Research On Kenal Algorithms In SLA Type 3D Printing Software And Its Optimization

At present, there were many 3D Printing softwares at home and abroad, such as Slic3r, Meshmixer, Replicatorg, Forml, Magics and so on. However, these softwares have some shortages which reflected in the following two aspects,1.These softwares have a big room for improvement. There are some problems including layered, generate support and route planning in some 3D printing softwares. For example, the problem of displaying support and processing large file in the fore-ign slic3r. Because of the problem of displaying support, the user can't be found to whether the support structure can be withstand gravity of entire entity until the produ-ct is manufactured, the problem not only reduce the sense of the user experience of software, abut also indirectly the success rate of manufacturing product. The reduction of success rate in manufacturing product increase the risk of raw material waste and the time cost of research algorithm.2. Different type of 3D printing equipment, have their own unique demands for generating support and layered. For example, According to the type of 3D printing, the platform need different angle. The SLA type of 3D printing require resin tank has a certain angle. The FDM and SLS type of 3D printing always require platform which keeps a horizontal state or be fixed. However, currently most of 3D printing softwares mainly to design for Fused Deposition process (Fused Deposition Modeling, referred FDM) process.Thus, specific software for stereo lithography appearance (Stereo Lithography Appearance, referred SLA) as another type of 3D printing has great significance and potential market value.This article study and improve three core problems about SLA process of 3D printing software including support, layer, path planning, these improved algorithms shortern the time of generating model support, increase the success rate of model was made and effect of production surface. The major contents and achievements of this paper are concluded as follows,1. Generating support algorithm. It is not only the core part of the entire 3D printing software, but also directly related to the success of model making, This paper studies the various classificaty and traditional algorithm and propose a improvement program base on characteristic point. This improvement program can't spend much time on building complex topology of the edge or triangular facets Thus, it greatly shorten the search for characteristic elements of time to achieve the ultimate goal of shortening the time of generating support. Experimental results show the improvement algorithm, compare with the traditional algorithm which based on STL picking up surface region, has obvious advantage.2. Layered algorithm. The goal of layer is transfer three-dimensional file which can be displayd into a series of isolated two-dimensional layers. Based on the study of traditional layered algorithm, we found insufficient and propose a improvement program of an appropriate amount of space swap time. From the aspect of theory and practice tests to test the improvement program, the final results shows it can be shortern time.3. The path planning algorithm. The function of the path planning algorithm is cutting, based on a certain thickness, a model induing two-dimensional or three-dimensional into starting or ending point, which belong to two-dimensional segment, can be recognitied by computer numerical control (computer numerical control, referred CNC) machine tools. The traditional method is based on X, Y or arbitrary boundary lines. In this paper, we cutting boundaries base on the longest segment into irregular contour path.