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 | Wed Aug 21 17:50:05 EDT 2002 | davef
First, it�s GREAT that your defect rate of 282 is very close to your Boss� goal of 50 ppm. Second, your Cpk and your ppm numbers don�t tie out with our expectations. You say Cpk for: * mounter is 1.0 and �your mounting is 83ppm�. * printing is 1.33
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 | Wed Aug 21 01:40:42 EDT 2002 | jkhiew
Hi all, Our management set target 50 ppm for overall process like printing,mounting & reflow soldering. Our m/c cpk for mounter is 1.0 & for printing is 1.33. So, pls comment !
Electronics Forum | Wed Aug 21 18:11:47 EDT 2002 | dragonslayr
..and the choir is humming in 5 part harmonies. Personnally, I never gave much truck to Cpk stuff. Seems to be a high falutin way of showing the lowerlings that academics can manipulate numbers. Dazzle 'em with brilliance or baffle 'em with bull puke
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 Dec 06 14:59:37 EST 1999 | Brian W.
Cpk is sometimes referred to as the voice of the process because it is measuring how tight your process is in relation to the specification limits. A Cpk of 1 means that you are running a 3 sigma process (plus or minus 3 sigma). This means that you
Electronics Forum | Mon Feb 12 10:06:46 EST 2007 | CK the Flip Guy
DaveF, Please define a "Cp/Cpk capable profiler." Do you mean one that has software that automatically calculates this for you? I do this at my company, and we track 2 critical variables - Time Above Liquidous and Peak Temps. and this is done on a
Electronics Forum | Sat Jan 29 23:55:58 EST 2005 | KEN
I recently ran a process evaluation (Print/ P&P /Reflow) and was plesently surprised with a 5.0 sigma process or 250ppm. Attrition was under 1%. Keep in mind this is defects counted Post-reflow. The most signifficant defect was tombstoning / draw-
Electronics Forum | Wed Jun 06 02:59:11 EDT 2018 | buckcho
Mr. Evtimov, Koh Young and Parmi have this option in their SPC software. You can also choose either Volume, Area, position, height (both in um or %). Here is a screenshot from Parmi. Unfortunatelly i cant find my old Koh Young screenshots. Parmi has
