CONTROL SYSTEM FOR CONTROLLING MOTOR-DRIVEN INJECTION MOLDING MACHINE WITH IMPROVED RESPONSE

摘要

In a control system for controlling a motor-driven injection molding machine that comprises aninjection unit driven by a servo-motor and a speedfeedback control loop for controlling the servo-motor, anamplifier produces a command signal indicative of atorque command value for the servo motor in accordancewith a difference between a sensed speed value obtainedby a rotation speed sensor and a speed command value. Apressure sensor senses a pressure of resin within a moldto produce a sensed pressure signal indicative of asensed pressure. A correction amplifier amplifies thesensed pressure signal to produce an amplified signal asa correction value for a torque command value. An adderadds the torque command value and the correction value toproduce an addition result to a motor drive.