CNC is the abbreviation of digital control,English is Numerical Control,referred to as NC.At present,the numerical control generally uses a general-purpose or special-purpose computer to realize digital program control.Therefore,the numerical control is also called Computer Numerical Control(CNC),which is generally referred to as CNC in foreign countries,and the concept of NC is rarely used again.
Specifically described below:
Numerical Control(NC)is a technique that uses digital commands consisting of numbers,characters,and symbols to implement motion control of one or more mechanical devices.It controls the mechanical quantities such as position,angle,speed,etc.and the amount of switching related to the flow of mechanical energy.The generation of numerical control relies on the emergence of data carriers and binary form data operations.In 1908,a perforated sheet metal interchangeable data carrier was introduced;at the end of the 19th century,a control system with paper as a data carrier and an auxiliary function was invented;in 1938,Shannon conducted rapid data calculation and transmission at the Massachusetts Institute of Technology.It laid the foundation for modern computers,including computer numerical control systems.CNC technology is developed in close cooperation with machine tool control.In 1952,the first CNC machine tool came out,which became an epoch-making event in the history of the world machinery industry and promoted the development of automation.
Nowadays,CNC technology is also called Computer Numerical Control.At present,it is a technology that uses computer to realize digital program control.This technique uses a computer to perform control functions on the device in accordance with a previously stored control program.The use of a computer to replace the original numerical control device composed of hardware logic circuits enables the realization of various control functions such as storage,processing,calculation,logic determination of input data,and can be completed by computer software.