Advenced measuring principle

[[El...]]

Hi everyone,

Im trying to compare a surface profile (GDnT) but I have a few problems. I have to do the comparaison on the whole surface of the part (not only on one element like a plan or something else), so after the alignement, I created my reference surface on the CAD but I can't assign any measuring principle : I can't even select the mesh and 'fitting element' does not work correctly.

You can see my CAD in the first pic, then my 3d scan and my nominal surface.

[[Ma...]]

Due to "green" color of a surface i presume you are doing it on wrong face - in other words - on your actuals there is no surface ( it should be grey ) - green means surface viewed from inside of a material.

If your scan is correct, then you have to select correct surface on model ( that side which is not viewable now )

Or your scan is not correct - missing thickness of material on actuals ( you have only a film and not thick material ) or your scan is from other machine, then you have to invert nominals.

[[El...]]

Thank you for your response !

I'm working on composite part, so my comparison are between a CAD and a 3D scan of the mold (there is no thickness). I can compare a plan if I want to do GD&T control like surface profile, but I can't do it on the entire surface if there is no thickness on my mesh ?

[[Ma...]]

I am not sure how Inspect is handeling situation, where you have whole model, but scan is only from a one side.

You can visually compare without profile by clicking on "Compare surface on actuals"

With profile and surface element i dont know

[[No...]]

Surface profile should also work on a partial scan. But the surfaces you compare must have the same surface normal direction. So if you compare a CAD of the part with the correspondig surface of the mold, you will usually have flipped surface normals. I'm not sure if there is a switch somewhere to compensate for this. Since Inspect is capable to work with assemblies, I would assume there is one. If not, you'll possibly need to flip the normals of the scan.