Electronics Forum | Mon Mar 04 17:54:06 EST 2002 | davef
We do not use IPC 9850. �The stated purpose of IPC 9850 is �to standardize the way machine vendors specify placement rates with specific accuracy requirements for different components�. It also provides a form to record the test results, which inclu
Electronics Forum | Sun Mar 02 17:40:02 EST 2003 | MA/NY DDave
Hi It sounds like you are in a different country or in the USA a long time ago. I have no idea of the process either is using, so they can be comparable or one can be better than another and lop sided compared to other places. Benchmarking I think
Electronics Forum | Fri Mar 07 08:47:45 EST 2003 | msivigny
Hello Peter, In reflow, running a profile and collecting thermal data does not necessarily make it easy to calculate and determine machine capability. On the contrary to your desires of simplifying the process, determining machine capability on an ov
Electronics Forum | Fri Nov 28 04:16:33 EST 2003 | stoney_tsai
Hi, all, I have done an analysis through Statistics on solder volume whose purpose is to identify the required volume for different pitch printing (0.65 or above, 0.50, and 0.40 mm). Finally, came out a regression model. But, I need to evalua
Electronics Forum | Thu Mar 24 13:29:50 EST 2005 | chunks
3-5 degrees between two different boards is not that great a deal. It could simply be a combinations of the t-couple and where/how it's mounted on each board. It could be related to the metal or it's thickness, depending on your layout. Over all,
Electronics Forum | Mon Sep 12 12:22:10 EDT 2005 | Rob
Then he's a very naughty man! Advantis with Lightning head: Chip Accuracy +/- 68uM @ 3 sigma CP643: +/- 66uM @ 3 sigma CP842: +/- 55uM @ 3 sigma I know specs are just statistics but both our Fujis & Universals still calibrated to well within the m
Electronics Forum | Fri Feb 17 14:54:45 EST 2006 | Baer
We have a great deal of new reliability data and we are preparing a full document that shows the statistically valid reduction in solder related defects as well as the improved throughput. It will include all of the SIR test results which are all goo
Electronics Forum | Wed Feb 15 19:20:46 EST 2006 | Mr. Samir
Russ, On both instruments, I ran them through the wave 20 times each using identical profiles and wave parameters, and then used statistical formulas to measure the variation and repeatability of each. I had these all in Excel, but that was around 1
Electronics Forum | Mon Mar 26 21:30:24 EDT 2007 | davef
Welcome back Comments are: * There's a lot of bla bla bla about using statistical measures to determine calibration intervals. It's all over the web. * MIL-STD-45662A Calibration Systems Requirements - WITHDRAWN [Notice 2, Dated: 27 February 1995]
Electronics Forum | Fri May 18 09:03:12 EDT 2007 | gregp
Don't confuse cost of ownership and cost per placement. They are two different entities. Also, it's not enough to say it...it needs to be true. One supplier claims "low cost of ownership" but has equipment that requires $700 placement nozzles. I'
