If you design an overhang less than 45 degrees from the vertical, you may be able to print the 3D object without using support structures. But they are vital for models where an overhang of more than 45 degrees is unavoidable or if your design includes bridge features.Īn overhang is where the material being extruded hangs over the previous layer to the point where it can’t be supported. To calibrate resin 3D prints, you should use a standard exposure test such as the XP2 Validation Matrix, the RERF test, or the AmeraLabs Town test to identify the ideal exposure for your specific resin. If you don’t use them carefully, they can also damage the surface of a model. ![]() ![]() So, if you have an overhang, you have no choice but to use a support structure.Īs you’d imagine, support structures increase the cost of materials and, because you have to remove them, the time and cost involved in post-processing. Each layer is supported by the one beneath it. ![]() You will need to work with support structures or overhangs when working with certain 3D printing processes, such as Fused Deposition Modeling (FDM) 3D printing technology (also known as Fused Filament Fabrication (FFF), Digital Light Processing (DLP), Liquid Crystal Display (LCD), Stereolithography (SLA) and Material Jetting (MJ).įDM works by depositing layers of melted filament material over a build platform until a part is completed.
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