| 摘要 |
PROBLEM TO BE SOLVED: To provide a servo pressing device of which safe operation is ensured even when a sensor signal to a control device has an abnormality.SOLUTION: A load controller 32 in a control device 30 calculates a rotation control signal for rotating a motor shaft at a predetermined angle to generate a press load corresponding to a load deviation signal. An adder 33 calculates a rotating position command signal to rotate the motor shaft of a servo motor 5 to a predetermined rotating position, based on the rotation control signal and a rotating position detection signal. A driver 34 supplies control electric power to the servo motor 5 to rotate the motor shaft to a rotating position corresponding to the rotating position command signal. By using the rotating position command signal for the driver 34 that calculates the control electric power supplied to the servo motor 5, safe operation of a servo pressing device 1 is ensured. |
