How to measure flatness deviation without CAD in ZEISS INSPECT?

[[Su...]]

Hi everyone,

I'm working with ZEISS INSPECT and currently only have scan data (STL mesh) — no CAD model is available.

I would like to measure the flatness deviation of a planar surface, and ideally obtain the maximum and minimum deviation values from a defined reference plane.

Is there a way to:
1. Create a reference plane directly from the mesh?
2. Compare a selected surface region to that reference plane?
3. Generate deviation values (min/max/avg) or a color map without needing a CAD?

Any help, screenshots, or workflow steps would be greatly appreciated!

Thanks in advance.

[[Na...]]

Hi,

you can construct elements directly on a mesh. For GD&T you can use the quick creation tool. Selections are done automatically by the software when using fitting elements and you can of course select manually (https://techguide.zeiss.com/en/zeiss-inspect-2025/article/general_selections_in_3D_view.html).