[ROCTECH-Vicky]

The difference between Stepper Motor and Servo Motor ROCTECH MACHINERY

First, the control of different precision servo motor than the stepper motor
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Second, the low-frequency characteristics of the different, the stepper motor at low speeds prone to low frequency vibration phenomena AC servo motor is running very smoothly, even at low vibration phenomenon does not appear
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Third, the stepping motor output speed is below the servo motor, stepper motor speed is unstable, 300-600 floating servomotor constant force output, 2000, or 3000,. Stepper motor output torque decreases with increasing speed, and the sharp decline at high speed, so its maximum operating speed is generally 300 ~ 600RPM. AC servo motor for constant torque output, which at its rated speed (3000RPM to 2000RPM or general) or less, can be rated output torque above the rated speed for the constant power output.




Fourth, generally do not have a stepper motor overload. AC servo motors with strong overload.


Five different operating performance (servo motor does not appear lost step or overshoot phenomenon, high stability) of the internal structure of the position and velocity loops, generally not lose steps of the stepper motor or overshoot phenomenon, control performance and more is reliable.


Six different performance speed response (high starting acceleration performance)
Stepper motor to accelerate from standstill to operating speed (typically several hundred revolutions per minute) need 200 to 400 milliseconds. Better acceleration performance AC servo system to Panasonic MSMA 400W AC servo motor, for example, accelerates from zero to its rated speed 3000RPM only a few milliseconds, can be used to control applications that require fast start-stop.


VII. In summary, the servo system performance in many respects superior to the stepper motor.