Having a question with a program. My part has a profile callout of .040. The report shows +.020 -.020... And my results say .022, and is RED... I'm not seeing how a profile of .040 is out of tolerance when the result is .022?? Something just doesn't seem right....?
ASME14.5 profile is as follows:
Condition 1: If all point are positive error the reported value is: Nominal "0" to your worst positive error. Example(profile of .04 AKA +.02-+.02) no negative error... worst positive error of 0.022 will result in a failing profile of .022
Condition 2: If all point are negative error the reported value is: Nominal "0" to your worst negative error. Example(profile of .04 AKA +.02-+.02) no positive error... worst negative error of 0.022 will result in a failing profile of .022
Condition 3: Error is both positive and negative: reports the difference between the largest negative and highest positive. Example(profile of .04 AKA +.02-+.02) 0.002 worst negative error... worst positive error of 0.019 will result in a passing profile of .021
Thats where it gets tough to explain to an engineer!
But, in theory, if the surface checks negative .022... the profile WOULD be .044? (examples of your Condition 1 & 2)
And positive .019, negative .002, would be a profile of .038 (example of your Condition 3) ??
Even if the nominal was 1.000...and it checked 1.022, thats oversize with a profile of .044.?
So I would have to show the engineer the actually CMM hits?
Thats where it gets tough to explain to an engineer!
But, in theory, if the surface checks negative .022... the profile WOULD be .044? (examples of your Condition 1 & 2)
And positive .019, negative .002, would be a profile of .038 (example of your Condition 3) ??
Even if the nominal was 1.000...and it checked 1.022, thats oversize with a profile of .044.?
So I would have to show the engineer the actually CMM hits?
