Machine tool and control device for the machine tool

A control device for a machine tool provided in the machine tool comprising a cutting tool for cutting a workpiece, a rotator that relatively rotating the cutting tool and a workpiece, a feeder that feeds the cutting tool and a workpiece in a predetermined feed direction, and a vibrator that reciprocally vibrates the cutting tool and a workpiece in a relative manner by applying relative forward and backward movements to the cutting tool and the workpiece,

• wherein the control device comprises;
• a controller making the machine tool perform vibration cutting to a workpiece via the relative rotation of the cutting tool and a workpiece and via feeding of a cutting tool to the workpiece with reciprocal vibrations,
• an input device for inputting a relative number of rotations or a relative number of vibrations of the cutting tool and a workpiece,
• a selector selecting a combination of each parameter consisting of a number of rotations and a number of vibrations that are obtained on the basis of a vibration frequency dependent on a period, in which an operating instruction can be executed to the vibrator, and the number of rotations or the number of vibrations that is input via the input device, and
• a setting device setting each parameter of the number of rotations and the number of vibrations in the controller on the basis of a predetermined combination selected from combinations that selected by the selector.