Electronics Forum: false call rate (Page 1 of 28)

false call rate calculation AOI

Electronics Forum | Sat Jun 26 02:32:32 EDT 2010 | prinsisgarcee

how do i calculate false call rate? i got this equation = [over reject / (total solder joints + components) ] * 1000000 and i got a table which shows data like number of solder joints, components on panel, and number of false call, and the false

false call rate calculation AOI

Electronics Forum | Tue Jun 29 11:46:36 EDT 2010 | davef

Prins: Everyone has equations. Here's one some people use: False call rate = [Number of defective boards, but good at inspection]/[Total number of boards produced] Why don't you ask the people [that calculated the numbers that confuse you] how the

false call rate calculation AOI

Electronics Forum | Fri Jul 09 19:20:49 EDT 2010 | rway

This table, is it in a database? And is it indicating the number of component, solder insp. etc based on one board or one panel? It needs to be based on the total number of inspection on your panelized pcb. The equation works, you may just be look

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 | 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 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

YesTech F1 AOI false calls and misses

Electronics Forum | Mon Apr 02 09:57:18 EDT 2012 | vparis

Our company is having issues with our YesTech F1 AOI machine the programs are currently not utilizing this machine correctly. we are have a false call rates of about 5% to as high as 12% of the total number of inspection points. I have started to rep

YesTech F1 AOI false calls and misses

Electronics Forum | Wed Apr 04 13:33:12 EDT 2012 | rway

We currently have 2 M1 systems. Our false call rate has never been has high as you suggest. There is something wrong with your program and/or inspection algorithms, as you probably already know. You should be somewhere between 1000-1500 vcpmo (fal

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