To simply clear up the cause of trouble for a short time at the time of occurrence of the trouble, in an electromotive injection molding machine having a drive shaft driven by a plurality of servo motors.
The position data and torque command data of a master shaft 11a and a slave shaft 11b both of which drive an injection drive shaft 13 are sent to an injection drive shaft control part 6 from servo amplifiers 7a and 7b. The injection drive shaft control part 6 calculates the positions, speeds and torque data of respective servo motors 10a and 10b to send them to a main control part 3. The main control part 3 transmits the servo data of the respective shafts 11a and 11b to an injection shaft monitor part 4 and the injection shaft monitor part 4 sends the servo data while adds opposite time data thereto. When an operator selects either one of the servo motors, the torque waveform of the selected servo motor is displayed on a display part 5. When the operator selects two or more servo motors, the torque waveforms of the selected respective servo motors are superposed one upon another in the same graph to be displayed on the display part 5.
YAMAZAKI TAKASHI
Sadao Muramatsu
Atsushi Tsuboi
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Shoji Kawai
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