Z axis moving during XY Circle meas

[[Ma...]]

Howdy, I am having this issue when doing a OD circle measurement the z axis is moving in a positive direction during the tangential move causing it to fall off the part. The OD wall is only 3mm tall with a diameter of 86.xxx mm.

Is this issue being caused by my base alignment or is there a way to fix the z axis at a certain height during the measurement.
Attached in the base alignment, and the feature im trying to measure.
Thank!
-Max

feature .JPGalignment.JPG

[[To...]]

Please sign in to view this quote.

Not sure how to solve your issue. Trying un-checking the Default option under the Tangential Probing section.

I noticed your cylinder only has 1 circle path. You would need a minimum of 2. If you don't need to check the perpendicularity of B, then I would consider using a circle instead.

[[Ma...]]

Well this is unfortunate. I do need to measure perp in relation to datum A (flat plane) but with how short thin the measuring surface is I would have assumed 1 pass might have been sufficient enough. Especially if it was slowed down. I have added two passes and will pay attention to the inspection report to see if there is a change in accuracy between the two strategies.

Have you ever had this problem or noticed that the probe tend to wander in the z axis during some measurement ?

Thank you for the input though, much appreciated.

[[To...]]

Please sign in to view this quote.

I assume Datum B is both diameters, not just the top one. If it's both, measure 2 circles, then create a 3D line and recall the 2 circles for your perpendicularity.

[[To...]]

Please sign in to view this quote.

In the perpendicularity, select the P button and enter the length of datum B feature. Without this, the perpendicularity will only evaluate the length of the line, which is from one circle to the other.