Digital Height Gauge Gage R&R - Need Advise and Help Quick

E

eypon

#1
Hello All,

Please help me? I want to use a digital height Gage to measure the parts on a granite surface plate. I am new to GRR and my customer wants to perform a GRR on a reference dimension of a punched hole from the edge of a part let say a panel. Can I measure this with a Calibrated digital height Gage for the gauger study? Example the dimension need to be measure is 6.935 inches from the edge which equals datum A. Tolerance= +/-.005. Or do I need a more discriminative tool.

Thanks

Eypon:
 
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Jim Wynne

Staff member
Admin
#2
Re: Need Advise and Help Quick on Gage R&R

GR&R and tolerance for a reference dimension?

The efficacy of your measurements depends largely on (A) how you locate on the edge of the panel (i.e., the point from which your measurement originates) and (B) how you find the center of the hole. First, +/- .005 for an edge-to-hole center location is probably not reasonable, and then, a height gage is not the best way to measure if the tolerance is that close. An optical comparator or CMM would probably be better, but truth be told, this sort of thing is often done with calipers.
 
Q

quality.shesha

#3
Re: Need Advise and Help Quick on Gage R&R

Hello All,

Please help me? I want to use a digital height Gage to measure the parts on a granite surface plate. I am new to GRR and my customer wants to perform a GRR on a reference dimension of a punched hole from the edge of a part let say a panel. Can I measure this with a Calibrated digital height Gage for the gauger study? Example the dimension need to be measure is 6.935 inches from the edge which equals datum A. Tolerance= +/-.005. Or do I need a more discriminative tool.

Thanks

Eypon:
We can do but you need to have positive answers on the below points:-
1. What is the LC(Least Count) of the instrument? Which plays a major role in conducting a GRR study.
2. Is this a direct measurement or is it a derived dimension?
3. Are you going to use any other tool to measure this dimension other than Digital Height Gauge & the scriber.
4. Do you have a written procedure to conduct a MSA(GRR) study?
5. Are all the operators trained on the usage of the insturment?
6. Is the granite surface plate calibrated?

Give us some more info on this.
 
E

eypon

#4
Re: Need Advise and Help Quick on Gage R&R

We can do but you need to have positive answers on the below points:-
1. What is the LC(Least Count) of the instrument? Which plays a major role in conducting a GRR study.
2. Is this a direct measurement or is it a derived dimension?
3. Are you going to use any other tool to measure this dimension other than Digital Height Gauge & the scriber.
4. Do you have a written procedure to conduct a MSA(GRR) study?
5. Are all the operators trained on the usage of the insturment?
6. Is the granite surface plate calibrated?

Give us some more info on this.
1. LC or resolution = .0005
2. Direct measurement
3. No -I don't currently have a another gage I could use for this measurement.
4. Yes
5 yes
6 Yes
 
Q

quality.shesha

#6
Re: Need Advise and Help Quick on Gage R&R

I think everything is in place and just think of how to locate the part and do the study.
 
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