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Digital Control Of Numbers, Words And Symbols To Control The Motion Of One Or More Mechanical Devices
Jul 09, 2018

A digital controller (commonly referred to as a numerical control system) is the backbone of a numerically controlled machine tool. Generally, an ordinary numerical control machine tool is composed of an input device, a memory, a controller, an arithmetic unit, and an output device. The numerical control device receives the information of the input medium, and identifies, stores, and calculates the code, and outputs a corresponding command pulse to drive the servo system, thereby controlling the machine tool motion. In a computer numerically controlled machine tool, since the computer itself contains the above-mentioned unit such as an arithmetic unit and a controller, the function of the numerical control device is performed by one computer.

The numerical control device is a dedicated electronic computer that controls the machine tool and completes the automatic processing of the parts. It receives digitized parts drawings and process requirements and other information, performs interpolation operations according to certain mathematical models, and uses the calculation results to control the speed and position of each motion coordinate of the machine tool in real time to complete the machining of parts.

The numerical control system is a digital control system (Digital or Numerical Control System). It was originally composed of hardware circuits, called hardware NC (Hard NC). After the 1970s, hardware circuit components were gradually replaced by special computers called computer numerical control. Computerized Numerical Control (CNC). The computer numerical control system is a system that uses a computer to control the processing functions and realize numerical control. The CNC system performs some or all of the numerical control functions according to the control program stored in the computer memory, and is equipped with a dedicated computer system of the interface circuit and the servo drive device. By using digital commands consisting of numbers, words and symbols to realize the motion control of one or more mechanical devices, it usually controls the mechanical quantity and switching quantity such as position, angle and speed.


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