Electronics Forum | Wed Sep 08 16:00:09 EDT 1999 | Mark D.
My company is looking to perform "real time" statistical process control on our current SMT operations. I have identified the critical processes for SPC but have not had much luck in finding a system(s) that can monitor the required processes for my
Electronics Forum | Fri Jan 30 14:32:45 EST 1998 | Mike C
| I am just implementing a Statistical Process Control to the SMD. | A few simple questions: | 1. Is it necessary to perform a sampling plan for suppliers inspection? | 2. What are the basical points to control ourself and inspection at a supplier? I
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
