What do I need to perform a GR&R on a feedback autogage?

T

threespeedgearbox

#1
Hi,

What do I need to perform a GR&R on an a feedback autogage. This Autogage measures a bearing journal, then feedbacks the size to the machine so it can make the respective offsets. The part is loaded by a robot in a fixture and the gauge doesn't perform SPC.

Thank you very much for your help.

Regards
 
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D

David DeLong

#3
According the TS standard, R & R studies are to be conducted on all gauges reflected in the Control Plan. This gauge is a production measuring instrument and does not need an R & R study.

If one still would like to perform one anyway, then I would perform a normal sample size of 10 pieces that are usually measured, numbering them from 1 - 10 and place them in the auto measuring machine and record the results. Do this 3 times for your data.

There should not be a reproducibility value since everything is in automatic mode but one COULD have someone else do this also just so that we do have 2 people.

Now we have 2 Operators and 3 reps.
 
P

Phil Fields

#4
It sounds like you need to validte the process. Load the system with parts with known dimensions (large/small). Remeasure the parts after processing, does the system give you the expected output (parts in tolerance)?
 
T

threespeedgearbox

#5
Yes, My parts are in spec the GR&R is to submit with the PPAP. The capability of the process ig good too taking the data from those gages.

My question is if I perform an Anova GR&R assuming just 1 operator and 10 pcs, is that GR&R a valid one? Operator don't influence at all my measurements. since there are no operators in the process.

Thanks,
 
B

Bigfoot

#6
Yes, My parts are in spec the GR&R is to submit with the PPAP. The capability of the process ig good too taking the data from those gages.

My question is if I perform an Anova GR&R assuming just 1 operator and 10 pcs, is that GR&R a valid one? Operator don't influence at all my measurements. since there are no operators in the process.

Thanks,
That 1 operator 10 piece GR&R using the ANOVA question should be posed to your customer. I would start with an explanation of the gage, invite them to come and see it & how it functions, (possibly a video if they cannot come), along with the results of process capability studies. They should determine wheteher it is acceptable or not. :2cents:
 

Miner

Forum Moderator
Staff member
Admin
#7
One option would be to perform a stability study and use the range to calculate repeatability.
 
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