Patent ID: 8720328

Claim:
A control device of a servo press for pressing by transferring a drive force of a servo motor to a slide via a drive mechanism, the control device comprising: an encoder for outputting current position data; a press information storage unit for storing information unique to a press device; a motion data setting unit for setting therein a slide position and a slide speed; a motion calculation unit for calculating slide target position data on a basis of information in the encoder, the press information storage unit, and the motion data setting unit; a torque calculation unit for calculating process torque for pressing and control torque for speed variation of the servo motor on a basis of the slide target position data; a process system limit unit for limiting the calculated process torque to predetermined torque; and a drive system limit unit for limiting combined torque of the limited process torque and the control torque to predetermined drive torque, the servo motor being driven on a basis of the limited drive torque, wherein the torque calculation unit includes: a process torque generation unit for calculating and outputting process torque on a basis of the slide target position data and the current position data output from the encoder; and a control torque generation unit for calculating and outputting the control torque by combining acceleration-deceleration torque and inertial torque on a basis of the slide target position data and the information unique to the press device.