Fanuc Corporation

Haruhisa Yago

Naoto Sonoda

Tomohiko Kawai

A machine tool controller includes: a servo control unit that generates a positional error based on a difference between a position command for moving a tool and a present position of the tool and generates a drive command for a motor that moves the tool based on the positional error; and a displacement meter that measures a machining surface displacement amount of the workpiece. The servo control unit includes: a compensation amount calculating unit that calculates a shape error of the workpiece with respect to a desired shape for each rotation angle of the workpiece based on the measured machining surface displacement amount and obtains a compensation amount of the positional error based on the calculated shape error of the workpiece; and a first compensation unit that compensates the positional error for each rotation angle of the workpiece based on the calculated compensation amount.

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Yamanashi, Japan

Haruhisa Yago