[HELP] Centering on a rotary table

[Highpower]

(01-29-2015, 01:55 PM)Dan Boy Wrote: I had thought I could use a DTI on the center of the part but positioning the part accurately will be difficult.



Cheers, Dan.

Sweep the ID of the part with your DTI and adjust the x-y position of the table until you get an equal reading all the way round the part.
https://archive.org/details/VerticalMill...terofaHole

Or use an edge finder to locate two opposite points and split the difference on both planes (x & y). You'll have to use the machine dials to measure across the opposing edges - with some special attention.



 

Or, just use Dave's suggestion and be done with it. 

Another option would be to use a co-axial indicator in the machine spindle and just dial the table into zero with the handles. Bottom line is to use whatever method that is available to you, as long as it works for you.