Vibration state detection device and machine tool including vibration state detection device

A machine tool comprising:

• a vibration state detection device comprising:
• an imaging device configured to image a plurality of driven elements to be driven by a drive unit of a machine tool, a control device including a vibration state analysis unit, and a driven element specification unit, wherein:
• the vibration state analysis unit configured to calculate a parameter corresponding to vibration of the driven element and including at least a vibration frequency, based on image data for each predetermined period of elapsed time acquired by the imaging device;
• the driven element specification unit configured to specify one driven element requiring control to suppress vibration from the plurality of driven elements, using the parameter corresponding to the vibration, the parameter being calculated by the vibration state analysis unit;
• and
• the imaging device is disposed to image the driven element from a direction different from a moving direction of the driven element when the driven element moves in translational motion;
• and
• a drive control unit configured to feedback-control the drive unit, wherein the drive control unit has a gain adjustment unit configured to reduce a gain to be used for amplification of a frequency component of the vibration of the driven element, determined from the image data, specified in a current command signal transmitted to the drive unit of the driven element specified.