Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

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Missing component benchmarking

HCC

#19090

Missing component benchmarking | 7 March, 2002

Hi y'all,

I know this could be sensitive information, but can I just start up a benchmarking sharing on the missing component rate in Fuji CP742 chipshooter? We've been seeing quite a few missing RLC components, and even some components that end up under the BGA parts. I would like to know what "world class" is for missing component defects on CP742.

Thanks! HCC

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CFraser

#19093

Missing component benchmarking | 7 March, 2002

If you are having problems with missing, misplaced RLC on your Fuji CP you should take a look at your board supports in the machine. Lack of or improper board support and bad feeders are the most common causes of misplaced RLC's.

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mantis

#19113

Missing component benchmarking | 10 March, 2002

As well as checking board supports you may want to check your nozzles and make sure there not stuck up in the windmill.

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Stephen

#19145

Missing component benchmarking | 14 March, 2002

I worked with Fuji CP6 where one of the techs wanted a minimum of part data's. He was used to working with panasonic machines. We would get resistors broken in two if the part data was too small and parts flying off the board if the part data was too thick. The nozzle would only go down far enough to place a thick part but would drop the thinner one in the air.

Stephen

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alan

#19150

Missing component benchmarking | 14 March, 2002

Missing and misplaced components could be down to board supports set too high or too low. Check the ZO and make sure the deflection is set ok at various points across the board. Check the other usuals such as sticking nozzles, correct size nozzle for part and good feeders with the correct size tape leaf for part.If the problem persists look at the vacuum/air kiss.

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