GRINDING DEVICE FOR VARIABLE CONTROL OF WHEEL AND ITS OPERATING METHOD

A grinding device for controlling an interval of a wheel variably, and the operation method thereof are provided to increase convenience of a user favorably by changing the interval of a grinding wheel without separating a processed object according to the size thereof. A grinding device for controlling an interval of a wheel variably comprises a grinding unit, and a control unit. The grinding unit is installed to change the interval of a grinding wheel(21). The control unit is connected with the grinding unit to control the interval of the grinding wheel according to an applied order. The grinding unit is formed with the plural grinding wheels, a shaft(25), a ball screw(23), and a linear scale(22). The shaft is configured to support the grinding wheel, and the ball screw is connected with the shaft and rotated to change the position thereof to move the grinding wheel. The linear scale is installed to detect the position of the ball screw. The operation method of the grinding device for controlling the interval of the wheel variably includes the step of driving a motor by comparing the position value of the detected ball screw with the set value.