Why Servo Motor is Most suitable for Robotics Applications?

In robotics applications, the most usable motor is Servo Motor. Stepper Motor also used in robotics applications but servo motors are widely used because of their good speed and torque characteristics. In this article, we are going to know why servo motor is most suitable for robotics applications.

In a Robot or any robotics products, very precise motor speed control is needed. Generally, in such applications, angle precise rotation is needed.

Suppose, a motor is connected in a robot for movement its arms or hands. So if the motor is rotating more than the requirement, the robot cannot be work properly.

Servo motor always works in a closed-loop system. A regular motor(AC or DC motor) always rotate in 360 degrees but servo motor can rotate in 0 to 180 degree.

By applying the PWM signals we can control the direction and degree of the rotation of the motor. Here in the below figure you can see how we can control the degree of the rotation of the motor by increasing or decreasing the width or duty cycle of the pulse.

Here you can see in the above figure, with increasing the width of the input pulse, the rotational angle also increases but remember it does not exceed the 180 degrees.

Servo Motor has the following characteristics for which it is most suitable for robotic applications,

1. It can provide very high torque.

2. High-Speed operation is possible.

3. It can drive heavy load also.

4. It shows very good performance during the frequently ON/OFF operation.

5. Servo motor has a feedback system and works in a closed-loop system that is why it can be controlled very accurately and precisely.

6. Servo motor very lighter in weight and smaller in size that is why it can install any small place easily.


Robot or any robotic device are designed in such a way that they must be able to different types of tasks. For example, a robot is designed to move an object from one place to another place. So in this case, accurate direction, speed, rotation, enough torque are needed. We can fulfill those requirements using stepper motors in a robot.




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