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Print head and workpiece plane position calibration method

A technology of plane position and print head, which is applied in the field of calibration of print head and workpiece plane position, can solve problems such as low calibration efficiency and complicated calibration methods, and achieve the effect of improving efficiency, improving calibration efficiency, and improving positioning accuracy

Pending Publication Date: 2022-07-08
ENOVATE3D (HANGZHOU) TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The printing substrate surface height calibration and compensation method, device, electronic equipment and media provided by the present invention can print high-precision lines on rough or warped substrate surfaces by executing the height calibration compensation program; although the invention discloses the printing head, sensor and The relative position of the camera is calibrated, but the specific method of calibrating the print head, sensor and camera is not disclosed, and there are still technical problems such as complicated calibration methods and low calibration efficiency

Method used

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  • Print head and workpiece plane position calibration method
  • Print head and workpiece plane position calibration method
  • Print head and workpiece plane position calibration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The 3D printing equipment suitable for this position calibration method includes a two-dimensional drive platform 1 that can move in the XY direction, a bracket 2 that can move in the Z direction, and a calibration silicon wafer 3. The workpiece plane 4 is installed on the two-dimensional drive platform 1. A laser altimetry sensor 5 , a vertical industrial camera 6 , and an inclined industrial camera 8 are installed on the bracket 2 , and a lens is installed on the vertical industrial camera 6 to facilitate the vertical industrial camera 6 to focus on the product.

[0052] The method for calibrating the plane position of the print head and the workpiece includes the following steps:

[0053] (S1) The print head forms a print point on the workpiece plane, and the positional relationship between the print head and the camera cross center is calibrated according to the print point;

[0054] (S2) Setting a datum point on the workpiece plane, calibrating the positional relat...

Embodiment 2

[0081] This embodiment replaces the manual calibration step of step ( S1 ) in the first embodiment, and the rest of the calibration methods are consistent with the first embodiment.

[0082] The automatic calibration steps of step (S1) are as follows,

[0083] (1.1b) The print head discharges the material to form a print point on the workpiece plane, and the pixel position coordinates of the print point are (X1, Y1);

[0084] (1.2b) The equipment automatically drives the workpiece plane to move, the equipment automatically records the moving distance, and moves the printing point on the workpiece plane into the camera's field of view;

[0085] (1.3b) Calculate the distance between the print point in the camera's field of view and the center of the camera;

[0086] (1.4b) According to the distance obtained in step (1.3b) and the moving distance of the workpiece plane in step (1.2b), calibrate the positional relationship between the center of the camera and the print head.

[...

Embodiment 3

[0089] This embodiment replaces the automatic calibration step of step ( S3 ) in the first embodiment, and the rest of the calibration methods are consistent with the first embodiment.

[0090] The automatic calibration steps of step (S3) are as follows,

[0091] (3.1a) The printing needle discharges the material, drives the workpiece plane to move, and prints a rectangular wireframe on the workpiece plane. The rectangular wireframe forms four vertex coordinates (XP1, YP1) (XP2, YP2) (XP3, YP3) ( XP4, YP4);

[0092] (3.2a) After the printing is completed, drive the workpiece plane to move linearly along the X and Y directions;

[0093] (3.3a) During the movement, record the coordinate information of the laser sensor measuring the height at the maximum value, that is, the intersection of the laser sensor and the rectangular wire frame during the movement, and the coordinates of the intersection are (XL1, YL1) (XL2, YL2) (XL3 , YL3) (XL4, YL4);

[0094] (3.4a) Calculate the m...

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Abstract

The method for calibrating the positions of the printing head and the workpiece plane comprises the following steps: (S1) establishing a relationship between pixel coordinates and physical coordinates according to a position relationship between a calibrated printing datum point and the workpiece plane; (S2) printing points are formed on the plane of the workpiece, and the position relation between the printing points and the cross center of the camera is calibrated according to the printing points; (S3) calibrating the position relation with the center of a light spot of the laser height measurement sensor; and (S4) calibrating the position relation between the Z axis and the surface of the product.

Description

technical field [0001] The invention belongs to the technical field of 3D printing equipment, and particularly relates to a method for calibrating the plane positions of a printing head and a workpiece. Background technique [0002] 3D printing is a rapid prototyping technology that builds objects by layer-by-layer printing using bondable materials such as powdered metal or plastic based on digital model files. With the rapid development of the 3D printing industry, the demand for 3D printers is also increasing. When the 3D printer is used in specific occasions, the accuracy requirements of the model printed by the 3D printer are more stringent. If the deviation of the printed model is not found in time during the printing process, not only the printed product cannot be used, but also the printing materials and materials are wasted. Time; at present, the position calibration between the various parts of 3D printing equipment on the market is inaccurate, which affects the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01B11/14G01B11/06B29C64/30B33Y40/00
CPCG01B11/002G01B11/14G01B11/0608B29C64/30B33Y40/00Y02P10/25
Inventor 徐立鹏黄飞陈鲲钟昊涵
Owner ENOVATE3D (HANGZHOU) TECH DEV CO LTD
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