Rotary Table Alignment off of Non-Symmetrical Part

[[Ch...]]

I need opinions on how to align non symmetrical parts to create a rotary table axis. Specially, I am trying to do this on a turbo charger. The part I am using to set my axis is non-symmetrical, doesn't have a lot of flat machined surfaces, and everything is at some compound angle.

[[Cl...]]

We have a part that we run on the O-inspect. It's a cylinder with too much runout for a conventional alignment. So I load the part, and probe a cylinder at zero deg, rotate the RT 180 deg, and probe another cylinder. Then I create a symmetry from the two cylinders and align my RT using the symmetry. Then I create the base alignment on the part.This method may work for you, if you can find the right feature to use?

[[Ch...]]

That is what I do for the majority of my parts but they have at least some sort of shaft on center. This one does not. I think i'm going to have to probe a feature and do some kind of rotational pattern to get it. For example, probe something that will have an axis, then repeat probing the features at different RT angles. I don't have time to try it today but I need to find when I can play around with this.


As a bonus, I just found a old reference sphere with a threaded shaft that will bolt onto my part. Looks like I might be able to use the good old fashioned sphere method.