Electronics Forum | Mon Dec 06 17:02:52 EST 1999 | Michael Stewart
Have you ever tried using a vision system for measuring the part placement accuracy and then clacualting the Cpk's from these results, or do you strictly use the machine vision itself? My concern with using the machine vision is that it it is biased
Electronics Forum | Tue Apr 08 18:15:14 EDT 2003 | kent_peterson
Running the PAM board is a great tool. Using another machine to get you CPK is very inportant. We use the DT651 which does everything the PAM rom card does plus it gives a CP and CPK value. You can also use it to verify feeders in the X and Y. SMT re
Electronics Forum | Sat Feb 10 09:36:52 EST 2007 | davef
Choices are: * Run a Cp, Cpk capable profiler through the oven. * Review the results of your supplier's process qualification that would include Cp, Cpk on their oven. Handspring contract [REV. 6 - 7/1/99] with Flextronics says: [snip] 4. Process Ca
Electronics Forum | Wed Feb 24 21:01:34 EST 2010 | davef
You're correct, CPH doesn't mean dip. You want: * Perfect parts. * On-time delivery. * Cpk ~2 each quarter * Zero lost machine time as a result of product change-over. ... Right?
Electronics Forum | Mon Mar 10 15:52:26 EST 2003 | eagle-eyed-one
Hello Neil, I absolutely agree with the conclusion of limits as you have stated. There are 2 sets of limits in which machines can be measured against for compliant performance. First and most critical being the quality performance specification limit
Electronics Forum | Thu Jan 16 16:04:31 EST 2003 | MA/NY DDave
Hi Well I don't agree with Mr Fox. Cp and Cpk i.e Capabilitiy studies always yield good results and add vigor to the engineer and the process. You might want to hire a consultant or go to some classes to make sure you do this correctly for your si
Electronics Forum | Tue Feb 06 11:07:43 EST 2001 | cjrjmj
I am looking for some assistance with placement accuracy studies for chipshooters(Fuji CP4-Cp642) and platform machines (GSM all configurations, Siemens HS50/S25). I would like some information on companies and recommendations on process of evaluatin
Electronics Forum | Wed Feb 07 09:57:50 EST 2001 | cjrjmj
I did a quick some quick searches for Accuspec and saw some links to a PCB manufacturer. Is this the same company, or do you know the #?? I am not really in the equipment evaluation mode. I am looking for a system that will assist in maintaining cap
Electronics Forum | Mon Mar 03 11:06:13 EST 2003 | msivigny
Hi floydl, I completely understand when it comes to data crunching after long hours of performing measurements, it's the last and most important arduous task in obtaining performance data. If a measurement and evaluation process that traditionally to
Electronics Forum | Thu Mar 06 12:15:00 EST 2003 | msivigny
Hello Dave, First you must make sure your measurement system is calibrated for accuracy, repeatability and reproducibility. We perform a standard GR&R Study on our CmController system on a regular basis to ensure that the system itself is capable to
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