DLP three-dimensional printer and printing method thereof

Abstract

The invention discloses a DLP three-dimensional printer and a printing method thereof. A slice result of a model to be printed is mapped according to a set mapping relation to generate a printing picture, wherein the set mapping relation reflects a current printing environment, the printing picture is correspondingly adjusted, so that the printing result of each layer approaches slice data with high precision, and thus the printing precision is guaranteed. By adjusting the printing picture, a current printing environment is adapted to. In this way, it is avoided that a user makes adjustment onprinter hardware, the design and production difficulty is lowered, the cost is lowered, and the stability is improved. Subjective factors are avoided, and the printing precision is improved.

Description

technical field [0001] The invention belongs to the technical field of DLP three-dimensional printing, and in particular relates to a DLP three-dimensional printer and a printing method thereof. Background technique [0002] The working principle of the DLP three-dimensional printer is: the sliced ​​results of each layer are projected onto the printing plane through a projector to cure the resin. In the prior art, the printing accuracy is ensured by manually adjusting the optical path. The projector projects a fixed-shaped image onto the printing plane, and then uses the standard model for comparison. By adjusting the position of the projector and the printing plane, the projected image is completely consistent with the standard model. For example, the patent document with the publication number CN106827515A discloses a 3D printing imaging calibration method. The image of the calibration plate located in the imaging area is acquired by a CCD imaging device, and the measurem...

AI Technical Summary

Problems solved by technology

[0003] However, manually adjusting the optical path is too subjective and inaccurate, and requires high professional ability for printer calibration personnel, while printer users lack such professional ability. Setting an automatic adjustment device on the printer for calibration is obviously not good for the high manufacturing cost. Reality

Moreover, because the spatial position relationship between the projector and the printing plane, the internal parameters of the projector, and even the entire printing system will have an impact on the one-to-one mapping relationship between the points in the projector image plane and the points in the printing plane, especially the projection The nonlinear distortion of the instrument cannot be eliminated by adjusting the optical path

Therefore, it is very difficult to calibrate the printer, and the printing accuracy is difficult to guarantee

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