| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 106 === This study is mainly aimed at reducing the accuracy of the printed object features and the poor edge sharpness when using the LCD panel in Vat Polymerization technology. (This 3D printing system uses the LCD panel on the mobile phone to project the sliced image file to the resin tank. At the bottom, for the photo-curing 3D printing of the down-light type), in order to understand the cause of this phenomenon more intuitively, other applications such as other commercial down-lit LCD columns are compared to other applications of Vat Polymerization technology. In the printing machine, the biggest difference is the light divergence angle. The light divergence angle refers to the viewing angle of the LCD panel. In applications other than 3D printing, the higher the viewing angle, the better. However, in 3D printing, the height is high. The viewing angle means a high divergence angle, which leads to a lack of concentration of energy diffusion, resulting in reduced accuracy. In order to improve the accuracy reduction problem, this study simulates with matlab, allowing researchers to understand the interaction between exposure pattern, light divergence angle and resin curing range.
Previous studies [16] and [17] have shown that the radiated power radiated from the LCD panel by a single pixel exhibits a Gaussian distribution. In order to obtain the radiant power of the LCD panel, the "integral sphere" is used. The standard calibration source is measured, and the Radiant flux is divided by the panel area or panel resolution to obtain the parameters required for the simulation.
Finally, the test block is printed and the model is fine-tuned, and then the test block is corrected and printed according to the simulation result. The corrected printing result indicates that the corner portion of the feature graphic in the test block is corrected, and the dimensional precision is high, and the edge is obtained. Sharp print items.
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