| 摘要 |
The present invention relates to the field of predictive maintenance. The invention provides a method, an installation and a machine fitted with installation for predictive (referred to also as preventive) maintenance of rotating machinery. The method being particularly useful for application to a multi-motor machine tool operating under Computer Numerical Control (CNC). The invention provides a method comprising the steps a) providing a program and inserting a card containing a program into the computer controlling a machine tool; b) providing a multiplexing device (MUX) and electrically connecting the MUX to each motor and to the computer; c) measuring or inserting the calculated constant load momentum of inertia (MOI) and constant driven by each motor and its constant load, d) successively running each motor + load alone from start to full speed and to unbraked stop; e) recording performance factors such as speed, current, voltage drop, and torque at motor shaft; f) calculating a plurality of relationships from the motor+ constant machine specific axis acceleration the motor minus constant machine specific axis, g) setting allowed limits to relationships referred to in step f); and h) displaying details of any relationship falling outside the limits.
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