Electronics Forum | Wed Jul 04 12:22:07 EDT 2001 | davef
Several points: * Consider that your Cpk is probably different for both placing large and small components. * Probably your routine placement rate SB the speed you use to monitor the accuracy of your process. * Some people use a calibrated glass test
Electronics Forum | Mon Mar 03 23:20:24 EST 2008 | daxman
I may suggest talking with the fellas at SMT Research. They have an awesome tool (POD) that can measure it for you if you're interested in having them do it. From my experience, they are always willing to talk with you over the phone too, so I'd ima
Electronics Forum | Mon Jan 17 12:16:02 EST 2000 | Brian W.
My old company (CM) ran SMT to 50ppm including some very complex boards. We established the normalizer number by: #components + #solder joints. As was stated earlier, the ppm for any given product is the result of many factors. You may get differen
Electronics Forum | Wed Jan 08 17:46:34 EST 2003 | ricardof
I would like to know how to implement CPk study on SMT line At this time we have the application to calculate CPk on Chip Placers for X and Y axes repeatability, but I'm trying to find what should I calculate on my Oven and paste printer in a simple
Electronics Forum | Wed Dec 13 16:12:01 EST 2000 | C Dooley
Is it possible to find the Cpk value for attribute data? We are running into problems due to unspecified LSL/USL values. How can we find the Cpk values without specific LSL/USL? We would also like to get some reference books on this subject so any
Electronics Forum | Mon Jan 31 01:36:43 EST 2005 | timekey
Dave- Excuse the shameless self promotion but we market a product that does just what you are referring to...measuring Cp and Cpk levels on SMT equipment. If you've ever had the desire or need to gather this data on your in-house SMT equipment pleas
Electronics Forum | Wed Dec 20 14:52:38 EST 2000 | susan
For attribute data, the process capability is reflected by the process average nonconforming (e.g.p bar). Reference the automotive group's AIAG SPC Manual. Hope this helps, Susan
Electronics Forum | Fri Jul 04 19:39:08 EDT 2003 | AlCapone
i'm newbie to this forum, I have a question about Cp and Cpk, nowaday, what number of ppm your company targets. Also as a SMT engineering you guys operate the whole smt line from SPM to ICT, has your company let you calculate the Cp and Cpk or there
Electronics Forum | Tue Jul 08 18:37:54 EDT 2003 | MA/NY DDave
Hi AlC, Q: Who calculates Cp, Cpk. It depends on the company, it's size and structure. Some expect the SMT / Process Engineer to do this work and others have all kinds of other groups involved. YiEngr, MA/NY DDave
Electronics Forum | Wed Feb 16 14:30:51 EST 2005 | DasonC
What kind of SMT equipment? Can U preform the Cpk study on the P&P to check your accuracy of your equipment? Otherwise, check noozle and any component jamp into the equipment. We did experience with chip jamp in the conveyor and can't hold the boa
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