M-codes, miscellaneous or machine codes, control the operations of the equipment telling it when to operate or cease operation. G-codes and M-codes work in unison for positioning a workpiece and guiding the machine‘s actions. M-code is a part of the language that AutoCAD and CAM, computer aided manufacturing, use to input instructions into CNC machines. Both types of coding are necessary for the system of a CNC device to perform correctly.
CNC operators are required to know the appropriate codes and instructions as well as how to use them. For a machine to interpret the commands from CNC, the commands have to be entered using G and M codes. The majority of machines operate using instructions and guidelines that have been downloaded using a CNC program controller. Computer numerical control (CNC) is a fundamental part of modern manufacturing.
