CONTROL METHOD FOR DRIVING SYSTEM

PURPOSE:To eliminate the deviation of control timing between a rotation control system and a movement control system by providing a means which converts a driving command for one control system to another driving command for the other. CONSTITUTION:A central processing part 14 calculates the rotation control signal of a disk original board 1 and sends the result to a D/A converter 6 to convert it to an analog quantity. A voltage corresponding to the result is sent from the converter 6 to a V/F converter 5 and a computing element 13, and a rotation control signal fR corresponding to the inputted voltage is sent from the converter 5 to a rotary servo circuit 4. A processing part 14 calculates a constant for groove intervals of the original board 1 and sends the result to a D/A converter 12 to convert it to an analog quantity. A voltage corresponding to this constant is sent from the converter 12 to the computing element 13. The computing element 13 sends a voltage corresponding to the movement control signal to a V/F converter 11 in accordance with two input voltages, and the movement control signal corresponding to the input voltage is sent from the converter 11 to a movement servo circuit 10.