MAGNETIC BEARING CONTROLLER

摘要

PROBLEM TO BE SOLVED: To provide a magnetic bearing controller for controlling a magnetic bearing spindle unit so that a tool can be automatically replaced irrespective of the type of the tool even in the state without the tool. SOLUTION: The tool can be accurately replaced while the tool is retained supported without contact by deciding timing for performing a tuning operation by using a detection signal for detecting a clamping state or except the clamping state and the state signal of an arm for replacing the tool and automatically changing control characteristics and the characteristics of a natural frequency component attenuating part by measuring the natural frequency, the center of gravity and the weight of a rotor at the tool replacing time. COPYRIGHT: (C)2004,JPO