Synchronous serial bus type numerical control system

Abstract

The invention relates to a synchronous serial bus type numerical control system which comprises a display control terminal; numerical control software is stored in the display control terminal, whichis respectively connected with a machine tool operation station and a numerical control main case by serial ports and a synchronous serial bus, and realizes the movement control and the machine tool switching value control of the machine tool by communication management of the synchronous serial bus; the invention also comprises a machine tool operation station which is responsible for providing an operation instruction and operation state output to a display control terminal, and the numerical control main case which is an execution mechanism of the movement control and feedback detection function of the machine tool, converts the instruction at the display control terminal into a control signal of machine tool movement and respectively converts the movement and the state of the machine tool into a position signal and a switch value signal which are returned to the display control terminal by the synchronous serial bus. The numerical control system of the invention improves the anti-interference capability and the work stability of the system, and relieves the problem that the control signal is easy to be interfered; especially for the integrated control of a device with a plurality of machine tools, the system of the invention can conveniently carry out system transplantation, and has the characteristics of good generalization and low cost.

Description

technical field [0001] The invention relates to a computer numerical control system, in particular to a synchronous serial bus numerical control system for controlling various machine tools for mechanical processing, especially for large-scale and composite processing machine tools. Background technique [0002] In recent years, with the continuous progress of computer technology and communication technology, the numerical control system technology is experiencing the process of development from traditional closed to open numerical control system. The research and development of open numerical control system has been a hot topic at home and abroad. The open numerical control system is mainly based on the way of PC. Initially, the open system adopts the "PC embedded NC" structure. With the development of PC technology, "NC embedded in PC" structure appeared. [0003] Due to the wide application of serial bus technology in the field of industrial process control and the dev...

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Problems solved by technology

[0004] At present, a variety of field bus standards have been developed in the world. The main applications in the field of numerical control are SERCOS, PROFIBUS and industrial Ethernet. The main problem of the above-mentioned bus standards is that special transmission cables and special interface chips must be used. The electrical connection and data link layer are not open to users, the system integration is poor, the product cost is high, and the electrical wiring is inconvenient. Moreover, the related technologies and patents of the above three bus standards are in the hands of major foreign CNC equipment manufacturers, and their standards are adopted Need to pay high patent licensing fees and equipment testing fees, which will greatly increase product costs and reduce market competitiveness

At present, domestic CNC system manufacturers have not yet developed corresponding types of CNC products and formed corresponding bus standards.

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