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Closed-Loop Stepper Servo Motors: Revolutionizing Accuracy in Motion

Discover the Benefits of Closed-Loop Stepper Servo Motors

In the world of motion control and automation, precision, reliability, and efficiency are paramount. As industries continue to advance, the need for advanced solutions that can meet the demands of complex applications has never been greater. One such solution that has been gaining popularity is the closed-loop stepper servo motor. These motors are designed to offer better control, higher efficiency, and greater precision compared to traditional open-loop stepper motors.

Our closed-loop stepper servo motors represent the cutting-edge of motion control technology, offering significant advantages over conventional systems. In this, we will explore the benefits, features, and applications of closed-loop stepper servo motors. We’ll also explain why RBA Optisync Private Limited is the ideal partner for your motion control needs.

What Are Closed-Loop Stepper Servo Motors?

A closed-loop stepper servo motor is a type of stepper motor that integrates a feedback loop, typically using an encoder, to monitor the position and performance of the motor. Unlike traditional open-loop stepper motors, which operate without feedback, closed-loop motors continuously measure their performance and adjust accordingly, making them much more accurate, efficient, and reliable.

Key Features of Closed-Loop Stepper Servo Motors:

  • Feedback Mechanism: The motor is equipped with an encoder that sends real-time data about the motor’s position, speed, and torque back to the controller. This enables the system to adjust motor commands based on feedback, ensuring high precision.
  • Higher Efficiency: By using real-time feedback to adjust motor operations, closed-loop stepper motors consume less power and generate less heat, improving overall system efficiency.
  • Improved Accuracy: The integration of the feedback system allows for continuous monitoring, which helps eliminate errors and increases the accuracy of the motor’s movements. This is particularly useful for applications requiring high precision.
  • Reduced Heat Generation: Traditional stepper motors often overheat because they run at full power continuously. Closed-loop stepper servo motors only draw the power needed for the specific task, reducing the generation of heat and increasing longevity.
  • No Loss of Steps: The feedback system in closed-loop stepper motors ensures that the motor never loses steps, which is a common issue in open-loop stepper systems, especially under heavy load conditions.

Advantages of Closed-Loop Stepper Servo Motors

Enhanced Precision and Control

One of the primary benefits of closed-loop stepper servo motors is the enhanced precision they offer. Traditional stepper motors can sometimes struggle with accuracy, especially when operating under varying loads or in complex motion systems. By incorporating feedback from an encoder, closed-loop motors continuously adjust their position, speed, and torque, ensuring the motor performs with consistent accuracy.

Increased Efficiency and Energy Savings

Unlike open-loop stepper motors that always run at full power, closed-loop stepper motors only use the necessary amount of power based on the load and speed required. This dynamic power adjustment helps save energy and reduces power consumption, making closed-loop stepper motors more efficient than their open-loop counterparts.

Furthermore, because these motors don’t run at full power when it’s not needed, they produce less heat, which leads to less wear and tear on the motor, contributing to longer operational life.

Better Torque Performance

Closed-loop stepper servo motors provide better torque performance, especially at higher speeds. Traditional stepper motors often lose torque as they increase in speed, which can lead to performance issues. The closed-loop design ensures that the motor can maintain its torque at higher speeds, making it ideal for high-speed applications that require consistent and reliable performance.

Reduced Heat Generation

Overheating is a common problem in traditional stepper motors, which often run at full power regardless of the load. This constant power consumption leads to excess heat generation, which can cause damage to the motor and surrounding components.

Cost-Effective Solution

While closed-loop stepper servo motors tend to be more expensive than open-loop systems, they can be more cost-effective in the long run. Their higher efficiency, reduced power consumption, and improved reliability lead to lower operational and maintenance costs over time.

Models of Closed-Loop Stepper Servo Motors

At RBA Optisync Private Limited, we offer a range of closed-loop stepper servo motors to suit various applications. Below are three of our top models:


57AM23ED
Parameter Specification
Step Angle 1.8°
Holding Torque 2.3 N.m
Rated Current 5.0 A
Resistance/Phase 0.6 Ω
Inductance/Phase 2.4 mH
Rotor Inertia 460 g.cm²
Shaft Diameter 8 mm
Shaft Length 22 mm
Length 98 mm
Weight 1.2 Kg

The 57AM23ED is a compact and high-performance motor that delivers excellent torque and accuracy for small-scale applications.


86AM45ED
Parameter Specification
Step Angle 1.8°
Holding Torque 4.5 N.m
Rated Current 6.0 A
Resistance/Phase 0.4 Ω
Inductance/Phase 2.8 mH
Rotor Inertia 1400 g.cm²
Shaft Diameter 14 mm
Shaft Length 40 mm
Length 105 mm
Weight 2.5 Kg

The 86AM45ED offers a higher torque rating than the 57AM23ED, making it suitable for medium-sized applications where more power is needed.


86AM85ED
Parameter Specification
Step Angle 1.8°
Holding Torque 8.5 N.m
Rated Current 6.0 A
Resistance/Phase 0.5 Ω
Inductance/Phase 5.5 mH
Rotor Inertia 2800 g.cm²
Shaft Diameter 14 mm
Shaft Length 40 mm
Length 140 mm
Weight 3.9 Kg

The 86AM85ED is a high-performance motor with the highest torque rating among the models listed.


Why Choose RBA Optisync Private Limited?

At RBA Optisync Private Limited, we specialize in providing top-tier motion control solutions that are tailored to meet the needs of various industries. Our closed-loop stepper servo motors are designed for precision, efficiency, and longevity, ensuring that your systems operate at peak performance. We offer a wide range of motors to suit different applications, and our team is dedicated to helping you find the perfect solution for your needs.

For more information about our closed-loop stepper servo motors, call us at +91 9662027058 or mail us at inquiry@rbautomate.com. Let us help you take your motion control systems to the next level.