1. Different principles: servo drive through the position of the motor, speed and torque closed-loop control, so as to achieve accurate positioning and control; Stepper motor drivers rotate at a fixed Angle by applying a pulse signal to the motor, so only relatively precise control can be achieved.
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2. Different control modes: the servo drive can be controlled in various modes such as speed ring, position ring and torque ring according to needs; However, the stepper motor driver can only carry out open-loop control, that is, the given pulse signal is directly transmitted to the motor, and accurate closed-loop control can not be achieved.
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3. Different dynamic response capabilities: the servo drive has a high dynamic response capability, which can achieve high-speed and high-precision positioning and adjustment in an instant; However, due to the limitation of the minimum step Angle and inertia, the response speed and accuracy of the stepper motor driver are low.
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4. Different range of application: servo drive is suitable for applications requiring high speed, high precision and high reliability, such as automated production lines, CNC equipment, etc. The stepper motor driver is suitable for some need simple control or low cost, but the positioning accuracy is not high or the load is easy.
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5. The cost is different: because the control algorithm and chip of the servo system are more complex, the price is relatively high; The stepper motor system has more advantages in cost because of its simplicity and cheap price.