Three types of centering, high-speed centering, clamp-only centering, and measurement centering, or a combination of the three, are possible.

A unique centering machine with an automatic measuring device corrects lens centering with a stopped grinding stone.
Comparative measurement is possible with an electric micrometer, even with opaque lenses and before polishing.
A roller guide is used for the clamp shaft, resulting in high rigidity and high precision.
A servo motor is used for the clamping shaft to shorten the clamping and releasing time.