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Positioning control method for numerical control system using asynchronous motor

A kind of technology of asynchronous motor and numerical control system, which is applied in general control system, digital control, electrical program control, etc., can solve the problem of high price of brake motor, achieve high positioning accuracy and reduce cost

Inactive Publication Date: 2017-01-04
深圳市合信自动化技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of the brake motor is relatively high, and in some occasions it is hoped that the cost can be further reduced

Method used

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  • Positioning control method for numerical control system using asynchronous motor

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Embodiment Construction

[0023] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] figure 1 It is a schematic diagram of the main flow of an embodiment of a positioning method of a numerical control system using an asynchronous motor provided by the present invention; in this embodiment, the numerical control system uses PLC combined with an asynchronous motor to achieve positioning. In some embodiments, The asynchronous motor driving the equipment can be an ordinary asynchronous motor or a variable frequency motor. It uses a frequency converter to control the speed of the asynchronous motor. An absolute encoder is installed on the equipment operation or the motor drive, and the signal of the absolute encoder is connected to the PLC. . The PLC can send a stop signal to the asynchronous motor and can control the speed of the frequency converter. Please combine figure 1 As shown, the method includes the following steps:

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Abstract

The invention discloses a positioning control method for numerical control system using asynchronous motor. The method comprises the following steps: when it is required to position a driving device, controlling through an asynchronous motor the driving device to be located at least in the first distance position of a target point; controlling the driving device through the asynchronous motor to move towards the target point wherein when the driving device reaches the distance of the target point that has been pre-stored as the current advance stop amount distance, the PLC outputs the stop command to the asynchronous motor; obtaining the advance stop amount in real time, after the asynchronous motor stops stably; determining whether the positioning of the driving device reaches the positioning accuracy; if the determining result reaches the positioning accuracy, completing the process of positioning according to the real time updating of the advance stop amount for the current stop amount; and otherwise, through the reverse turning of the asynchronous motor, controlling the driving device to move in the reverse direction until the first distance position of the target for positioning another time. With the technical schemes, it is possible to reduce the cost for numerical control system positioning.

Description

technical field [0001] The invention relates to the field of positioning of a numerical control system, in particular to a positioning control method of a numerical control system using an asynchronous motor. Background technique [0002] In the numerical control system, the "servo driver + servo motor" scheme is generally used to realize the position control of the drive equipment driven by the servo motor, but this scheme is generally costly. For cost-sensitive application fields, it is necessary to seek a cost-reducing scheme. . [0003] Now there are also some cost-reducing schemes, among which the use of cheap asynchronous motors to achieve positioning is a common scheme. When decelerating and stopping, it exceeds the target position. When it just exceeds, it can be accurately positioned by mechanical brake. However, the price of the brake motor is relatively high, and it is hoped that the cost can be further reduced in some occasions. Contents of the invention [...

Claims

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Application Information

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IPC IPC(8): G05B19/416
CPCG05B19/416G05B2219/34287
Inventor 王精
Owner 深圳市合信自动化技术有限公司