HAYOUYI - Over 11 years of production experience in stepper motor, stepper driver, reducer and CNC engraving machine. CN
Language
HAYOUYI - Over 11 years of production experience in stepper motor, stepper driver, reducer and CNC engraving machine. CN
Different control methods.
Stepper motor controls the rotation angle by controlling the number of pulses, and one pulse corresponds to one step angle. Servo motor controls the rotation angle by controlling the length of pulse time.
Different low-frequency characteristics.
Stepper motors are prone to low-frequency vibration at low speeds. AC servo motors run very smoothly and will not vibrate even at low speeds.
AC servo systems have resonance suppression functions, which can cover the lack of mechanical rigidity, and the system has a frequency resolution function (FFT) inside, which can detect the resonance point of the machine and facilitate system adjustment.
Different torque-frequency characteristics.
The output torque of the stepper motor decreases as the speed increases, and it will drop sharply at higher speeds, so its maximum operating speed is generally 300-600r/min.
AC servo motors have constant torque output, that is, they can output rated torque within their rated speed (generally 2000 or 3000 r/min), and constant power output above the rated speed.
Different overload capacity.
Stepper motors generally do not have overload capacity.
AC servo motors have strong overload capacity.
Different speed response performance.
It takes 200 to 400 ms for a stepper motor to accelerate from standstill to the operating speed (generally several hundred revolutions per minute). The acceleration performance of the AC servo system is better. For example, the Panasonic MSMA400W AC servo motor accelerates from standstill to its rated speed of 3000 r/min. It only takes a few ms, which can be used in control situations that require fast start and stop.
