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FDM works on the basis that different hot-melt filament-like materials, such as wax, ABS, and nylon, are heated and melted, and a computer is used to control the nozzle's movement in the x, y, and z directions. Extrusion of the filamentary material occurs through a nozzle with tiny nozzles after the material is heated in the nozzle to a temperature just over its melting point.  The basic idea behind SLA is to move vertically to the height of one layer in the direction of the lifting platform, cure the next layer, and then f... more