Automatic leveling method and leveling device for hot bed of 3D printer

Abstract

The invention discloses an automatic leveling method and leveling device for a hot bed of a 3D printer. Spatial coordinates of arbitrary three points which are not located on the same straight line onthe hot bed are measured; spatial coordinates N(x,y,z) of all points on a spatial circle determined by the three points are calculated through the algorithm of determining a circle by threepoints; the highest point M and the lowest point m on the spatial circle are determined according to the z value, and a vector Mm connecting M and m and passing through the center of the spatial circle is obtained; the included angle lambda of the vector Mm and the X axis and the half height difference H of the vector Mm in the Z axis direction are calculated; the hot bed is driven to rotate bythe angle lambda along a vertical rotating shaft perpendicular to the XOY plane, and a horizontal rotating shaft is driven to drive the hot bed to swing by the height H; and the steps are repeated till measured H meet the precision requirement. According to the leveling method and the leveling device, automatic detection and leveling of the hot bed of the 3D printer can be achieved, and the quality of a 3D printed product is improved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing and relates to a hot bed of a 3D printer, in particular to an automatic leveling device for a hot bed of a 3D printer and a leveling method for automatically leveling the hot bed of a 3D printer by using the leveling device. Background technique [0002] 3D printing is a manufacturing method that adds materials point by point, line by line, and surface to form three-dimensional complex structural parts. On the one hand, 3D printing can be applied to the manufacture of almost any type of material; on the other hand, it has promoted the development of materials technology by creating a large number of new materials suitable for the unique process characteristics of 3D printing. [0003] The realization of 3D printing technology has greatly expanded the creativity and innovation space of products, shortened the new product development cycle, reduced the research and development cost, simplified t...

AI Technical Summary

Problems solved by technology

[0007] 1) Most of the hot beds of desktop 3D printers cannot achieve automatic leveling, and need to be manually leveled, and then verified through a certain calibration procedure. The leveling accuracy is poor, resulting in rough surface of the printed product, and even obvious cracks;

[0008] 2) The support surface of the leveling device of the desktop 3D printer is small, and the unsupported parts around or in the center of the hot bed are slightly deformed due to gravity, resulting in warpage at the contact position between the product and the hot bed;

[0009] 3) The existing desktop 3D printer leveling devices and methods are difficult to achieve real-time leveling, the distance between the printing nozzle and the sample cannot be monitored in real time, and it is difficult to control the printing accuracy during work

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