In FANUC programming, what does "M-code" typically signify?

In FANUC programming, "M-code" signifies miscellaneous codes that are used primarily to control auxiliary functions of the machine. These functions can include operations such as turning the coolant on or off, starting or stopping spindle rotation, or controlling other non-cutting actions that support the machining process. M-codes provide flexibility in programming by allowing the operator to manage various machine settings and operations without altering the primary G-code commands that dictate movement and cutting paths.

M-codes are essential for the overall management of machine functions, enabling an operator to integrate different aspects of the machining cycle seamlessly. For example, while G-codes focus on the geometrical paths the tool will take, M-codes address other operational needs, making them vital for effective machining operations. This distinct role is why the other options do not accurately capture the full scope of what M-codes do.