High-precision smooth printing method of DLP (Digital Light Processing) photocuring 3D (Three-dimensional) printer

Abstract

The invention relates to a high-precision smooth printing method of a DLP (Digital Light Processing) photocuring 3D (Three-dimensional) printer. The method comprises the steps of according to a presetprinting layer height, slicing a three-dimensional model to be printed layer by layer for the first time, and obtaining multiple primary printing layers; slicing the primary printing layers sliced inthe step one for the second time, and obtaining secondary printing layers; according to the size of each sliced printing layer, horizontally slicing a profile of each printing layer, and slicing theprinting layers into grayscale blocks formed by tiny rectangles; carrying out gray compensation regulation on a grayscale block of a profile of an outermost ring of the three-dimensional model; and after accomplishing gray compensation, halving a gray value of the profile of the outermost ring of the three-dimensional model. The high-precision smooth printing method of the DLP photocuring 3D printer provided by the invention has the beneficial effects that longitudinal slices of the three-dimensional model are sliced for two times so as to obtain the primary printing layers and the secondary printing layers, so that the slicing layers are finer, the printing precision is improved, and the roughness of the outer profile of the three-dimensional model is improved.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a high-precision smooth printing method for a DLP photocuring 3D printer. Background technique [0002] 3D printing, also known as additive manufacturing, is a rapid prototyping technology. 3D printing is based on digital model files, using photosensitive materials such as special wax, powdered metal or plastic, and printing layers of adhesive materials to construct objects in a layer-by-layer manner. [0003] With the continuous development of 3D printing technology in recent years, more and more people have benefited from this technology, and various 3D printer products have also appeared on the market. Among them, Fused Deposition Modeling (FDM) 3D printers and Stereo lithography Appearance (SLA) 3D printers are the most widely used. Compared with FDM 3D printers, SLA has the advantages of printing speed and printing accuracy. Or the smoothness of the printing surface should be be...

AI Technical Summary

Problems solved by technology

[0005] When slicing a 3D model vertically, the thickness of the slice will affect the smoothness of the outer contour after the model is printed. The thickness of the slice is controlled by the vertical axis driven by the transmission motor. In the case of precision printing, it is easy to cause the outer contour to be rough.

Moreover, the current DLP printers are not careful enough in processing the outline, and it is difficult to meet the precision requirements.

Images