Electronics Forum | Tue Mar 07 11:13:04 EST 2006 | Brian
Air Academy Associates has a nice SPC package that has the PFMEA calculations built in to it. It also does Cp/Cpk/regression analysis, MSA, et al.You can combine it with a reaally user friendly DOE software for about $250. Both use Excel. Brian
Electronics Forum | Mon Jan 31 07:01:56 EST 2005 | pjc
These guys http://www.cetaq-americas.com/index.shtml have the CmController that can do the measurement to back up the p&p vendor's claim. A CpK of 1.33 ain't bad. Would like to see 2.0. The picking is critical too. Ask vendors for pick accuracy and
Electronics Forum | Wed Oct 28 14:12:48 EST 1998 | Stefan W.
The only method I would trust measuring the cp or cpk is with an optical coordinate measuring machine used in metrology labs. The machine should have at least ten times better accuracy than the machine to be measured. For a print area of 18"X18" you
Electronics Forum | Mon May 08 01:47:56 EDT 2000 | Jack
Charles, I think the misplacement can be devided into 2 groups: 1. parts misplaced by machine 2. parts move as the X-Y table moves If you use the solder paster right, and the place force is properly setup, the second group will be definitely no exce
Electronics Forum | Tue Jan 30 17:36:59 EST 2001 | slthomas
Looking for recommendations for references on quality an process control.....SPC, process capability (cp, cpk), etc. My feet are a little wet on this stuff, but we'll be implementing soon so I'll need a reference to bail me out on occasion. You kn
Electronics Forum | Wed Dec 08 08:20:20 EST 1999 | Jerry Stafford
Michael, You need to know the measurement capability of whatever system you use to do your CpK measurement. Ideally you would do an error of measurement study of the measurement process. It is hard to imagine a measurement system that would err on
Electronics Forum | Mon Jun 01 00:46:14 EDT 1998 | S. S. Bist
We have few questions for BGA assembly. Specially with Fuji machines. 1. What are the testing mechanism other then X-rays. 2. How we get data from Fuji to check repeatability and reproducibility in terms of percentage and how it as calculated. 3. Do
Electronics Forum | Tue May 07 02:58:27 EDT 2002 | dwoon
Hi, We are looking for some measuring machines to evaluate the ability of a SMT placement machine to produce quality. We will mount some dummy components on a glass plate and then insert the assembly into the measuring system which can measure the
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 | Wed Jul 07 22:59:06 EDT 1999 | Dave F
| Hi! | I'm a process engineer attempting to do a capability study on our existing convection reflow oven - Heller 1500. It was recommended by an independent consultant to do at the very least, load testing, process ready testing, and board uniformi
