Manual key in surface finish

[CTD2003]

so we have to check surface finish on all our product. we typically put this on the report using the manual key-in dimension. the issue im having is when i set the nominal to 0 and the plus tolerance to 250Ra the color scale still shows red even though its passing. what can i do so this does not turn red? I tried putting 125 nominal with a +/-125 but this messes with our SPC data. any help is much appreciated



surface finish.jpg

[DAN_M]

so we have to check surface finish on all our product. we typically put this on the report using the manual key-in dimension. the issue im having is when i set the nominal to 0 and the plus tolerance to 250Ra the color scale still shows red even though its passing. what can i do so this does not turn red? I tried putting 125 nominal with a +/-125 but this messes with our SPC data. any help is much appreciated



surface finish.jpg

that is an odd glitch that you're seeing on the PC DMIS inspection report.

does the feature show up "bad" whent he data makes its way to your spc software? the measured value itself is well within tolerance and PC DMIS says the OUTTOL is "0"

[CTD2003]

no the data shows good but if i change my nominal in the SPC software then is skews our CPK's

[bfire85]

so we have to check surface finish on all our product. we typically put this on the report using the manual key-in dimension. the issue im having is when i set the nominal to 0 and the plus tolerance to 250Ra the color scale still shows red even though its passing. what can i do so this does not turn red? I tried putting 125 nominal with a +/-125 but this messes with our SPC data. any help is much appreciated



surface finish.jpg

Just tested this out on 2021.1 and I am getting the same thing.

214.7483 seems to be the limit allowed for a + tolerance.

[bfire85]

Just tested this out on 2021.1 and I am getting the same thing.

214.7483 seems to be the limit allowed for a + tolerance.

Something to check out Don Ruggieri neil.challinor

[Schrocknroll]

I don't know how hard it would be to get used to, but you could use .250 as your tolerance and have a comment telling the operator to input the Ra reading in thousands, .020 in your example.

[CTD2003]

I don't know how hard it would be to get used to, but you could use .250 as your tolerance and have a comment telling the operator to input the Ra reading in thousands, .020 in your example.

im sure that would get messed up by someone and we would have to rerun parts on the CMM. thanks for the idea though, i probably wouldn't have thought of that.

[Cris_C]

LOL, I thought I had a workaround for you. I tried to turn off the reporting of the Key-in dimension, put the measured value into a generic feature, and then report the feature with a location dimension:

DIM DIM1A= KEYED IN DIMENSION OUTPUT=NONE
AX NOMINAL +TOL -TOL MEAS MAX MIN DEV OUTTOL
M 0.0000 250.0000 0.0000 20.0000 0.0000 0.0000 20.0000 0.0000 >

ROUGHNESS =GENERIC/CIRCLE,DEPENDENT,CARTESIAN,OUT,$
NOM/XYZ,<-13.5,0,0>,$
MEAS/XYZ,<-13.5,0,0>,$
NOM/IJK,<0,0,1>,$
MEAS/IJK,<0,0,1>,$
RADIUS/0,DIM1A.MEAS

DIM DIM1= LOCATION OF CIRCLE ROUGHNESS UNITS=IN ,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH HALF ANGLE=NO
AX NOMINAL +TOL -TOL MEAS MAX MIN DEV OUTTOL
R 0.0000 250.0000 0.0000 20.0000 0.0000 0.0000 20.0000 0.0000 >
END OF DIMENSION DIM1

But, that was a fail. This looks even worse:

roughness fail.png

[JesseB413]

I tried the same exact thing lol. Even tried putting the nominal at 250 with all negative tolerance. No luck!

[Cris_C]

Just tested this out on 2021.1 and I am getting the same thing.

214.7483 seems to be the limit allowed for a + tolerance.

I was curious where that number came from. Looks like that has something to do with the limit of a 32bit floating point variable.

32-bit floating point limit.png

[Henniger123]

wasn't version 2021.1 in 64 bit? ^^

[Cris_C]

This isn't the most elegant solution, but you can right click on that dimension in the report window, select Edit Object, and un-select the 'Graphic' column. Then it will just omit the graph for that feature.

roughness remove graph.png

However, you would have to remember to do that for every program. A bit of a pain. If you use a custom report template there may be some edits that can be made to actually fix the issue.