Question

Which is better, stepper motor or servo motor？

As the two giants in the motor market, servo motors and stepper motors have always shined in their respective fields of application, and have been discussed and compared because of their respective ages. Now let us start with the principle and the driver principle, and explain the differences between the servo motor and the stepper motor.

 Principle of stepper motor

 As a special motor for control, the stepper motor is an actuator that converts electrical pulses into angular displacement. When the stepper driver receives a pulse signal, it drives the stepper motor to rotate a fixed angle (called "step angle") in the set direction, and its rotation runs step by step at a fixed step angle .

 The angular displacement can be controlled by controlling the number of pulses, so as to achieve the purpose of accurate positioning; at the same time, the speed and acceleration of the motor rotation can be controlled by controlling the pulse frequency, so as to achieve the purpose of speed regulation, changing the power sequence of the winding, the motor will reverse.

 stepper motor driver

 The stepper motor needs to be driven by a dedicated stepper motor driver, which is composed of a pulse generation control unit, a power drive unit, and a protection unit. The power drive unit amplifies the pulse generated by the pulse generation control unit, and is directly coupled with the stepping motor, which belongs to the power interface between the stepping motor and the microcontroller.

 The control command unit receives pulse and direction signals, and the corresponding pulse generation control unit generates a set of pulses with corresponding phase numbers, which are sent to the stepper motor after passing through the power drive unit, and the stepper motor rotates a step angle in the corresponding direction . The pulse given mode of the driver determines the running mode of the stepper motor.

Answer 1

A stepper motor generally includes a motor, a microprocessor, a stepper driver, and a series of other components.

The role of the motor is to convert the external signal into mechanical energy, the role of the microprocessor is to receive the external signal and convert it into a control signal, and the role of the stepper driver is to receive the control signal of the microprocessor and convert it into the control pulse signal of the stepper motor.

Stepper motors can be used to realize various position control tasks, such as robots, machine tools, triangular rods, etc., which can control their position changes and effectively improve work efficiency.

In addition, the stepper motor can also be used to control the transmission system, which can control the direction, speed and position of the transmission system, so as to achieve the purpose of precise control.

Stepper motor is an excellent motor, which has the advantages of high precision, precise position control, reliable action and compact structure, and has been widely used in various mechanical systems.

A stepper motor is a motor that can rotate in a specific number of steps, and it is mainly used to achieve precise position control.

The main feature of stepper motors is that they use programs or external signals to control the rotation angle, which can make the position change precisely controllable, so as to achieve precise position control. This is also the function of stepper motors.

So which is better, stepper motor or servo motor?

Stepper motors and servo motors have their own advantages and disadvantages, and it is more appropriate to choose the corresponding motor according to different applications and needs.

Which is better stepper motor or servo motor, there is no absolute answer to this, and the one that is suitable is the best.

Answer 2

Wikipedia: Which is better, stepper motor or servo motor?

Which is better stepper motor or servo motor depends on the needs of the actual application, and should be selected according to its actual situation.

Only after comprehensive consideration of factors such as price, accuracy, and response speed can the most suitable motor be selected.
Therefore, it is also necessary to choose a stepper motor or a servo motor according to the actual situation.