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44. Computer Numerical Control (CNC)

CNC is the short form of Computer Numerical Control, which is one kind of rapid prototyping technologies.

In modern CNC systems, end-to-end component design is highly automated using CAD/CAM programs. The programs produce a computer file that is interpreted to extract the commands needed to operate a particular machine, and then loaded into the CNC machines for production tooling. Since any particular component might require the use of a number of different tools - drills, saws, etc. Modern machines often combine multiple tools into a single "cell". In other cases, a number of different machines are used with an external controller and human or robotic operators that move the component from machine to machine. In either case, the complex series of steps needed to produce any part is highly automated and produces a part that closely matches the original CAD design.