MPL-B680B-M-X227  MP-Series Low-inertia Servo

There are significant differences between servo motors and stepper motors in several ways:

Control mode: The stepper motor controls the rotation Angle by controlling the number of pulses, that is, a pulse corresponds to a step Angle. The servo motor controls the rotation Angle by controlling the length of the pulse time.
Workflow: Stepper motors usually require two pulse signals, namely signal pulse and direction pulse, in order to start working. Servo motors are much simpler, requiring only a power switch.
Low frequency characteristics: When the stepper motor is running at low speed, it is prone to low frequency vibration. In order to avoid this phenomenon, it is usually necessary to use damping techniques or subdivision techniques. However, the servo motor is very smooth at low speed and does not vibrate.
Torque frequency characteristics: the output torque of the stepper motor will decrease with the increase of the speed, and will drop sharply at higher speed, so its maximum working speed is generally 300 ~ 600r/min. The servo motor has a constant torque output characteristic, that is, within the rated speed (generally 2000 or 3000r/min), the output rated torque, and above the rated speed is a constant power output.
Overload capacity: Stepper motors generally do not have overload capacity, while servo motors have strong overload capacity.
Accuracy and responsiveness: The accuracy of a stepper motor is generally superior to that of a servo motor because it does not accumulate errors. However, servo motors are superior to stepper motors in terms of responsiveness.
Dynamic response: The servo motor has better dynamic response and stability, which can quickly respond to external control signals and achieve accurate position and speed control. In contrast, the stepper motor is prone to vibration and shock during high-speed movement and acceleration and deceleration.
Application scenarios: Servo motors are suitable for applications requiring high accuracy, speed and response, such as robotics, CNC machining, etc. The stepper motor is suitable for low-cost, low-precision control occasions, such as printers, vending machines and so on.
In summary, there are obvious differences between servo motors and stepper motors in terms of control mode, workflow, low frequency characteristics, moment frequency characteristics, overload capacity, accuracy and responsiveness, dynamic response and application scenarios. Therefore, when choosing a motor, it is necessary to decide which type of motor to use according to the specific application needs.