Machine Tool and Control Method for Machine Tool

Abstract

Provided is a technique for detecting at least wear of a tool. A machine tool includes a spindle that causes the tool to rotate, a housing that contains the spindle, a plurality of strain sensors provided on the housing, and a detector that detects wear or chipping of the tool, based on a waveform of a cutting force measured from an output signal from each of the plurality of strain sensors. The detector measures a waveform of a first cutting force, measures a waveform of a second cutting force, after measuring the waveform of the first cutting force, makes a comparison between the waveform of the first cutting force and the waveform of the second cutting force, and detects wear of the tool based on a result of the comparison.

Dependencies are inferred from the claim text.