Quote Originally Posted by m_c View Post
What lower DRO?
From memory, you just enter the measured value into the main X axis DRO.

Homing accuracy depends on how accurate your parts/machine are. On my first lathe, I had an opto slot sensor that I couldn't measure any noticeable change with using a 0.01mm graduation DTI.
Sorry, on one of the videos the guy uses the tooloffset screen. I think he edits the lower DRO to get it to be the same as the measured diameter. In my case I was manually subtracting (or adding) to work out the required difference to make the reading correct. In the tooloffset screen I dont think you can edit the top DRO. Perhaps I'm just doing it in the wrong place.

Ill use a dial gauge on the weekend and test repeatability.