A FX2 PLC as master control unit combined with a MR-J2 servo motor, an orientation module and a servo amplifier to make a system. A motor was accurately controlled by using the features of position control and multistage velocity control of the servo motor through the form address orientation method and an optimization project of dual control for position and velocity was deduced. The duel control project ensures both the precision and the speed of the system. The system realized variable scale cutting, which met the requirement of special transformer. The operating tests indicated that of the cutter satisfied the technical specifications completely.