Numerical controller
AssigneeFanuc Corporation
InventorTakuma Ookura
Life of this patent
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Abstract
A numerical controller, which is configured to correct a machine position error based on a torque difference between a master axis and a slave axis, acquires the torque difference after movement of the master and slave axes that move in response to a movement command, and corrects the machine position error by a correction amount based on a value obtained by excluding a torque difference derived from a mechanical strain from the acquired torque difference. The corrected machine position error is added to the movement command for next time.
Claims2
A numerical controller configured to correct a machine position error based on a torque difference ΔT between a master axis and a slave axis, the numerical controller comprising:
- a movement command unit configured to move the master axis and the slave axis in response to a movement command;
- a torque difference acquisition unit configured to acquire the torque difference ΔT after the movement;
- and
- a machine position error correction unit configured to correct a machine position error by a correction amount based on a value obtained by excluding a torque difference Tm derived from a mechanical strain from the torque difference ΔT,
- wherein the movement command unit adds the correction amount fed back from the machine position error correction unit to the movement command for next time.
Dependencies are inferred from the claim text.