Patent ID: 7685860

Claim:
A control device, of a press machine having a slide and a die cushion generating a force applied to the slide by using a servomotor as a drive source, the control device comprising: a slide control part for controlling the motion of the slide; a die cushion control part for controlling the motion of the die cushion and having a first detector for detecting a malfunction of the die cushion, the die cushion control part being configured to stop the motion of the die cushion when the first detector detects a malfunction of the die cushion; and a first transmitter for transmitting an abnormal signal indicating the malfunction of the die cushion to the slide control part when the first detector detects a malfunction of the die cushion; wherein the slide control part is configured to move the slide, when receiving the abnormal signal from the first transmitter, such that the slide is away from the position of the die cushion at the time of receiving the abnormal signal by a certain distance and, to stop the slide.