CNC machines are devices used in the manufacturing industry. Computerized Numerical Control (CNC) means computer control of numerical devices. Numerical control systems are equipped with a computer unit that can be freely programmed. Common CNC devices are electronically set metalworking machines: lathes, EDMs and milling machines. The preceding CNC process is computer design (CAD) and project processing for device control (CAM). The CNC machine operator uses the HMI (operator panel interface) to set parameters for the materials being processed. The CNC device is a machining center, which in addition to the HMI includes min. machine heads, tool feeder, mechanical control systems, computer control systems (motherboards, expansion modules), cooling systems (fans, air conditioners).