computer numerical control
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Computer numerical control (CNC) is a system that automatically operates machining tools by following instructions programmed into a computer beforehand. This matters because it allows machines to perform precise, repetitive manufacturing tasks with consistent accuracy and without requiring constant human operation.
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A CNC machine that operates on wood CNC machines typically use some kind of coolant, such as a water-miscible oil, to keep the tool and parts from getting hot. A CNC metal lathe with the door open. Computer numerical control (CNC) or CNC machining is the automated control of machine tools by a computer. It is an evolution of numerical control (NC), where machine tools are directly managed by data storage media such as punched cards or punched tape. Because CNC allows for easier programming, modification, and real-time adjustments, it has gradually replaced NC as computing costs declined.
A CNC machine is a motorized maneuverable tool and often a motorized maneuverable platform, which are both controlled by a computer, according to specific input instructions. Instructions are delivered to a CNC machine in the form of a sequential program of machine control instructions such as G-code and M-code, and then executed. The program can be written by a person or, far more often, generated by graphical computer-aided design (CAD) or computer-aided manufacturing (CAM) software. In the case of 3D printers, the part to be printed is cross-sectioned into virtual "slices" before the instructions (or the program) are generated. 3D printers also use G-Code.