Align Cylinder

[[T...]]

Need help doing an alignment to cylinders. Imported cad and scan data. Made a pre alignment. Created nominal cylinders and assigned fitting elements. Created plane off of a known flat surface of cad, assigned fitting element. Created intersection points to center of cylinders, and assigned measuring principles referenced construction. Made some surface points on the flat surface, intersected with mesh, and assigned deviation normal checks. Went to Rps alignment and added the 2 center points as the x and y, and 3 surface points as the z, hit ok, software asks to create iterations? Surface comparison is close but still not exact?

[[Be...]]

Hi,

usually you would align a cylinder and a plane with a 'Geometric alignment'. The first datum is usually the cylinder and as second datum you are using the plane.

Now you need a third datum to stop the rotation. If you have a feature like a point which stops the rotation then this would be sufficient but this depends on your data. Sometimes you have to create an additional 'Local Bestfit' alignment beneath the 'Geometric alignment' where you increase the accuracy of your rotation.

For further help you need to contact your local ZEISS partner.

Regards,

Bernd

[[Jo...]]

Hi, 

How I can align a part hypostatic? 

I want align a part with a Cylinder (DATUM A) and a plane (DATUM B). The part is a revolution part, I don't need to constrain 6 degrees of freedom, only need 5, and 1 rotation will be free.

When I try the geometric alignment I can't use only 2 elements (cylinder and plane)

[[Be...]]

Unfortunately in this case you have to create a further helping point (on the cylinder surface) with a simple measuring principle linke 'Intersect with mesh' which stops a hypothetical rotation (which is in your case really arbitrary).

And yes, we have already recorded this wish to disable this last degree of freedom if you really have a complete rotational symmetric part (which is quite seldom  from our experience). 

Regards