Rotary encoder eccentricity correction device

Abstract

The invention relates to a rotary encoder eccentricity correction device, which comprises a controller, a servo driver and a rotary encoder, wherein the controller generates a servo speed command according to the preset rotating speed of a rotary motor by a user; the servo driver is in signal connection with the controller for converting the servo speed command to a current control command to control the rotating speed generated by the rotary motor; the rotary encoder is electrically connected with the rotary motor, a speed feedback is generated after the operating axis of the rotary motor ismeasured, the speed feedback is transmitted to the servo driver and the controller, the controller receives the speed feedback, a speed error is generated according to a servo speed command, the errormodel for the speed error is a sine wave, the controller calculates a position eccentricity error according to the speed error, and the position eccentricity error is used as a correction table to enable the rotary encoder to perform self eccentricity correction according to the correction table. The operating precision of the rotary motor can be enhanced in real time, and the rotary motor can have good operating quality.

Description

technical field [0001] The invention relates to a rotary encoder, in particular to a rotary encoder with an eccentric correction function. Background technique [0002] Rotary encoders must have good precision, nothing more than precise selection of sensing principles, good hardware and software design, and highly repeatable mass production. However, even if all the above are guaranteed by the supplier, the accuracy of the rotary encoder is still not as expected due to the eccentricity error (error) caused by the on-site installation. The explanation of the so-called installation eccentricity error is as follows, and please refer to it together figure 1 . like figure 1 , Schematic diagram of the rotary encoder configuration. Wherein, the servo driver 100 drives the rotary motor 101 to run, and the rotary encoder 102 compensates the position and rotational speed of the rotary motor 101 in real time for the reference of the servo driver 100 to send a driving signal at the ...

AI Technical Summary

Problems solved by technology

Although this method of reducing eccentricity error is effective, it needs to install a larger correction module, which will increase the size of the entire rotary encoder module

In addition, adding multiple verification procedures will not only consume a lot of time when installing the rotary encoder, but also greatly reduce the user-friendliness of the product. Obtaining the qualification certificate of the verification program will cost additional expenses, making the time and money required to correct the eccentricity error rising costs

[0005] Furthermore, using the traditional calibration module, because its internal calculation method still cannot fix the accuracy error of the rotating motor or the machine, the accuracy error becomes a function of time, causing the rotating motor or the machine's axis to flutter, causing the servo drive It cannot be estimated according to a fixed axis of operation, making it difficult to control the rotating motor

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