CNC machine tool tools, computers, motors and dragging, dynamic control, detection and other automated equipment are automated equipment. The basic composition of CNC machine tools includes control medium, CNC device, servo system, feedback device and machine tool body.
1. Control medium
Control medium is a medium that storage CNC processing. Compared with the location information of the location of the workpiece, it records the processing program of the parts. The control medium refers to the information carrier that transmits the parts processing information to the CNC device. There are many forms of control medium. It is different from the types of CNC devices. The commonly used is perforation bands, perforation cards, tapes, disks, etc. With the development of CNC technology, the perforated belt and perforation card tend to eliminate, and use CAD/CAM software to program in computer, and then communicate with the CNC system through the computer. Essence
2. CNC device
CNC devices are the core of CNC machine tools, and people are metic as "central systems". Modern CNC machine tools use computer CNC. CNC devices include input devices and central processors (CPUs) and output devices. The composition of the CNC device can complete the input, storage, transformation, interpolation operation of the information, and implement various control functions.
3. Servo system
The servo system is the instruction of receiving CNC devices and driving components of the driving tool execution mechanism movement. Including the spindle driver unit, the feed drive unit, the spindle motor and the feed motor. When working, the servo system accepts the instruction information of the CNC system, and compares the requirements of the position and speed feedback signal in accordance with the requirements of the instruction information, drive the movement of the mobile component or execution part of the machine tool to process the parts that meet the requirements of the drawing.
4. Feedback device
The feedback device is composed of measurement elements and corresponding circuits. Its role is to detect speed and displacement, and return information back to constitute a closed -loop control. Some CNC machines with low accuracy requirements are called the opening system without feedback devices.
