Gage R&R Results - ?Number of Distinct Categories = 1?

C

CMfgT

#11
Re: Gage R&R Results - “Number of Distinct Categories = 1”

A lot better indeed :D

Your total Gauge R&R %Tol is 46.79, the % Study variation is 28%.

QUOTE]


Can you clarify what you mean by "Your total Gauge R&R %Tol is 46.79, the % Study variation is 28%." What is the difference? I know my gage rr value must be below 30%. If a customer called and asked for my gage r and r value, what value are they looking for? what is the difference.

thanks,
 
Last edited by a moderator:
Elsmar Forum Sponsor

Jim Wynne

Staff member
Admin
#12
Re: Gage R&R Results - “Number of Distinct Categories = 1”

I'm confused. You're referring to UCL and LCL, (upper and lower control limits) but I think you mean USL and LSL (upper and lower specification limits). If this is the case, what do you mean by "a tolerance of .001"? The fact that you identify the "LCL" as 1.179 (.002 less than 1.181) indicates that the total tolerance is something other than .001. Can you clarify?
I attached the new data with info. Alot better. First off I am sorry, I had a typo, so my part number results were mixed up.

Clarify, I ment to say my +/- tolerance is .001, so I have .002 overall.

Now, is my total gage R&R 28%?
That still doesn't explain where 1.179 came from, if the nominal is 1.181 and the tolerance is ± .001.
 
C

CMfgT

#13
Re: Gage R&R Results - “Number of Distinct Categories = 1”

That still doesn't explain where 1.179 came from, if the nominal is 1.181 and the tolerance is ± .001.
USL is 1.181
NOMINAL=1.180
LSL is 1.179
 
Last edited by a moderator:
C

CMfgT

#16
Re: Gage R&R Results - “Number of Distinct Categories = 1”

A lot better indeed :D

Your total Gauge R&R %Tol is 46.79, the % Study variation is 28%.

Can you clarify what you mean by "Your total Gauge R&R %Tol is 46.79, the % Study variation is 28%." What is the difference? I know my gage rr value must be below 30%. If a customer called and asked for my gage r and r value, what value are they looking for? what is the difference.

thanks,
 

bobdoering

Stop X-bar/R Madness!!
Trusted Information Resource
#17
Re: Gage R&R Results - “Number of Distinct Categories = 1”

I did not see where you answered this very important question:

2) Are you measuring the exact same spot on the part each and every time?


If not, you can be masking your gage error with within-part variation - which has no bearing on the study and makes the gage look worse than it is.
 
C

CMfgT

#18
Re: Gage R&R Results - “Number of Distinct Categories = 1”

I did not see where you answered this very important question:

2) Are you measuring the exact same spot on the part each and every time?


If not, you can be masking your gage error with within-part variation - which has no bearing on the study and makes the gage look worse than it is.
Yes, I put a dime size circle on each part with a sharpie and the operators put one side of the mic inside of the circle when they measured the parts for the study.
 

bobdoering

Stop X-bar/R Madness!!
Trusted Information Resource
#19
Re: Gage R&R Results - “Number of Distinct Categories = 1”

Yes, I put a dime size circle on each part with a sharpie and the operators put one side of the mic inside of the circle when they measured the parts for the study.
Good! That eliminates one issue. One issue that remains is gage pressure - a notorious cause of variation with micrometers (thanks to its utilization of the screw concept.) You could verify that as a possible cause by seeing if a .0001 indicator does better. It is not affects as much by gage pressure, thanks to it control by the internal spring.
 
C

CMfgT

#20
Re: Gage R&R Results - “Number of Distinct Categories = 1”

Good! That eliminates one issue. One issue that remains is gage pressure - a notorious cause of variation with micrometers (thanks to its utilization of the screw concept.) You could verify that as a possible cause by seeing if a .0001 indicator does better. It is not affects as much by gage pressure, thanks to it control by the internal spring.
Yes, as stated above, I used a friction mic which minimizes this error. I believe this error is a main cause when setting or zeroing the mic. We ordered a snap gage, so hopefully another gage r r will yeild better results and will justify spending the money on snap gages.
 
