CNC machining refers to the processing carried out with CNC machining tools. CNC index control machine tools are programmed and controlled by a CNC machining language, usually G-code. The G-code language of CNC machining tells the machining tool of CNC machine tools what Cartesian position coordinates to use, and controls the feed speed and spindle speed of the tool, as well as the tool changer, coolant and other functions. CNC machining has great advantages over manual machining, such as the parts produced by CNC machining are very accurate and repeatable; CNC machining can produce parts with complex shapes that cannot be done manually. CNC machining technology has been widely promoted, most of the machining workshops have CNC machining capabilities, the most common CNC machining methods in the typical machining workshop are CNC milling, CNC turning and CNC EDM wire cutting (EDM wire cutting).
The tools for CNC milling are called CNC milling machines or CNC machining centers. The lathe that performs CNC turning is called a CNC turning center. CNC machining G-code can be programmed manually, but usually machine shops use CAM (computer-aided manufacturing) software to automatically read CAD (computer-aided design) files and generate G-code programs to control CNC machine tools
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