CNC system configuration and function selection！

CNC system configuration and function selection system is an important part of CNC machine tools, configure what kind of numerical control system and select which CNC functions are machine tool manufacturers and end users of the issues of concern.

     CNC system configuration Servo control unit selection The numerical control system position control mode
  
    Open-loop control system: the use of stepper motor drive components, there is no position and speed feedback devices, so simple control, low cost, but their load capacity, position control accuracy is poor, low feed rate, mainly for economic Type numerical control device;

    Semi-closed loop and closed loop position control system: DC or AC servo motor as the driving component, can be built in the motor within the pulse encoder, rotary transformer as a position / speed detection device to form a semi-closed loop position control system can also be installed directly In the workbench grating or induction synchronizer as a position detection device, to form a high-precision closed-loop position control system.

    Because of the pitch error, the amount of screw rotation angle feedback from the semi-closed loop system position detector can not accurately reflect the linear motion position of the feed axis. However, after the CNC system of pitch error compensation, they can achieve a very high position control accuracy. Compared with the full closed-loop system, their lower prices, installed in the motor position feedback device inside the seal is good, more stable and reliable, almost maintenance-free, it is widely used in various types of CNC machine tools.

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