Machine tool
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United States of America Patent
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Sep 8, 2020
Grant Date -
Dec 13, 2018
app pub date -
Dec 11, 2015
filing date -
Dec 11, 2015
priority date (Note) -
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Abstract
A machine tool is configured so that: a first frequency band comprising the main shaft characteristic vibration frequency and a second frequency band comprising the mechanical structure characteristic vibration frequency are set; thresholds are stored for each of the set frequency bands; vibration components are extracted for each of the frequency bands from the output of a vibration sensor; and when the vibration amplitude exceeds a threshold in either of the frequency bands, an alarm is sounded.
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