002 | TLe
Peter, QC-calc: Verifying vision accuracy of your printer with calibration stencil and hundreds of repeats. If your boards are large and specially if you have finepitch parts on them you will find usefully to use QC-calc to measure board stretch/sh
Electronics Forum | Wed Jan 26 12:56:36 EST 2005 | patrickbruneel
Rob, Check these links as a starting point http://www.calce.umd.edu/lead-free/longterm.htm http://www.calce.umd.edu/lead-free/tin-whiskers/
Electronics Forum | Thu Sep 11 11:34:52 EDT 2008 | patrickbruneel
Interesting observation Manuel. I will be blamed again for crying wolf but look below a lot more defects will soon see the daylight all related to lead-free. This information was posted at the tin whisker forum by Bob Landman of H&L Instruments.
Electronics Forum | Fri Jan 17 11:21:01 EST 2003 | Brian W.
You can Cpk numbers for the DEK using the QcCalc software. Simply connect a computer to the RS232 port on the DEK and follow the instructions. The program can give you Cp, Cpk numbers for a number of parameters, including X alignment, Y alignement,
Electronics Forum | Tue Oct 11 14:42:15 EDT 2005 | patrickbruneel
NASA website on Tin whiskers: http://nepp.nasa.gov/whisker/ NEMI Tin whisker activities: http://www.inemi.org/cms/projects/ese/tin_whisker_activities.html CALCE Tin Whisker Working Group: http://www.calce.umd.edu/lead-free/tin-whiskers/ Measur
Electronics Forum | Mon Jul 24 08:54:11 EDT 2006 | russ
20k per hour by MFG. spec. we use 60% of advertised speed for time calcs it usually ends up being quite close to actual. Russ
Electronics Forum | Thu Feb 03 07:39:24 EST 2005 | davef
The component orientation was just for the calculation. It has no affect on what you're seeing. As an alternate explanation, it's possible that difference in temperature is causing the board to flex in the z-direction [as you say, it may not be f
Electronics Forum | Thu Sep 05 11:49:24 EDT 2002 | ppwlee
Hello, I like to hear your comments on applying SPC to solder paste printing. Specifically: - What's the most common and effective method of automated moitoring and control, Paste height/volume or printer parameters? - Actual examples in applying
