From FIRSTwiki

Fabrication refers to the actual building of the robot. Prior to fabrication, the robot must be conceptualized and designed. Once the robot is fabricated, it must be programmed.

Teams are given six weeks to build the robot, during which the entire process -- from brainstorming to implementation and ultimately testing -- must take place. There are several guidelines to building the robot. Each team starts with the same kit of parts and must follow the rules of the specific game.

Phases

Fabrication is divided into several phases, beginning with the arrival of raw materials and COTS parts.

Machining

During the machining process, the parts for the robot are created from raw materials. This phases involves cutting, drilling, milling, or turning. Parts are often machined from sketches or CAD drawings. Common materials include aluminum, steel, polycarbonate, and polyethylene.

Assembly

During the assembly phase, the parts of the robot, including machined parts and COTS parts are assembled. Most parts require some kind of fastener, but other methods of assembly include welding, adhesives, and snap-in parts.

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