MSA (Measurement Systems Analysis) Positional Tolerances

B

bernchan

#1
Hi,

I'm stuck, can't figure out how do to this..

I have a machine that measure a component and then as a result gives what shim is needed to obtain the wanted result.
The components can vary from 600 to 900 micrometers. But as long as the correct shim is chosen by the system that does not matter.
Say that the tolerance would be +-1 shim(+-12 micrometers), how would I conduct an MSA on the gauge?

I did a "normal" Gauge R&R which gave a result of 30% study variation, that does not really mean much though..how can I set the tolerance? If I set the tolerance to 24 micrometers the part to part variation would be about 1000% which is to little use..

Would appriciate your help!

/Mike
 
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Marc

Hunkered Down for the Duration with a Mask on...
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#2
Re: MSA Positional Tolerances

Anyone with any thoughts / information on this question?
 

Miner

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Staff member
Admin
#3
Re: MSA Positional Tolerances

To do the study "right", you should break it into two sections.

First, perform a variable MSA on the actual measured values obtained by the machine, not on the shim selected.

Second, validate the software by performing an attribute MSA on the machine's selection of a shim based on that measured value. That is based on the measured result, did it select the correct shim.
 
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