Zero position-searching method for limited angle servo turntable

A servo turntable and zero-seeking technology, which is applied in the field of servo control, can solve the problems that the servo turntable cannot find the mechanical zero position, cannot start up and work normally, etc.

Active Publication Date: 2011-09-14
CHINA NORTH IND NO 205 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is simple, once the photoelectric switch is damaged, the servo turntable will not be able to find the mechanical zero position and cannot start up and work normally.

Method used

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  • Zero position-searching method for limited angle servo turntable
  • Zero position-searching method for limited angle servo turntable
  • Zero position-searching method for limited angle servo turntable

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Embodiment Construction

[0009] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0010] Depend on figure 1 It can be seen that the servo control circuit board is integrated with a controller, an I / O detection circuit, a current detection circuit, a pulse counter, a servo control circuit and a power drive circuit. As the core of servo control, the controller is also the core of realizing the present invention, and mainly completes the processing of the acquisition signal, information flow, control algorithm and control logic; the function of the I / O detection circuit is to detect the TTL level controlled by the photoelectric switch in real time signal, which provides the state of the detection signal for the controller, and thus serves as a reference mark for homing; the function of the current detection circuit is to detect the current value of the motor in real time, and use the detected current value as the cur...

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PUM

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Abstract

The invention discloses a zero position-searching method for a limited angle servo turntable and belongs to the technical field of servo control. In the method, an optoelectronic switch is installed between a mechanical zero position and a positive limit of the servo turntable; the position of the optoelectronic switch and the positive mechanical limit are respectively taken as a first reference point and an auxiliary reference point of the method; a motor rotates positively when the servo turntable turns on; and the motor can be controlled to reversely rotate at a corresponding known angle when a transistor-transistor logic (TTL) level signal controlled by the optoelectronic switch is searched or a current value of the motor is monitored to reach a set threshold value, and then the accurate mechanical zero position can be found out. According to the method, the zero position searching is performed by preferably using the first reference point and is carried out through the auxiliary reference point when the optoelectronic switch is out of work. Moreover, the zero position-searching reliability and the working stability of the servo turntable are improved by the method on the basis of not increasing any cost.

Description

technical field [0001] The invention belongs to the technical field of servo control, and mainly relates to a method for finding a mechanical zero position of a limited-rotation-angle servo turntable, in particular to a method for finding a mechanical zero-position of a limited-rotation-angle servo turntable with an incremental encoder when starting up. Background technique [0002] Incremental encoders for limited angle servo turntables are generally installed on the motor shaft or load shaft. The controller of the servo turntable can judge the rotation direction of the motor according to the order of the two pulses output by the encoder, and determine the limited rotation according to the number of pulses. The angular position of the corner servo turntable. This method requires first to determine the initial position of the motor rotor. Since the incremental encoder has no position memory function after the power is turned off, the initial position of the motor rotor is un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/18G01D5/36
Inventor 慕巍马优恒王小齐孟海江邢军智程刚胡博邱亚王若亮陆培国李广良王虎
Owner CHINA NORTH IND NO 205 RES INST
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