Machining center spindle encoder

　　1、 The Application of Encoders in Machine Tools

Since the emergence of CNC technology in the mid-20th century, CNC machine tools have brought revolutionary changes to the mechanical manufacturing industry. Numerical control machining machines have the following characteristics: good machining flexibility, high machining accuracy, high productivity, reduced labor intensity for operators, improved working conditions, and are conducive to the modernization of production management and the improvement of economic benefits. Numerical control machine tools are highly integrated electromechanical products. The development trends of CNC machine tools include high-speed, high-precision, composite, intelligent, open, networked, multi axis, and green.

　　2、 The development trend of CNC machine tools

1. High speed: With the rapid development of industries such as automobiles, national defense, aviation, and aerospace, as well as the application of new materials such as aluminum alloys, the demand for high-speed CNC machine tool processing is becoming increasingly high.

(1) Spindle speed: The machine tool adopts an electric spindle (built-in spindle motor), and the spindle speed can reach 200000 r/min;

(2) Feed rate: At a resolution of 0.01 μ m, a large feed rate of 240m/min can be achieved and precise machining of complex surfaces can be obtained;

2. High precision: The requirements for precision of CNC machine tools are no longer limited to static geometric accuracy. The motion accuracy, thermal deformation, and monitoring and compensation of vibration of machine tools are increasingly valued.

(1) Improving the control accuracy of CNC systems: high-speed interpolation technology is adopted to achieve continuous feed with small program segments, making the CNC control unit more refined. High resolution position detection devices are also used to improve the position detection accuracy (Japan has developed an AC servo motor with a built-in position detector of 106 pulses/revolution, which can achieve a position detection accuracy of 0.01 μ m/pulse). The position servo system adopts methods such as feedforward control and nonlinear control;

(2) Adopting error compensation technology: using techniques such as reverse clearance compensation, screw pitch error compensation, and tool error compensation to comprehensively compensate for the thermal deformation error and spatial error of the equipment

3. The meaning of functional composite machine tool refers to the process of processing multiple elements from raw materials to finished products on a single machine tool, or as much as possible. According to its structural characteristics, it can be divided into two types: process composite type and process composite type. Process composite machine tools such as boring milling drilling composite machining centers, turning milling composite turning centers, milling boring drilling turning composite composite machining centers, etc; Process composite machine tools such as multi-faceted multi axis linkage machining composite machine tools and dual spindle turning centers.

　　3、 Technical parameters

1. Delay: 00 (% F.S.)

2. Resolution: 1000000P/R

3. Maximum response frequency: 500KHZ

4. Maximum speed: 100000PRM

5. Output signal: Analog type

6. Maximum speed: 100000PRM

　　4、 Product application

1. Position detection and feedback of machine tools;

2. Measurement of motor and spindle speed and positioning;

3. Other special machine applications;

　　5、 Measurement principle

Magnetic induction encoder is based on magnets, integrating magnetic sensing components, designed as a magnetic induction non-contact sensing head to sense the number of teeth on gears, and processed into 1Vpp or TTL (RS422 Line Driver) through circuit correction or signal segmentation.