Electronics Forum: defect rate (Page 1 of 26)

AOI False call rate vs defect rate PPM

Electronics Forum | Fri Jun 07 14:05:39 EDT 2024 | davidk

I wanted to open a discussion and ask about opinion: What is a normal result of the inspection of an AOI? How many falls calls per component /opportunity is bad/normal/good? How many defects per component/opportunity is bad/normal/good? What is goo

AOI False call rate vs defect rate PPM

Electronics Forum | Wed Jun 19 14:40:58 EDT 2024 | davidk

Hello Carl, Thank you for your comment Obviously, we are evolving and debugging our test to get the best results ("no escapes no false calls") :) and using a combination of 3D and 2D tests. With the previous AOI, we had a much higher false call rate,

AOI False call rate vs defect rate PPM

Electronics Forum | Wed Jun 19 15:28:58 EDT 2024 | davidk

Hi Tom, Thank you for your comment 75% FPY is also our target, cause we gonna have the AOIs in the SMT line. So you would expect more opportunities? I didn´t notice but there are not so many components with high opportunity rate. (the average numbe

AOI False call rate vs defect rate PPM

Electronics Forum | Thu Jun 13 08:10:51 EDT 2024 | carl_p

You would need to be more specific on the AOI in question here. 2D, 3D features will also have a big impact. Are you constantly evolving or updating the models to improve the situation or going from just the base program as if low volume it can be a

AOI False call rate vs defect rate PPM

Electronics Forum | Thu Jun 13 14:41:40 EDT 2024 | tommy_magyar

Hi David, In one of my previous jobs I worked as an AOI/AXI process engineer and we had a set target of 75% FPY. This means that 75% of the boards at IPC Class 3 standards would not have a single false call. This also means you would need to set y

How to improve the rate of defect of automotive PCB?

Electronics Forum | Fri May 03 21:56:31 EDT 2019 | pcbindex1

How to improve the rate of defect of automotive PCB?

How to improve the rate of defect of automotive PCB?

Electronics Forum | Sat May 04 12:43:48 EDT 2019 | davef

ISO/TS 16949 is a quality management system for automotive sector

Pick failure rate

Electronics Forum | Mon Sep 16 13:29:37 EDT 2013 | larrygroves

a lot depends on the age and type of equipment you are using . Older equipment can have a lot of problems with smaller parts. If all is well with your feeders and machine you should expect something like 99.8 to 99.9 percent. some parts will be ident

BGA rework rate

Electronics Forum | Fri Feb 11 02:42:17 EST 2005 | marakas

Thank you very much for your answer. We had: 1- 224 pins, size 19*19 mm, pitch 0.8 mm 4- 48 pins, size 11*7 mm, pitch 0.75 mm 1- 160 pins, size 15*15 mm, pitch 1 mm 1- 196 pins, size 15*15 mm, pitch 1 mm How many defects I should expect with th

Tombstone defect

Electronics Forum | Wed May 21 12:55:35 EDT 2003 | Zhenya

Several things for your reference: 1. Starting with data collection: - Have you done a measle chart to illustrate the pattern of the defect? - Have you checked the corelation between shift/time and defects rate? - How about a pareto chart? - Do

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