Computer Numerical Control (Computer Numerical Control), the basic idea of machine tools numbers, letters and so on. It is a system that consists of symbols and can operate with the help of commands coded according to a certain logic and program the part of the machine control unit (MCU).
In Computerized Numerical Control, as a result of computerization of the machine control unit, besides the programs can be kept, it is possible to stop the program at every stage of part production, to make necessary changes in the program, to continue the program from where it left off, and to store the program in its final form. For this reason, it is sufficient to upload the program to the control unit once. Transfers of programs to the workbench are perforated paper strips (Punched Tapes), Magnetic Tapes (Magnetic Tapes), etc. carried out via data carriers.