How to find a hole center on a turning cener machine with C axis

[Jaani]

The image is just an example. Suppose the part is turned on both of the sides, on the second side, it is necessary to find the hole center exaclty to make the C offset coordinate = 0.

I know that on a VMC machine, edge finder is used to find a hole center. But what about a lathe with C axis? Hole D can be small or large.

 

[Spruewell]

can't see the picture

 

[Jaani]

Strange. I uploaded it here too:

Snag-3541e07 hosted at ImgBB

Image Snag-3541e07 hosted in ImgBB

ibb.co

 

[lobust]

It's effectively the same thing as on a mill except that you dial it in in XC instead of XY.

You can sweep it with an indicator, touch four sides with a Haimer, probe it - anything you can do in a VMC also works in a C axis lathe...

 

[Jashley73]

I'm assuming that you have a live-tool mounted in the turret. If that's the case, test-indicator.

If that's not the case, (if it has a C-axis, I assume that it has live tools, but if not, whatever...) perhaps a dowel-pin in the hole, and the "probe" a tool-pocket in the turret? Take note of your C-axis positions, then find the middle/average.