A servo position control method applied to engraving and milling machine

A control method and technology of engraving and milling machine, applied in the field of servo control, can solve problems such as large position error

Active Publication Date: 2016-02-10
NANJING ESTUN AUTOMATION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention discloses a servo position control method applied to an engraving and milling machine, which solves the problem that the position error of the X axis, Y axis and Z axis of the engraving and milling machine at the commutation point is relatively large when the existing control method is applied to the engraving and milling machine. big problem

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  • A servo position control method applied to engraving and milling machine
  • A servo position control method applied to engraving and milling machine
  • A servo position control method applied to engraving and milling machine

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] figure 1 It is a schematic diagram of the structure of the engraving and milling machine. The upper computer 10 outputs three position signals P-1, P-2 and P-3, which are respectively sent to the X-axis, Y-axis and Z-axis servo drivers in the form of pulses, and the X-axis and Y-axis and Z-axis servo drivers drive X-axis, Y-axis and Z-axis servo motors respectively. The Y-axis servo motor drives the workpiece processing table to move in the Y-axis direction; the Z-axis servo motor drives the spindle motor to move in the Z-axis direction, and the spindle motor drives the tool to rotate at high speed, responsible for engraving and milling the workpiece; the Z-axis servo motor and the spindle motor are integrated Driven by the X-axis servo motor, it moves in the X-axis direction.

[0026] figure 2 It is a schematic diagram of ...

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Abstract

The invention discloses a servo position control method applied to an engraving and milling machine. In the method, speed feed-forward and current feed-forward are introduced, an output signal of a position controller is added to a feed-forward speed signal output by a feed-forward controller, a speed signal fed back by a servo motor is subtracted from the sum to get an input signal of a speed controller, a position pulse signal sent by an upper computer is subjected to differential treatment by a feed-forward controller to obtain a feed-forward speed signal, an output signal of the speed controller is added to a current feed-forward signal output by the feed-forward controller, and a current signal fed back by the servo motor is subtracted from the sum to get an input signal of a current controller, wherein the current feed-forward signal is got after an acceleration current signal is added to a friction current signal. Current feed-forward plays a role in improving servo speed response, and speed feed-forward plays a role in improving servo position response. By means of the method, phase change point position errors of the X-axis, Y-axis and Z-axis of the engraving and milling machine are reduced, and workpiece machining precision and efficiency are improved.

Description

technical field [0001] The invention relates to a servo position control method applied to engraving and milling machines, in particular to a servo position control method applied to engraving and milling machines with speed feedforward and current feedforward, and belongs to the technical field of servo control. Background technique [0002] The engraving and milling machine is a CNC machine tool that uses small tools, high power and high-speed spindle motors. It is characterized by both engraving and milling. It is widely used in occasions where precision molds are processed in one time. [0003] based on figure 1 and figure 2 , to illustrate the basic composition of the engraving and milling machine control system: the upper computer 10 is responsible for completing the trajectory planning required for workpiece processing, and the servo drivers of the X-axis, Y-axis and Z-axis work in position mode and are responsible for receiving the pulse commands sent by the upper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/19
Inventor 范中华扶文树齐丹丹吴波
Owner NANJING ESTUN AUTOMATION CO LTD
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