What Is a Direct Numeric Control (DNC) System?
The direct numeric control (DNC) system is an online system for controlling various NC (numerical control) machine tools. Unlike traditional methods using floppy disks or USB ports, DNC enables direct operation of NC machine tools from a computer via a network connection, typically LAN, allowing for central management and operation of multiple NC machines.
Uses of Direct Numeric Control System
DNC systems facilitate the operation of multiple NC machine tools from a single computer, enabling data exchange between the computer and the machines. This system allows for the handling of large data volumes, long-term scheduled operations, and even unmanned operations, a significant advancement over conventional CNC machine tools. Additionally, it can acquire data from NC machines and transmit it back to the computer for monitoring and management.
Principle of Direct Numeric Control System
1. Data Transfer
Traditional CNC machine tools often rely on physical media like floppy disks or USB drives for data transfer, which can be time-consuming and limited in data capacity. DNC overcomes these limitations by networking the computer and NC machine tool for direct data transfer, eliminating the risk of manual input errors.
2. Network
The networking of DNC systems can be achieved using LAN or optical cables, connecting various devices like CAD/CAM computers, displays, and NC machines. For NC machine tools without network interfaces, a conversion adapter is used to connect LAN cables to the RS-232C ports of the machines. Additionally, wireless transmission to mobile devices can enable remote monitoring of machine operations.
Other Information on Direct Numeric Control System
1. Examples of Using the Direct Numeric Control System
DNC systems are used to monitor and manage the progress of NC machine operations from a DNC PC. This progress information can also be shared with other linked systems, allowing for comprehensive management of operations.
2. Advantages of Direct Numeric Control System
The increasing complexity and volume of NC data necessitate online transmission between equipment, and the DNC system meets this demand by allowing direct, high-speed data transfer from computers to machine tools. Benefits include the elimination of physical data storage like paper tapes and floppy disks, streamlined data management, and the ability to supply data directly from CAD/CAM systems to NC machine tools.