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==Machines for fabrication==
Three
1. [[CNC router]]
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===CNC milling machine===
CNC stands for "computer numerical control". CNC mills or routers include proprietary software which interprets 2D vector drawings or 3D models and converts this information to a [[G-code]], which represents specific CNC functions in an alphanumeric format, which the CNC mill can interpret. The G-codes drive a [[machine tool]], a powered [[Machine|mechanical device]] typically used to fabricate components.<ref>{{Cite web|title = Five CNC Myths and Misconceptions {{!}} Modern Machine Shop|url = http://www.mmsonline.com/columns/five-cnc-myths-and-misconceptions|website = www.mmsonline.com|access-date = 2016-02-17|first = Mike|last = Lynch}}</ref> CNC machines are classified according to the number of axes that they possess, with 3, 4 and 5 axis machines all being common, and industrial robots being described with having as many as 9 axes. CNC machines are specifically successful in milling materials such as [[plywood]], [[plastics]], [[foam board]], and metal at a fast speed. CNC machine beds are typically large enough to allow 4' × 8' (123 cm x 246 cm) sheets of material, including foam several inches thick, to be cut.
===Laser cutter===
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====Selective laser sintering====
Selective laser sintering uses a laser to trace out the shape of an object in a bed of finely powdered material that can be fused together by the application of heat from the laser. After one layer has been traced by a laser, the bed and partially finished part is moved out of the way, a thin layer of the powdered material is spread, and the process is repeated. Typical materials used are alumide, steel, glass, thermoplastics (especially nylon), and certain ceramics. Example devices include the Formiga P 110 and the Eos EosINT P730.
====Powder printer====
Powder printers work in a similar manner to SLS machines, and typically use powders that can be cured, hardened, or otherwise made solid by the application of a liquid binder that is delivered via an inkjet printhead. Common materials are plaster of paris, clay, powdered sugar, wood-filler bonding putty, and flour, which are typically cured with water, alcohol, vinegar, or some combination thereof. The major advantage of powder and SLS machines is their ability to continuously support all parts of their objects throughout the printing process with unprinted powder. This permits the production of geometries not easily otherwise created. However, these printers are often more complex and expensive. Examples of printers using this method are the ZCorp Zprint 400 and 450.
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