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Grating ruler performance testing method and system

A detection method and detection system technology, applied in the direction of measuring/indicating equipment, metal processing equipment, metal processing machinery parts, etc., can solve the problem of high cost, achieve convenient regular maintenance, assist in the analysis of processing problems, and quickly and effectively perform well. Effect

Active Publication Date: 2020-02-04
SHANGHAI LYNAC NUMERICAL CONTROL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the defect of high cost of grating ruler performance detection equipment in the prior art, and provide a low-cost grating ruler performance detection method and system

Method used

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  • Grating ruler performance testing method and system
  • Grating ruler performance testing method and system
  • Grating ruler performance testing method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment provides a grating ruler performance detection system, such as figure 1 As shown, the grating ruler performance detection system includes: numerical control module 101, signal acquisition module 102, following error calculation module 103, effective data interception module 104, equal interval module 105, high-pass filter 106, feature value acquisition module 107, performance Evaluation module 108 . The numerical control module 101 is used to control the movement of each movement axis of the machine tool 1 according to the numerical control program; the signal acquisition module 102 collects the command speed Cmd_Org_V{n} and the command position Cmd_Org_P{n} during the movement of the machine tool 1; the following error calculation module 103 is used for computer The following error Org_Fle{n} during the motion of the bed, the following error is the difference between the command position Cmd_Org_P{n} and the actual position Act_Org_P{n}, the actual pos...

Embodiment 2

[0061] This embodiment provides a grating ruler performance detection method, as shown in the figure, the grating ruler performance detection method includes the following steps:

[0062] S201. Run the CNC program to control the movement of each movement axis of the machine tool, use the signal acquisition module to collect the command speed Cmd_Org_V{n} and command position Cmd_Org_P{n} during the machine tool movement, and use the grating ruler to be measured to obtain the actual position Act_Org_P of the machine tool movement {n}.

[0063] S202. Obtain the following error Org_Fle{n} during the movement of the machine tool. The following error is the difference between the command position and the actual position, that is, Org_Fle{n}=Cmd_Org_P{n}−Act_Org_P{n}. The "following error" includes the periodic fluctuation component of the feedback signal of the scale due to the measurement deviation within a single pitch. Preferably, in order to make the sampling data (command spe...

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Abstract

The invention discloses a method and a system for detecting performance of a grating scale. The method for detecting performance of the grating scale comprises the following steps of: operating a numerical control procedure to control each motion axis of a machine tool to move, using a signal acquisition module to acquire instruction speed and an instruction position, in a motion process, of the machine tool, and using a to-be-detected grating scale to obtain a practical position of motion of the machine tool; obtaining following errors of the motion process of the machine tool; forming an effective instruction position and effective following errors according to the instruction speed; enabling the instruction position to be equally spaced; obtaining a following error data sequence with equal position spacing through a linear interpolation method for the effective following errors; obtaining a filtered following error data sequence through a band-pass filter; and obtaining a characteristic value of the filtered following error data sequence, and evaluating the performance of the to-be-detected grating scale according to the characteristic value. With the adoption of the low-cost technical scheme, high-precision detection is realized for the performance of the grating scale.

Description

technical field [0001] The invention belongs to the technical field of grating ruler performance detection, and in particular relates to a grating ruler performance detection method and system. Background technique [0002] Grating ruler, also known as grating ruler displacement sensor (grating ruler sensor), is a measurement feedback device that uses the optical principle of grating to work. Grating rulers are often used in closed-loop servo systems of CNC machine tools, and can be used to detect linear displacement or angular displacement. The grating ruler has the characteristics of large detection range, high detection accuracy and fast response speed. It is often used as a feedback element for the servo full-closed-loop control of the feed axis of CNC machine tools. It can meet the high dynamic response requirements of CNC machine tools and is indispensable for high-speed and high-precision CNC machine tools. lack of technical means. The performance of the grating rul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q17/00B23Q17/24
CPCB23Q17/00B23Q17/24
Inventor 卢红星
Owner SHANGHAI LYNAC NUMERICAL CONTROL TECH CO LTD