Electronics Forum | Sun Mar 02 17:02:52 EST 2008 | davef
We have talked about Cpk many times here on SMTnet, discussed source of glass slugs for placement assessment, and talked about placement Cpk a few times. Search the fine SMTnet Archives to find those threads to provide you with additional background.
Electronics Forum | Sat Mar 01 12:53:07 EST 2008 | iantech
many thanksthis looks really helpful
Electronics Forum | Mon Mar 03 11:33:43 EST 2008 | shrek
KRIKIES, CK me lad, are you implying that the fella massage the numbers a bit?
Electronics Forum | Fri Feb 29 09:51:39 EST 2008 | iantech
Guys I am trying to measure the placement repeatabilty of my placement machines, and I was wondering if you guys had any usefull excell tools you have developed along the way that might help me input the figures so my bosses can understand ian.
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 | Fri Feb 29 14:58:35 EST 2008 | ck_the_flip
Here is a useful website that defines Cpk: http://www.itl.nist.gov/div898/handbook/pmc/section1/pmc16.htm For placement equipment, the manufacturers typically give you a glass plate, where the intent is to measure how far off the centroid you are
Electronics Forum | Mon Mar 05 11:24:16 EST 2007 | samir
Something the "placement guys" don't tell the customers... Cpk is an easily "massagable" number. You just take some data points and reduce the variation a bit, or even play around with your spec limits, or a combination of the two to get the highes
Electronics Forum | Tue Jul 03 09:57:25 EDT 2001 | johnw
Hi guys I am looking for any info on cpk values IE fcp6, fip2,fip3 What are the variables to consider for placement times and part sizes. Cheers
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 | Tue Sep 08 14:09:09 EDT 1998 | Mike Demos
I am attempting to locate a kit to be used on surface mount equipment to determine the placement capability (CPk). Does anyone have information on where to purchase such a kit? Ideally this kit should be usable on placement equipment from various s
