Curve Distance

[[Ke...]]

Looking for some insight.

I'm trying to measure min & max material thickness, between two concentric curves (for the first time)
I'm using the Direct Distance (3d) evaluation.
I'm getting a Min of 2.24; a Max of 3.44; and an Avg of 2.31
Based on some down & dirty micrometer checks, I'm not expecting a thickness that is over 2.3mm.

If I check using Max Inscribed vs Max Circumscribed and vice versa, I get Min of 2.26 and a max of 2.28, which seems a little more realistic, but I'm looking for more of a direct measurement, than a calculated one that doesn't take the offset locations into consideration.

The nominal diameters are 50.63 OD; and 46mm, that are off position by .0.232 (2d polar)

**Update**
If I make the make the Curve from the OD the "Inner Curve", and the Curve from the ID the "Outer Curve", then the numbers make sense,,,, why??

[[Da...]]

Probably not practical for the actual inspection, but could you construct lines from the center of the circles to a specific outer curve point then ask for the intersect with the inner curve and check the length??? A few places along the feature would at least see if you're in the ball park...