How can I create a reference circle from the intersection of a nominal cylinder and a toroidal surface in ZEISS INSPECT?

[[ko...]]

Hello everyone. I am new to ZEISS INSPECT and I am not an expert, so I would appreciate your guidance with the following measurement problem.

I need to measure two distances (marked in Yellow) from a Ø16.4 theoretical exact dimension (TED) circle, shown in green in the attached images. The adjacent blue profile is not conical; it is a toroidal surface. However, I cannot find an option in ZEISS INSPECT to construct or fit a torus, and the available construction appears to allow only a cone.

My preferred strategy is to create a nominal cylinder with a diameter of 16.4 mm and then construct a circle from the intersection between this cylinder and the measured toroidal feature.

As an alternative, I considered creating a section through the feature and using the intersection of that section with the Ø16.4 cylinder. Unfortunately, I have not been able to identify the appropriate ZEISS INSPECT functions for either method.

As a temporary workaround, I created the circle on a fitted cone. This produces a result, but it is not geometrically correct because the actual feature is a torus. The cone fit may therefore shift the reference circle and affect the two distance results.

Could you please advise on the correct workflow to:

1.      calculate its intersection with the measured toroidal surface, or with a section derived from that surface;

2.      construct a circle from the resulting intersection; and

3.      use that circle as the reference for the two distance measurements?

Edited 7 hours ago
Pictures Layout Improvement

[[Ma...]]

Well, this is not an easy job for beginner 🙂

I would suggest making a cylindrical section ( in Section menu ) - you will select axis and radius.
Select area on mesh and it will make an section. Now select that section and make a circle from it ( fitting principle )

Now you need to obtain somehow other side of those dimensions.

You can either use touch caliper or make there a fitting circle and intersection it with theoretical plane to obtain quadrant.

Now you can measure as  2point distance.