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Dear cove members,
Sorry for my baby english and i kindly request your valuable comments for
My company has a discussion with supplier regarding a gage issue.
this supplier provides us bushings. Tolerance is 0,009 µm. As a customer, we request from them to control this feature with a inner diameter micrometers has a resolution 0,001 µm.
To be honest this gage does not comply with 1/10 rule.
Supplier offers to use go/no gage and has studied a Gage R&R study to proof us inside diameter micrometer is not capable to measure this feature. Please find attached screen shots for R&R study results.
There is template spreadsheet that we received from supplier and with same measurements our minitab analysis.
Is there anything wrong with supplier measurements. don't randomized parts or same readings for same parts from all operators like etc.
Reproducebility is ok but repeatability is not ok. What does it means.
Operator's skill, training are ok to use tihs gage or measure this part ?
Or they saw previous operator measurement result.
repeatability is not ok means that there is a big variation within choosed samples or process does not under control.
NDC result is 0. Is micrometer not capable to measure 0,009 tolerance ?
If a not good result added to this results NDC becomes greater then 5.
Please advice
Best Regards,
Sorry for my baby english and i kindly request your valuable comments for
My company has a discussion with supplier regarding a gage issue.
this supplier provides us bushings. Tolerance is 0,009 µm. As a customer, we request from them to control this feature with a inner diameter micrometers has a resolution 0,001 µm.
To be honest this gage does not comply with 1/10 rule.
Supplier offers to use go/no gage and has studied a Gage R&R study to proof us inside diameter micrometer is not capable to measure this feature. Please find attached screen shots for R&R study results.
There is template spreadsheet that we received from supplier and with same measurements our minitab analysis.
Is there anything wrong with supplier measurements. don't randomized parts or same readings for same parts from all operators like etc.
Reproducebility is ok but repeatability is not ok. What does it means.
Operator's skill, training are ok to use tihs gage or measure this part ?
Or they saw previous operator measurement result.
repeatability is not ok means that there is a big variation within choosed samples or process does not under control.
NDC result is 0. Is micrometer not capable to measure 0,009 tolerance ?
If a not good result added to this results NDC becomes greater then 5.
Please advice
Best Regards,