Servo motors and stepper motors are two commonly used motors, many friends like to put them together for comparison, including accuracy, speed and other aspects of performance, then the servo motor and stepper motor which is high precision? What are the differences and differences between the two?

motor paso a paso

Stepper motor and AC servo motor stopping accuracy is basically the same (0.02 ~ 0.03), the accuracy depends on the mechanical accuracy, if you can complete a stopping position every 7.2 seconds, then according to the structure of the motor, it will always be positioned on the same small teeth as the rotor. This can further improve the stopping accuracy, and the stepper motor can generate the displacement angle according to the torque value of the load. In addition, depending on the mechanism conditions, a servo motor can have a wide swing width in response to gain adjustment.

Differences between stepper motors and servo motors.

1. Different control methods

Stepper motor is controlled by a pulse of CNC angle, a pulse corresponds to a stepping angle, but there is no feedback signal, so the motor does not know where it is, and the position accuracy is not high enough; servo motor will send out a corresponding number of pulses for each rotation angle. At the same time, the driver will receive the feedback signal and compare it with the pulse received by the servo motor, which can accurately control the rotation of the motor, thus realizing the positioning, and the accuracy can reach 0.001.
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2. Different workflow

AC servo motor has strong overload capability, taking stripped magnetic AC servo system as an example, it has the ability of speed overload and torque overload, and the upper torque is triple torque, which can be used to overcome the moment of inertia of inertial load at startup; stepper motor cannot work with stepper motor in some workplaces, because they do not have this overload capability.

3. Different speed

Los servomotores de CA tienen mejores prestaciones de aceleración que los motores paso a paso. En el caso de los servomotores de CA, por ejemplo, sólo se tarda unos milisegundos en acelerar desde la parada hasta la velocidad nominal de 3000 rpm, lo que puede utilizarse en puestos de control que requieren un arranque y una parada rápidos, así como una alta precisión de posición.

Of course, there are many kinds of motors and many different kinds of motors, not only in terms of stopping accuracy, but also in terms of workflow, control methods and many other aspects. For example, when choosing between a stepper motor and a servo motor, there are many levels to consider when choosing. After all, each motor type has its advantages and disadvantages, so it is important to avoid disadvantages when choosing, and need to consider the high cost, commissioning complexity and other issues.

Rotor del motor

Which is more accurate, servo motors or stepper motors? What are the differences and differences? I believe that after reading the above has been by the initial understanding, Vacuz hope that can help everyone!

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