Thread starter Similar threads Forum Replies Date
C Gage R&R study definition - Results for GRR is .0005 - What does this number tell me? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 5
B How to interpret Grindometer Gage R&R Results Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 1
P Strange Gage R&R results for a Caliper (Tolerance Method) Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 6
Y Poor Gage R&R Results - High R&R result and poor ndc value Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 5
C Gage R&R Minitab 'crossed' confusing results Using Minitab Software 3
C Conclusions from weird GR&R (Gage R&R) Results - 9 of 12 points have NDC of 1 Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 3
T What does the Gage R&R results tell about my Accept/Reject Decisions? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 5
T Gage Bias and Linearity - How to interpret the Minitab results Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 6
C Interpreting Gage R&R Results - 3 operators, 3 iterations and 10 parts Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 6
F Gage R&R - How to interpret results? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 5
S Gage R&R (GRR) Study - Please comment on the results Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 7
B Gage R&R Spreadsheet Results - Confused as to what the results mean Inspection, Prints (Drawings), Testing, Sampling and Related Topics 28
S Using the results from GR&R (Gage R&R) Analysis - One sided dimension Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 25
C Functional Gages give different results - Thread Plug Gage Inspection, Prints (Drawings), Testing, Sampling and Related Topics 14
G Help in understanding my Gage R&R results on a pH meter Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 4
S Could someone tell me what are the results of a Gage R&R & how to interpret it? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 7
C 1st Gage R&R Results help Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 48
M Poor Gage R&R results (30%RR to 80%RR) - What Next? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 6
C Interpreting Minitab Gage R&R study results - Relative Crease Strength (RCS) Using Minitab Software 3
P Can the GR&R (Gage R&R) results for one P/N be used for mulitple P/Ns? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 12
K Gage R & R - How to enter appraiser results into an Excel .xls spread sheet Excel .xls Spreadsheet Templates and Tools 12
J Gage Block Calibration Results and Taking Uncertainty into Account General Measurement Device and Calibration Topics 3
Howard Atkins Values and results to check Validation of Gauge (Gage) R&R program Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 14
K Gage R&R - How do I interpret the %PV & %TV results? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 9
S What are Acceptable Limits for Gage R&R Results Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 6
Geoff Cotton Minitab GR&R (Gage R&R) - Minitab is giving different results for distinct categories Using Minitab Software 4
J Gage R&R - Consistent Readings, Inconsistent Results? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 8
J Acceptable Gage R&R Output Results - EV, AV, R&R, PV, and TV Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 5
T Plug Gage Calibration Calibration and Metrology Software and Hardware 1
L Gage R&R TMV Acceptance Criteria Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 4
S MSA for attribute relation gage Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 2
E Zero part to part variation - Gage R&R project Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 15
M Gage R&R and right way to measure Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 16
L Gage RandR on automated equipment. IATF 16949 - Automotive Quality Systems Standard 7
B Gage calibration frequency, ISO and IATF - What are the requirements Calibration Frequency (Interval) 3
D Difference between Test Method Validation and Gage R&R Qualification and Validation (including 21 CFR Part 11) 18
R Determining Uncertainty from Gage R&R Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 1
C Correct Calibration Method for Dial Depth Gage General Measurement Device and Calibration Topics 6
C Gage Block Wringing General Measurement Device and Calibration Topics 3
B Gage R&R with NDC=1 Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 19
S Type 1 Gage R&R or something else? Reliability Analysis - Predictions, Testing and Standards 6
G Should I perform Gage R&R only at the beginning of a new project? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 6
V Thread Plug Gage Pitch GO Diameter out of spec AQL - Acceptable Quality Level 8
G Gage R&R - Where am I going wrong? Part of a FAIR submission (Aerospace) Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 2
R Gage R&R Excel templates Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 3
K Gage R&R with more than 3 appraisers Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 2
Anerol C Gage R&R Template AIAG 4th Edition IATF 16949 - Automotive Quality Systems Standard 3
T Attributes SPC study - Attributive control (Go gage) Statistical Analysis Tools, Techniques and SPC 5
S Capability or Gage R&R Study for Leak Tester? Reliability Analysis - Predictions, Testing and Standards 15
N % Tolerance - Type 1 study on the gages, then a gage R&R (ANOVA) Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 4

Similar threads

Top Bottom