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Servo motor controller, control method and computer-readable medium

A servo motor and control device technology, applied in the direction of single motor speed/torque control, AC motor acceleration/deceleration control, computer control, etc., can solve the problem of large error in the radial direction and achieve the effect of precise control

Inactive Publication Date: 2018-06-12
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In this way, in the arc waveform, at the four positions where the quadrant is switched, a certain servo motor reverses, so there is a tendency for the error in the radial direction to increase.

Method used

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  • Servo motor controller, control method and computer-readable medium
  • Servo motor controller, control method and computer-readable medium
  • Servo motor controller, control method and computer-readable medium

Examples

Experimental program
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Effect test

Embodiment Construction

[0032] Hereinafter, an example of the embodiment of the present invention will be described.

[0033] In this embodiment, a servo motor control device 100 for a machine tool will be described. figure 1 A block diagram of the configuration of the servo motor control device 100 is shown. Like a conventional servo motor control device for a machine tool, the servo motor control device 100 generates a speed command Cv to the servo motor 200 and drives the servo motor 200 based on the speed command Cv.

[0034] Therefore, the servo motor control device used in a conventional machine tool can be easily replaced with the servo motor control device 100 of this embodiment. In other words, the characteristic configuration in this embodiment is the servo motor control device 100 , and other configurations are the same as those of conventional machine tools.

[0035] Such as figure 1 As shown, the servo motor control device 100 includes: a speed command generation unit 102, a reverse...

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PUM

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Abstract

The invention provides a servo motor controller, a control method and a computer-readable medium. The servo motor controller comprises a command generating part for generating a position / speed commandof a servo motor at every scheduled period; a determining part for determining that the servo motor is performing reversal or movement from stop at every scheduled period; an acceleration calculationpart for obtaining the acceleration of the servo motor based on the determination result; and a compensation amount calculation part for calculating a compensation amount for compensation of delay ofthe servo motor. The acceleration calculation part obtains the acceleration even after the servo motor performs reversal or movement from stop. The compensation amount calculation part calculates thecompensation amount according to the obtained acceleration, even after the servo motor performs reversal or movement from stop.

Description

technical field [0001] The present invention relates to a control device for a servo motor that drives a shaft of a machine tool. In particular, it relates to a servomotor control device, a servomotor control method, and a computer-readable medium on which a computer program is recorded, capable of more appropriately obtaining a correction amount for compensating for a delay in an operation command of a servomotor. Background technique [0002] In a machine tool in which a shaft is moved by a servo motor, the magnitude of friction changes when the direction of movement of the shaft is reversed, that is, the direction of rotation of the servo motor driving the shaft is reversed. In other words, the magnitude of friction changes sequentially in the manner of "dynamic friction → static friction (greater than dynamic friction) → dynamic friction", so if the servo motor (and its control device) always responds the same, there may be a delay in the static friction area where the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/404G05B19/4062G05B19/416
CPCG05B19/404G05B19/4062G05B19/416G05B2219/41001G05B2219/45136G05B2219/41084G05B2219/41155G05B2219/41157H02P6/06H02P6/30H02P23/20
Inventor 猪饲聪史熊本裕树
Owner FANUC LTD
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