i have the problem that I would like to blend two surfaces. One of them is a circle (100mm diameter).
When I BlendSrf them, the circle is automaticly rebuild and the diameter is off by sometimes 0.5mm.
I thougt I could work-around this problem, if I rebuild the circle before I BlendSrf them.

I tried rebuilding a 100mm diameter circle with 16 points and degree 3, resulting in 0.00320616 maximum deviation. But still: when i check the diameter with the diameter command at some areas the circle has a diameter of 100.503mm … how can I minimize this number?

Another example: 50mm circle > rebuild with 18points + deg. 3 (0.000996221 max deviation) > some areas have a diameter of 50.262mm or 49.722mm…

Hi Niklas the radius will vary more, locally, than the deviation from the true circle due to slight variations in curvature along the edge. The deviation from the true circle is ~.0001 or less and the overall size of the edge curve is
50.00000 by 50.00000 millimeters