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Application of AC Servo motor in CNC Machine Tool

Time:2020-03-04 Views:341
NC technology is digital program control CNC machine to achieve automatic work technology. It is widely used in the field of machinery manufacturing and automation, better solve the multi-species, small batch and complex parts processing and production process automation. With the rapid development of computer and automatic control technology, numerical control technology has been widely used in CNC machine tools, robots and all kinds of mechanical and electrical integration equipment. At the same time, the rapid development of social economy, numerical control devices and CNC machinery requirements in theory and application of rapid development and improvement.
  Servo system is an important part of CNC machine tools, CNC machine tool accuracy and speed indicators are often determined by the servo system. With the development of technology, high-precision, high-performance AC servo servo system has become a new trend.
 1.  Overview for it :
    CNC lathes, also known as CNC lathes, that is, computer numerical control lathe, is currently the largest domestic use, the most extensive coverage of a CNC machine tools, generally by the input and output devices, numerical control devices, servo systems, testing feedback devices and machine tools, etc. composition. It is one of the main varieties of CNC machine tools to solve most of the mechanical parts of the automated processing problems become the most important mechanical processing equipment, CNC machine tools occupy a very important position, for decades has been the world‘s attention and get The rapid development.
    The servo drive system of the CNC machine is divided into two types: the closed loop and the open loop according to the presence or absence of the feedback detection unit. The basic composition of the two types of servo drive systems is not exactly the same. But no matter what type, the implementation of components and its drive control unit are essential. The effect of the drive control unit is to convert the feed command into the form of the signal required to drive the actuator, and the actuator converts the signal to the corresponding mechanical displacement. For closed-loop servo drive system, it is composed of actuators, drive control unit, comparison control link, feedback detection unit, and machine tools. The feedback detection unit feedbacks the actual position of the work table to the comparison control link, compares the command signal with the feedback signal, and uses the difference between the two as the following error of the servo system to drive the control unit, drives and controls the execution The element drives the table movement. In the CNC system, due to the introduction of the computer, the function of the comparison control function is completed by the software, which leads to some changes in the system structure, but basically consists of the implementation element, the feedback detection unit, the comparison control link, the driving control unit