Patent ID: 6244848
Filing Date: 2001-06-12
Classification: B29C

Abstract:
A motor-driven injection molding machine, comprising:an injection device driven by a servo motor;a load cell for use in detecting a pressure of a molten resin stored in front of a screw;a position detector for detecting a position of the screw; anda controller for controlling said servo motor in accordance with detected values obtained by said load cell and said position detector,wherein said controller is configured to control said servo motor, in response to a command to adjust a zero point for said load cell, to move said screw a plurality of back and forth movements such that said screw is moved in a retracting movement and in an advancing movement during each back and forth movement, and calculates an average value of a corresponding plurality of detected values obtained by said load cell during each back and forth movement of said screw to adjust the zero point for said load cell.