himaxmotors

Semi-closed loop servo system is the mostly used system in CNC machine tool servo systems; Semi-closed loop servo system works the same with closed loop servo system, it similarly uses stepper motor as motor driver like closed loop servo system, you can use the pulse motor installed in encoder, brushless resolver or tachometer generator works as the position / speed detection device to form semi-closed loop position control system, The feedback signal of the system get from the system or screw on the motor shaft, Feeding system in the mechanical transmission device is outside the feedback loop, the nonlinear stiffness has not influence on the system stability, installation is more convenient for the operation. Machine tool’s positioning accuracy has relationship with the mechanical transmission precision. In the case of non-high precision transmission, compensation function can be used to improve the accuracy of the process satisfaction. Therefore, semi-closed loop servo system is widely used in CNC machine tools.