The difference between servo motor and step motor,Why servo motor is more expensive than step motor?

When it comes to motion control systems, two types of motors are commonly used: servo motor and step motor. Both of these motors have their own unique characteristics and are suitable for different applications. However, servo motors are generally more expensive than step motors. In this article, we will explore the differences between these two types of motors and why servo motors are more expensive.

Servo Motor

A servo motor is a type of motor that is used for precise control of position, velocity, and acceleration. It is a closed-loop system that uses feedback to control the position of the motor shaft. The feedback can be obtained from an encoder or a resolver. The servo motor is designed to provide high torque at low speeds and high speeds at low torque. It is ideal for applications that require high precision and accuracy, such as robotics, CNC machines, and industrial automation.

Step Motor

A step motor is a type of motor that is used for open-loop control of position. It is a digital system that uses pulses to control the position of the motor shaft. The step motor is designed to provide high torque at low speeds and low torque at high speeds. It is ideal for applications that require low cost and simplicity, such as printers, scanners, and small robotics.

Difference Between Servo Motor and Step Motor

The main difference between servo motor and step motor is the control system. Servo motors use a closed-loop control system, while step motors use an open-loop control system. This means that servo motors are more precise and accurate than step motors. Servo motors can also provide higher torque at low speeds and higher speeds at low torque. Step motors, on the other hand, are less precise and accurate than servo motors. They can only provide high torque at low speeds and low torque at high speeds.

Why Servo Motor is More Expensive Than Step Motor?

Servo motors are more expensive than step motors because they are more precise and accurate. They use a closed-loop control system that provides feedback to control the position of the motor shaft. This feedback system requires additional components, such as encoders or resolvers, which increase the cost of the motor. Servo motors also require more complex control electronics, which further increases the cost.

In addition, servo motors are designed to provide high torque at low speeds and high speeds at low torque. This requires more advanced motor design and manufacturing techniques, which also increase the cost of the motor.

Conclusion

In summary, servo motors and step motors are two types of motors that are commonly used in motion control systems. Servo motors are more precise and accurate than step motors, which makes them ideal for applications that require high precision and accuracy. However, servo motors are more expensive than step motors because they require additional components and more complex control electronics. When choosing between servo motor and step motor, it is important to consider the specific requirements of the application and the budget.