Servo motor control system
AssigneeFanuc Corporation
InventorsKunitaka Komaki, Yasuharu Aizawa, Kazunari Aoyama
Life of this patent
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Abstract
In a servo control system, a numerical control device and at least one servo amplifier are connected to each other with a serial bus to control a servo motor connected to the servo amplifier. In this system, data transfer systems of at least two types for the serial bus are set, and a data transfer system is selected by a parameter set in the numerical control device.
Claims8
A servo motor control system in which a numerical control device and at least one servo amplifier are connected to each other with a serial bus to control a servo motor connected to the servo amplifier, wherein
- at least two types of data transfer systems are prepared for the serial bus, and
- a date transfer system is selected by a parameter which has been set in the numerical control device.
A servo motor control system in which a numerical control device and at least one servo amplifier are connected to each other with a serial bus to control servo motors connected to the servo amplifier, wherein
- at least two types of data transfer systems are prepared for the serial bus, and
- said numerical control device comprises:
- means for changing the frequency of signal change for a predetermined time in the data on the serial bus on the basis of a data transfer system selected from the at least two data transfer systems;
- means for monitoring data on the serial bus received from the servo amplifier connected to the serial bus to measure the frequency of signal changes for predetermined time, and deciding, on the basis of the measured frequency, whether the data transfer system of the servo amplifier is changed into the selected data transfer system or not;
- and
- means for performing communication by the selected data transfer system when said deciding means decides that the data transfer system is changed, and changing the data transfer system again when said deciding means decides that the transfer system is not changed and then searching for a possible data transfer system.
Dependencies are inferred from the claim text.