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US 2020/0164477 A1Published application
Machine tool
AssigneeFanuc Corporation
InventorGaku ISOBE
Life of this patent
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Abstract
Provided is a machine tool including: a main shaft; feed-axis motors that relatively move a table and the main shaft in directions intersecting the longitudinal axis of the main shaft; feed-load measurement units that measure the magnitudes of loads applied to the feed-axis motors; and an anomaly detection unit that detects abnormal loads on the feed-axis motors when the magnitudes of the loads measured by the feed-load measurement units are greater than a predetermined threshold, wherein the predetermined threshold is changed according to the length of a tool that is held by the main shaft.
Claims11
A machine tool comprising:
- a main shaft that holds a tool;
- a feed-axis motor that relatively moves a table to which a workpiece is fixed and the main shaft, in a direction intersecting the longitudinal axis of the main shaft;
- a feed-load measurement unit that measures the magnitude of a load applied to the feed-axis motor;
- an anomaly detection unit that detects an abnormal load on the feed-axis motor when the magnitude of the load measured by the feed-load measurement unit is greater than a predetermined threshold;
- and
- wherein the predetermined threshold is changed according to the length of a tool that is held by the main shaft.
3 more elements
Dependencies are inferred from the claim text.