Machine tool and origin point correction method
AssigneeFanuc Corporation
InventorsYuuzou Inaguchi, Gaku Isobe, Yasuaki Koyama
Life of this patent
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Abstract
A machine tool includes a turning position adjustment unit configured to control a turning drive unit so that, when a tool is transferred between a spindle and a grip, if an amount of sway of the tool is greater than or equal to a threshold value, a turret is turned and the amount of sway of the tool becomes less than the threshold value, and an origin point correcting unit configured to correct an origin point in accordance with a turning position of the turret acquired by a turning position acquisition unit, when the turret is turned by the turning drive unit so that the amount of sway of the tool becomes less than the threshold value.
Claims14
A machine tool including a tool changer configured to change a tool mounted on a spindle by way of a turret provided with a plurality of grips for retaining the tool, comprising:
- a turning drive unit configured to turn the turret;
- a turning position acquisition unit configured to acquire a turning position of the turret with respect to an origin point;
- a sway amount acquisition unit configured to acquire an amount of sway of the tool when the tool is transferred between the grip and the spindle;
- a turning position adjustment unit configured to control the turning drive unit so that, when the tool is transferred, if the amount of sway of the tool is greater than or equal to a threshold value, the turret is turned and the amount of sway of the tool becomes less than the threshold value;
- and
- an origin point correcting unit configured to correct the origin point in accordance with a turning position of the turret acquired by the turning position acquisition unit, when the turret is turned by the turning drive unit so that the amount of sway of the tool becomes less than the threshold value.
An origin point correcting method for correcting an origin point that serves as a reference for a turning position of a turret, in a machine tool including a tool changer configured to turn, by a turning drive unit, the turret provided with a plurality of grips for retaining a tool to a turning position corresponding to a grip that retains a desired tool, and to carry out change of the tool which is mounted on a spindle, the method comprising:
- a sway amount acquisition step of acquiring an amount of sway of the tool when the tool is transferred between the grip and the spindle;
- a turning position adjustment step of controlling the turning drive unit so that, if the amount of sway of the tool acquired in the sway amount acquisition step is greater than or equal to a threshold value, the turret is turned and the amount of sway of the tool becomes less than the threshold value;
- and
- an origin point correcting step of correcting an origin point in accordance with a turning position of the turret acquired in the turning position adjustment step, when the turret is turned by the turning drive unit so that the amount of sway of the tool becomes less than the threshold value.
Dependencies are inferred from the claim text.