In other words, changing the build orientation, changes the slicing and the slices. It should be noted that the part orientation is mentioned in the slicing step. The input for the slicing step is the CAD file (usually STL) and the output is a 3D printer readable file called G-code. These slices when stacked and joined over each other form the complete CAD model. After geometry finalization, the next step is slicing.Īs mentioned before, the CAD model is various 2D lamellas called slices.
For example, the CAD model of a cube will have 12 triangles (right-angled, isosceles), 2 on each face, in the STL format.
stl. Standard Tessellation Language or STL is a file format that saves the CAD model in the form of simplest 2D structures, triangles. Some of the popular ones are SolidWorks, SpaceClaim, PTC Creo, Catia, AutoCAD etc. Many commercial softwares are available for the same. There are various 3DP techniques available today but all follow the same basic process flow comprising of CAD, Slicing and Deposition. The starting element is the CAD file which is a software based representation of a physical object. Therefore, it is also called as Rapid Prototyping. Because of this layered/deposition nature, 3DP is also known as Layered Manufacturing/ Additive Manufacturing. 3DP saves design iteration time and reduces the overall ‘time to market’ period. These slices are than stacked over each other and joined to form the complete 3D solid. These slices or lamellas, marks the transition from 3D to 2D and are deposited one at a time. It is a non-conventional technique, which basically means that it is significantly younger than other manufacturing processes like casting, welding, forming and machining, but still old enough to achieve ground breaking research work.ģD printing is done layer-by-layer, where the whole CAD model is disassembled into various slices of very small thickness. 3D printing (3DP), as the name suggests, is a manufacturing process that enables physical or 3D realization of a computerized model, referred as CAD (Computer-Aided Design).
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