Base alignment help

[[Ry...]]

Hello all, I am running into a issue with my base alignment not going to all of my features. I have a large round part with an outer diameter of approx. 72 inches. I have this set up as my XY zero in my base alignment, as I need to check the coaxially of a center shaft. When I scan the outer diameter the actuals for x and y come in at zero. But when I move the probe to roughly were zero should be on the part it shows the x value as negative 20" and the Y as 2. I have set base alignment to zero selected and have re run the manual several times. It almost seems like the base alignment isn't translating in the mcs correctly. 

I'm at a loss of what this could be. I am running calypso 7.8.06

Thank you for the help

[[Ma...]]

In CAD menu you can enable showing probe tip so you can see if it moves like it should and orientation.

Without any more specific data i can not help more.

[[Ry...]]

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attached is a photo of the probe shown in the cad the probe is physically located over the center of the part but shows it way off in X

[[DW...]]

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 Can you post a screenshot of your base alignment setup window?

[[Ca...]]

I saw you mention coaxially, which makes me wonder if a cylinder is involved. Are you using a cylinder for your XY0? If so, I would recommend switching that to a circle for the base alignment to see if that better controls your XY0.

[[Ry...]]

Here is a screen shot of my Base alignment Dat FL is the large circle

 

[[Ry...]]

[[DW...]]

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 Do not use a circle to try to control rotation. It does not and can not control rotation. A 3d line recalled from two circles and projected to a plane? Sure. But not a single circle. I don't know what your part looks like exactly, is it a symmetrically round part? No actual clocking features? Either way, get rid of the circle for planar rotation, and then do "Execute manual run now." Let me know if this corrects the behavior. 

[[Za...]]

DWC makes a good point about circles being used in planar rotation, but if you feel you must use a circle as your planar rotation, it helps to define the planar rotation first. any point reducible feature used as planar rotation will have the direction defined from the origin to the chosen point-reducible feature

Edited 3 hours ago