The structure principle of CNC engraving and milling machine CNC system

Research of open CNC carving and milling machine of numerical control system ( oPenNu - riCContml，0NC) Solve frequent transformation is one of the main purpose of the demand and the contradiction between the closed control system, thus the establishment of a unified, the reconfigurable system platform, enhancement of the flexibility of the CNC system, reduce the difficulty of the development once again. The purpose of open is to make the NC controller is similar to today's compatible with PC, constructing systems in a unified, open platform, has a modular structure, according to the need for matching and integration, and allows the user to change or extend the functionality of system, in order to adapt to different requirements. For a long time, 0 NC produced three structure types: simple embedded PC technology in CNC system, the NC + PC type, belongs to the initial open CNC system, openness is restricted, such systems generally powerful, but complex, expensive; Using PC as the hardware platform of CNC system, composed of PC and open architecture motion controller, the PC + NC type, can fully guarantee the performance of the system, software versatility, flexible programming processing; SO Jia open nc system is a new open architecture, it provides to the user's largest selectivity and flexibility, it all CNC software installed in PC, and the hardware part is only between the PC and the servo drive and external L/O the standardization of common interface, users can in a variety of PC operating system platform, the use of open CNC kernel, the development of the needed functions, form various types of high performance nc system, compared with the former two kinds of nc system, S0 丌 type numerical control system has a high cost performance, thus has vitality, due to the complex huge system, mostly in the development stage at present. This machine adopts PC + NC CNC system. PC to PC, operated by the end user through the human-computer interaction interface control: NC USES is based on digital signal processor ( DsP) And the field programmable gate array ( n℃A) High solid GE300svPCI motion controller, for the next bit machine, engraving and milling machine CNC system principle block diagram base figure l in PC bus motion controller is the core of the whole control system, application instructions it receives from the upper machine, according to the movement pattern of set, complete the corresponding real-time motion planning and instructions to drive the corresponding movement. So will the openness and information processing ability of PC and motion controller of trajectory control organically unifies in together. Has a high degree of information processing ability, open, trajectory control accuracy and good generality characteristic, but also can make use of third party software resources to complete the user application development, the generated application instructions through the PC bus transmission to motion controller.