Patent ID: 11892820
Assignee: OKUMA CORPORATION
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The error compensation method for the machine tool according to claim 1, wherein
in the approximating, when the compensation parameter of the positioning error is calculated,
a part of a relation between the error values and the measurement values is approximated by a straight line under a first calibration-master condition in a combination of the two calibration-master conditions among the plurality of calibration-master conditions, the first calibration-master condition has the installation position on a negative side,
a part of the relation between the error values and the measurement values is approximated by a straight line under a second calibration-master condition that has the installation position on a positive side, and
the error value is offset such that the approximate straight line of the first calibration-master condition and the approximate straight line of the second calibration-master condition have an intersection point at an intermediate point between the measurement value at a positive end in the installation direction of the first calibration-master condition and the measurement value at a negative end of the second calibration-master condition.