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Numerical-control device

A technology of numerical control device and moving body, which is applied in the direction of program control, computer control, general control system, etc., and can solve the problems of reduced machining accuracy

Active Publication Date: 2014-10-01
BROTHER KOGYO KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method described in the above-mentioned gazette can well compensate for misalignment during reverse rotation and movement, but it becomes overcompensated when stopped, and there is a technical problem of lowering machining accuracy.

Method used

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Embodiment Construction

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, up and down, left and right, and front and rear indicated by arrows in the drawing are used. The left-right direction, front-rear direction, and up-down direction of the table mechanism 20 are the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively. figure 1 The shown table mechanism 20 is provided in a machine tool (not shown). The table mechanism 20 supports the table 3 so as to be movable in the X-axis direction and the Y-axis direction. The spindle (not shown) of the machine tool can be raised and lowered in the Z-axis direction. The numerical control device 1 controls the movement of the spindle and the table mechanism 20 according to a path specified by an NC (numerical control) program, and performs cutting on a workpiece (not shown) fixed on the table 3 by a jig.

[0020] refer to figure 1 The configur...

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Abstract

The utility model discloses a numerical-control device, and the device can precisely compensate the dislocation generated by reverse rotation of a shaft in a movement direction. The device comprises a compensator which can calculate a dislocated value. The dislocation is generated caused by the elastic deformation of a workbench mechanism after the movement direction of a workbench is reverse. The compensate judges whether the workbench is in movement or stops (S1). When the workbench is in movement (S1: no), a compensation value is calculated through a formula (1) (S2), wherein the formula (1) is a formula for calculating the compensation value through the addition of a proportional value of the movement of the workbench (3) and a last compensation value. When the workbench stops (S1: yes), the compensation value is calculated through a formula (2) (S5), wherein the formula (2) is a formula for calculating the compensation value based on a torque instruction. Therefore, the device can precisely compensate the dislocation according to the conditions that the workbench is in movement, in reverse rotation, or stops.

Description

technical field [0001] The invention relates to a numerical control device. Background technique [0002] Machine tools experience hysteresis due to elastic deformation of the mechanism when the direction of movement of the drive shaft is reversed. Hysteresis is called misalignment, which is a cause of reduction in machining accuracy. In order to compensate for the misalignment, the numerical control device predicts an amount corresponding to the misalignment when the moving direction is reversed, and adds it to the command position. In Japanese Patent Laid-Open No. 1996-152910, the misalignment is compensated using a function whose input is the distance from the reversed position and whose output is the compensation amount. In Japanese Patent Laid-Open No. 154007 of 1998, similarly, the misalignment is compensated using a function of the distance from the reversal position, but the rise of the misalignment is fitted using an exp function (exponential function). The metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/404
Inventor 寺田弦小岛辉久
Owner BROTHER KOGYO KK
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