Degree Finder or DRO Question

[EdK]

When I had my round column mill, I was thinking of attaching an absolute encoder to it so I could return the head back to where it was with a reasonable degree of accuracy. The thought was to have some sort of collar with hash marks and numbers on it with a pointer to get the head roughly back to where it was and then fine tune its location using the absolute encoder. It never came to fruition though.

Ed