Motor power interrupting device of injection molding machine
AssigneeFanuc Corporation
InventorsYuichi Hosoya, Hideki Koyama
Life of this patent
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Abstract
A controller of an injection molding machine stores used/unused information in relation to each of the maximum number of controllable servo amplifiers, outputs an interruption request signal requesting power interruption in a lump to apart of or all of these plurality of servo amplifiers, and receives a power interruption confirmation signal confirming that the motor power of the servo amplifiers is interrupted. Further, the controller determines, on the basis of the interruption request signal, the power interruption confirmation signal and the used/unused information, whether or not interruption driving the servo motor is normally operated.
Claims13
A motor power interrupting device of an injection molding machine, the injection molding machine comprising:
- n servo motors configured to actuate movable portions, wherein n≥2;
- m servo amplifiers configured to drive the n servo motors, wherein m≥n;
- and
- a controller configured to control the m servo amplifiers, wherein the controller is configured to interrupt power of the servo motors by requesting power interruption to the servo amplifiers,
- wherein the controller comprises:
- a memory which stores used/unused information indicating whether each servo amplifier among a maximum number of servo amplifiers controllable by the controller is used or unused;
- and
- a processor programmed to
- output a common interruption request signal requesting power interruption to a plurality of servo amplifiers among the m servo amplifiers,
- receive, from the plurality of servo amplifiers that have received the common interruption request signal, a power interruption confirmation signal confirming that the power of the servo amplifiers corresponding to the maximum number of servo amplifiers controllable by the controller is interrupted, and
- determine, on the basis of (a) the interruption request signal, (b) the interruption confirmation signal and (c) the used/unused information, whether or not the power interruption is normally operated,
- wherein
- the processor is programmed to determine that a first abnormality exists when
- the used/unused information corresponding to a servo amplifier among the maximum number of servo amplifiers controllable by the controller indicates that said servo amplifier is used, and
- the interruption request signal sent to said servo amplifier is ON, and
- the interruption confirmation signal returned from said servo amplifier in response to the interruption request signal is OFF.
Dependencies are inferred from the claim text.