Electronics Forum | Sun Mar 22 15:29:01 EST 1998 | Michael Fogel
What is the right way to count the opportunities for defects in order to calculate the quality (in ppm) of SMT assembly processes as well as the quality of the PCB's? Please replay to: fogel_m@netvision.net.il or micha.fogel@ecitele.com
Electronics Forum | Fri Mar 07 10:55:51 EST 2008 | slthomas
Not sure if you need help with the calculations or the application, so from the beginning: d=defective parts, p=number of parts, dpm=defects per million parts In a nutshell, d/p=dpm/1000000, so dpm=d/p*1000000 We use dpmo (defects per million op
Electronics Forum | Wed Mar 25 21:49:32 EST 1998 | Alberto Cervantes
| What is the right way to count the opportunities for defects in order to calculate the quality (in ppm) of SMT assembly processes as well as the quality of the PCB's? | Please replay to: | fogel_m@netvision.net.il | or | micha.fogel@ecitele.com
Electronics Forum | Tue Mar 24 09:53:01 EST 1998 | Steve Schrader
| What is the right way to count the opportunities for defects in order to calculate the quality (in ppm) of SMT assembly processes as well as the quality of the PCB's? | Please replay to: | fogel_m@netvision.net.il | or | micha.fogel@ecitele.com Ch
Electronics Forum | Sat Sep 14 16:35:47 EDT 2024 | yannick_herzog
Defets per million opportunities: Number of defects per million inspection opportunities. It is best to ask your manufacturer how your machine calculates it. We use the defective parts to calculate the PPM. Kind regards
Electronics Forum | Tue Oct 06 15:41:14 EDT 1998 | Mike C
| | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | DPM is Defects per million, usually measured on components. We run a process consisting of small to medium b
Electronics Forum | Mon Apr 17 18:29:03 EDT 2006 | lit
There is learning on all brands requiring fine tuning the test parameters. The first point is not to allow defects to escape. Many brands can do a good job with preventing escapes. The struggle with all the brands becomes false calls. The companies r
Electronics Forum | Wed Oct 07 06:19:30 EDT 1998 | Charles Stringer
| | | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | | DPM is Defects per million, usually measured on components. We run a process consisting of small to medi
Electronics Forum | Thu Oct 08 22:06:44 EDT 1998 | Eric R
| | | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | | DPM is Defects per million, usually measured on components. We run a process consisting of small to medi
Electronics Forum | Wed Nov 18 11:03:45 EST 1998 | Scott Lolmaugh
| | | | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | | | DPM is Defects per million, usually measured on components. We run a process consisting of small to
