| 摘要 |
<p>An inexpensive injection driving device which generates a large output torque and which exhibits good acceleration and deceleration characteristics in an injection molding machine in which a screw is driven by a servo motor to perform the injection. One or more ball screws (7) for driving the screw (2) in the axial direction are driven by a plurality of servo motors (M1, M2) and a position detector (P1) for detecting the screw position is provided for one servo motor (M1) only while power amplifiers are provided for each of the servo motors (M1, M2) and the power amplifiers are controlled by one control circuit, in order to control the servo motors (M1, M2) in synchronism with each other.</p> |
