Servo system and reading device for the position of its output shaft

Abstract

The present invention provides a reading device of the position of an output shaft and a servo system. The servo system comprises at least one output shaft, and each output shaft is provided with an absolute encoder; the reading device comprises: at least one cylinder number obtaining module consisting of at least one input end, wherein the inputting ends of the cylinder number obtaining modules is in one-to-one correspondence with the output shafts; each input end of the cylinder number obtaining module is connected with the output end of the absolute encoder on the corresponding output shafts; the servo system also comprises a single-chip microcomputer, after the single-chip microcomputer receives a reading instruction emitted by the master control device, the single-chip microcomputer controls the cylinder number obtaining module to obtain the cylinder number of the rotation of the output shaft required by the reading instruction and sends the obtained cylinder number to the master control device through a serial port. The servo system and the reading device of the position of the output shaft employ the reading device to read the absolute position of a plurality of output shafts so as to reduce the number serial ports of the master device, reduce the cost and enlarge the model selection range of the master control device in the servo system application.

Description

technical field [0001] The invention relates to the field of servo motors, in particular to a device for reading the position of an output shaft of a servo system and a servo system including the device. Background technique [0002] Servo drives (for example, multi-axis Yaskawa servo drives) mostly include multiple output shafts. In order to better control the servo drive motor, the main controller as the upper computer needs to accurately obtain the absolute position of each output shaft. [0003] Usually, the main controller is connected to the servo drive interface PA+ and PA- through multiple 232 to 422 interfaces, and controls the SEN signal of the servo drive through I / O, obtains the number of turns of the electrode, and then sends the number of turns to To the main controller, there is said main controller to calculate the absolute position of each output shaft. This requires the main control device to have multiple serial ports and multiple I / O ports, which increas...

AI Technical Summary

Problems solved by technology

This requires the main control device to have multiple serial ports and multiple I / O ports, which increases the cost of the main control device and limits the selection of the main control device

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