| 摘要 |
PURPOSE: To attain a driving device for a press, by which a working environment can be improved by quickly and correctly controlling, making the movement of a slide correspond to an object to be worked, reducing a working noise without lowering a productivity, and reducing the noise and the vibration of a hydraulic pulsation. CONSTITUTION: The flow rate of a variable capacity pump 5 is controlled by feeding forward by transmitting the target value of a crank rotation angle corresponding to a time by a controller 30, making the crank rotation angle a lead angle corresponding to the control lag of the variable capacity pump 5, etc., and inputting a transmitted command value in a regulator circuit 19. The rotation of a crank shaft 8 is approached to almost the target value. At the same time, the crank rotation angle transmitted from an encoder 31 is fed back to the controller 30, a main servo valve 25 is controlled by a deviation signal to the target value, a hydraulic motor 7 is driven by adding a flow rate corresponding to a deviation, and the rotation of the crank shaft 8 is aligned with the target value. |
