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Fused filament fabrication (FFF) is an additive manufacturing technology used for building three-dimensional products, prototypes or models. It is a rapid prototyping and manufacturing technique that adds layer after layer of molten plastic to create a model or product.
Fused filament fabrication is also known as fused deposition modeling or fused deposition method.
FFF works like any other additive manufacturing process. Typically, the FFF mechanism consists of a nozzle that emits material and deposits it onto a moving table. The FFF machine takes input from a CAD/CAM powered computer and starts moving the nozzle on the surface in accordance with the coordinates. The material is heated in the nozzle to form liquid, which solidifies immediately when it's deposited onto the layer surface. The nozzle works layer by layer until the product is finished, at which point the table helps move the overall structure to position it in line of the nozzle or under the development layer.