![]() ![]() This can result in far smoother surfaces. Instead the surfaces are analyzed and the 3D printer is directed to move along the path of the model’s surface geometry in an attempt to match the non-planar surface. In this concept, the 3D model is not printed plane by plane. The answer, it seems, is called “non-planar” 3D printing. But others have resolved to print differently to solve the problem. Some have resorted to post-processing techniques to eliminate these unsightly structures. ![]() This results in highly noticeable “steps” appearing on the surface. While this works very well and is the basis for virtually all 3D printing taking place today, it is problematic when a surface happens to be at a slight angle to the layer plane. Printing takes place one plane at a time. ![]() This occurs because virtually all 3D print slicers, which generate specific machine actions, “slice” the 3D model into a series of adjacent horizontal planes. This is a highly desirable approach, as anyone who has 3D printed a not-quite-flat object will notice severe “stair stepping” patterns on the top surfaces. The nature of the controversy revolves around the master’s thesis by Daniel Ahlers, a visiting scientist at the University of Hamburg, where his thesis “3D Printing of Nonplanar Layers for Smooth Surface Generation”, published late in 2018, describes methods of slicing 3D printer models in a non-planar fashion to improve surface quality. ![]()
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