Apparatus of compensating rotational unbalance of turntable of machine tool and method thereof

A method of compensating a rotational unbalance of a turntable of a machine tool, comprising:

• a turntable rotation step (S10) that rotates the turntable at a preset reference speed;
• a signal analysis step (S20) that receives a vibration signal and a number of rotations of the turntable through a vibration sensor and a proximity sensor, converts the vibration signal into a vibration velocity through a signal processing procedure, and calculates a rotational unbalance of the turntable based on the vibration velocity and the number of rotations;
• a compensation determination step (S30) that compares the vibration velocity analyzed in the signal analysis step (S20) with the preset reference vibration velocity, terminates a compensation work of the rotational unbalance of the turntable when the vibration velocity of the turntable is smaller than the reference vibration velocity, and proceeds a next step for compensating the rotational unbalance of the turntable when the vibration velocity of the turntable is greater than the reference vibration velocity;
• a rotational unbalance compensation parameter calculation step (S40) that calculates a compensation mass, a compensation distance, and a compensation phase angle for compensating a rotational unbalance amount when the vibration velocity of the turntable is greater than the reference vibration velocity in the compensation determination step (S30);
• and
• a rotational unbalance compensation step (S50) that installs the compensation mass on the turntable in response to the compensation mass, the compensation distance, and the compensation phase angle calculated in the rotational unbalance compensation parameter calculation step (S40), and returns to the signal analysis step (S20) by rotating the rotation table at a preset reference speed.