When a CNC system is turned on, the intended cuts are programmed into the software and sent to the appropriate tools and machinery, which do the prescribed dimensional jobs in a manner similar to a robot.

Even if there is a chance of errors when a CNC machine is instructed to cut in more than one direction at once, the code generator within the numerical system in CNC programming frequently treats mechanisms as if they are faultless. The component program, a set of inputs, specifies where a tool should be placed in a numerical control system.

Programs are entered onto numerical control machines using punch cards. Contrarily, tiny keyboards are used to input CNC machine codes into computers. A computer’s memory is used to store CNC programming.