The closed-loop stepper series perfectly integrates servo control technology into digital stepper drive technology, employing the typical three-loop control method of current loop, velocity loop, and position loop. Based on feedback encoder, the space vector current control algorithm and vector smoothing filter technology effectively suppress the ‘low-frequency resonance’ that troubles traditional steppers, allowing the motor to run smoothly and quietly even at low speeds. It perfectly solves the low-speed vibration and noise issues of traditional stepper motors. Suitable for various small and medium-sized automation equipment such as engraving machines, wire strippers, cutting machines, laser machines, plotters, CNC machine tools, automatic assembly equipment, electronic processing equipment, textile and garment equipment, etc. It performs particularly well in applications where users expect low noise and high speed.