mkk177 Since you're running PC-DMIS 2023.1, you could use the Geometric Tolerance command to do profile of a surface with an unequal tolerance zone. You would need to reference the plane as the primary datum as well as the considered feature. If you're working to ASME Y14.5, you would need to apply a total tolerance of 0.0004 with a U value of zero (no positive tolerance). If you're working to ISO 1101, you would apply a total tolerance of 0.0004 with a UZ of negative 0.0002. Regardless of the standard selected, your deviations and graphics will come from the centre of the tolerance zone (so 0.0002 below the surface of the plane).
I have to agree with
Caemgen on the resolution though. Assuming that 0.0004 value is in inches, that's only 0.01mm (10µm). Unless you have a very accurate machine with a first term uncertainty of 1µ or less (like a Leitz PMM for example), you will struggle to get reliable results.
mkk177 Since you're running PC-DMIS 2023.1, you could use the Geometric Tolerance command to do profile of a surface with an unequal tolerance zone. You would need to reference the plane as the primary datum as well as the considered feature. If you're working to ASME Y14.5, you would need to apply a total tolerance of 0.0004 with a U value of zero (no positive tolerance). If you're working to ISO 1101, you would apply a total tolerance of 0.0004 with a UZ of negative 0.0002. Regardless of the standard selected, your deviations and graphics will come from the centre of the tolerance zone (so 0.0002 below the surface of the plane).
I have to agree with
Caemgen on the resolution though. Assuming that 0.0004 value is in inches, that's only 0.01mm (10µm). Unless you have a very accurate machine with a first term uncertainty of 1µ or less (like a Leitz PMM for example), you will struggle to get reliable results.
Using this technique kind of gives me a result that shows the NG issue. I get 0.0003 positive and -0.0001respectively. however, it has a total of 0.0005. Flatness is at 0.0001. I even changed the total tolerance to 0.0005 only to get a reading of 0.0006. I will check several parts and find out how well it works
