DNC = direct numerical control. The system is like a unified whole to the user, the system of a variety of general physical and logical resources integration, can be dynamically assigned to any of the CNC machining tasks to any processing equipment. It is a powerful means to improve equipment utilization, reduce production costs, and is the future development trend of manufacturing.
In the direct digital control system, the computer through the multi-point circuit detection device for the process parameters sampling, and will be sampled and stored in the memory of the set value of the comparison of the formation of deviation signals, and then according to the pre-specified control algorithms to analyze and calculate the control signals generated by the system through the actuator to control the object controlled by the control.
Based on the functions and structural characteristics of computer control systems, computer control systems can be divided into:
(1) operation-guided control system;
(2) direct digital control system;
(3) computer supervisory control system;
(4) distributed control system;
(5) fieldbus control system.