A 3D printing device and its laser positioning accuracy calibration method

By installing a small field-of-view CCD image acquisition system in a 3D printing device, observing the standard plate graphic array and calculating the deviation, the problems of high cost and error in the existing technology are solved, and low-cost, high-precision laser positioning calibration is achieved.

CN116809962BActive Publication Date: 2025-11-14HUNAN FARSOON HIGH TECH CO LTD
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Patent Information

Application Number
CN202310682443.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-06-09
Publication Date
2025-11-14
Estimated Expiration
2043-06-09

AI Technical Summary

Technical Problem

Existing laser positioning accuracy calibration methods are costly, dependent on medium quality, and have detection errors, making it difficult to achieve high accuracy and low cost in large-format calibration.

Method used

Installing a small field-of-view coaxial CCD image acquisition system in 3D printing equipment allows observation of the graphic array on a standard board through the imaging system, calculation of graphic position deviations, and generation of calibration files, thereby reducing the requirements for components and costs.

Benefits of technology

It achieves low-cost, high-precision laser positioning calibration, improving calibration efficiency and accuracy, eliminating the need for high-cost image acquisition systems and photoelectric sensors, and is highly adaptable.

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Abstract

A 3D printing device and its laser positioning accuracy calibration method are disclosed. The calibration method includes: placing a standard plate with several graphics on a working plane; setting an imaging system at the laser incident end of a galvanometer; keeping the laser off and controlling the galvanometer deflection to scan any position A of each graphic; acquiring an image of the standard plate observed under the reflection of the galvanometer at position A through the imaging system; performing image processing on the standard image; extracting the coordinate values ​​of the positioning patterns at position A of the corresponding graphics using a graphic recognition algorithm; forming an actual matrix with the coordinate values ​​of the positioning patterns corresponding to all graphics in the array; calculating the deviation between the coordinate values ​​of each positioning pattern in the actual matrix and the corresponding target coordinate values ​​in the target matrix; and generating a galvanometer accuracy calibration table using a calibration algorithm. This invention's laser positioning accuracy calibration method for the 3D printing device improves accuracy and is simple to implement.
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