NC (English name: Numerical Control, NC) technology is to point to use Numbers, words and symbols of digital command to achieve one or more machinery equipment action Control technology. Numerical Control is generally realized by using general or specialized computer digital program Control, so the Numerical Control also called computer Numerical Control (Computerized Numerical Control), hereinafter referred to as CNC, foreign generally called CNC, rarely then use NC this concept. It is usually controlled by the position, Angle, speed and other mechanical quantity and amount related to the mechanical energy flow switch. The generation of nc relies on
Nc machine tools (3)
The emergence of data carrier and binary form data operation. In 1908, perforated metal sheet interchange type data carrier arrived; The end of the 19th century, paper as data carrier and auxiliary function of the control system was invented; In 1938, shannon in the United States at the Massachusetts institute of technology has carried on the data quickly and transmission, laid the modern computer, including the foundation of computer numerical control system. Numerical control technology is combined with machine tool control closely. The first CNC machine tool was developed in 1952, and become the world's industrial history a mechanical epoch-making event, to promote the development of automation.