I'm running V2023.1 and I have a customer questioning the min max shown in the report of a unilateral FCF. I can't find anything indicating why a min max would be reporting unless its projecting from the center of the upper limit tolerance zone. I tried to turn it off in the parameter settings, but it still gets reported. Any input is appreciated as I'm still getting used to changes in V2023.1 and I want to ensure I am communicating an accurate explanation to the customer.
Thanks in Advance
It has to do with the way the standard is written and PcDmis adhering stringently to that standard.
You have ± .05 from a zone centered .05 below the surface of the part, that is where the min-max is from.
You are a distance away from the limit (.031 for you from the high limit, which is the surface BASIC as defined sine you are U0).
That is doubled and taken out of the total tolerance (.1 (total tol) - .062 (gap from high doubled)) and you have a measure of .038 actual profile. PcDmis doesn't truncate, so you have some small numbers not displayed, which is why it says .039 instead of .038.
You can't do the math, as defined by the ANSI standards, without having a delta between the worst point and the limit, so they need to shift the nominal down and have a min/max.
It is NOT saying you are +.019 from the as drawn basic, it is saying you are .019 above the nominal created by shifting .05 in from the as drawn basic.
At least they aren't saying you are .029 anymore like in XactMeasure. But it would be easier if that was behind the scenes and not visible so people wouldn't be concerned by a "weird" display in my opinion.
It has to do with the way the standard is written and PcDmis adhering stringently to that standard.
You have ± .05 from a zone centered .05 below the surface of the part, that is where the min-max is from.
You are a distance away from the limit (.031 for you from the high limit, which is the surface BASIC as defined sine you are U0).
That is doubled and taken out of the total tolerance (.1 (total tol) - .062 (gap from high doubled)) and you have a measure of .038 actual profile. PcDmis doesn't truncate, so you have some small numbers not displayed, which is why it says .039 instead of .038.
You can't do the math, as defined by the ANSI standards, without having a delta between the worst point and the limit, so they need to shift the nominal down and have a min/max.
It is NOT saying you are +.019 from the as drawn basic, it is saying you are .019 above the nominal created by shifting .05 in from the as drawn basic.
At least they aren't saying you are .029 anymore like in XactMeasure. But it would be easier if that was behind the scenes and not visible so people wouldn't be concerned by a "weird" display in my opinion.
