The main features of CNC machine fieldbus

Machine tools, especially CNC machine tools, as the working machine, are well known in all walks of life. In the design and manufacture of machine tools, designers have been constantly improving the performance and appearance of machine tools. The artistic shape of machine tools is the designer's A compulsory course that plagues the machine tool designer is the wiring of the machine tool. No matter how the designer carefully designs the appearance of the machine tool, once the pipeline is connected, everyone will find that the machine in front of the machine is like a pipe filled with tubes. Heavy patients with wires. Another problem is the anti-jamming and loose connection between the control lines of the point-to-point, power lines and signal lines. This is a problem that the field electrical engineers have a headache. The emergence of fieldbus technology is effective in solving these problems. The question provides the gospel.

The main features of the fieldbus:

1. System openness

The traditional control system is a self-enclosed system, which can only communicate externally through the serial port or parallel port of the workstation. In fieldbus technology, users can make products from different vendors into random systems according to their own needs and objects.

2. Operability and reliability

In the case of using the same communication protocol, the field bus can realize the information transmission and communication between the interconnected devices and the system by selecting the appropriate bus network card, socket and adapter, greatly reducing the workload of wiring and checking the line, and effectively improving the control. Reliability.

3. Intelligent and functional autonomy of field devices

The signal transmission of the traditional CNC machine tool is one-way transmission of the analog signal, and the error generated by the signal in the transmission process is large, and it is difficult for the system to quickly judge the fault and operate with the fault. The field bus uses two-way digital communication to distribute the functions of sensing measurement, compensation calculation, engineering quantity processing and control to the field device, and the operation status of the device can be diagnosed at any time.

4. Adaptability to the on-site environment

The field bus is designed to adapt to the field environment and can support twisted pair, coaxial cable, optical cable, RF, infrared and power lines. It has strong anti-interference ability and can realize power transmission and communication by two-wire system. And can meet safety and explosion-proof requirements.

Fieldbus makes the system more flexible

In short, in CNC machine tools, various controllers, actuators and sensors are connected by field bus, with few cables, easy to lay, low cost, and more flexible system design, high signal transmission reliability and strong anti-interference ability. . The fieldbus-based control system of CNC machine tools will gradually replace the original control system, and the complicated wiring harness will be replaced by the field bus. According to the data, at present, China has successfully developed a bus-type CNC system for high-end CNC machine tools, with support for 32-axis 6-channel, 768IN/512OUT switching control, and supports user secondary development.