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NEMA 34 Closed Loop Stepper Motor

A NEMA 34 closed loop stepper motor is a type of stepper motor equipped with a feedback mechanism that continuously monitors its position. It combines the benefits of both stepper motors and closed loop control systems, offering precise and reliable motion control. The NEMA 34 designation refers to the motor's standardized dimensions defined by the National Electrical Manufacturers Association (NEMA).
  • NEMA 34

  • CS

  • 8501109990

  • 86MM*86MM

  • 2

  • 3.8~6A


  • 76~150

  • 1.5~2.4

  • 1.8

  • -20℃~+50℃


Nema 34 Closed Loop Stepper Motor 


A NEMA 34 closed loop stepper motor is a powerful and advanced motor that combines the benefits of both stepper motors and servo motors. It offers precise positioning and high torque control, making it an ideal choice for various applications in industries such as automation, robotics, and manufacturing.

NEMA 34 Stepper Motor 86mm Closed Stepper Motor

Model: NEMA34, 86H

Phase: 2phase 

Stepper Angle: 1.8º

Low Current

High Holding Torque

Speed: low or high speed

Shape: Square

Features of NEMA 34 Closed Loop Stepper Motor:

● High Torque Capability

NEMA 34 closed loop stepper motors are designed to deliver high torque, allowing them to handle demanding tasks and maintain stability even under heavy loads. 

● Precise Positioning

 With the integration of feedback systems, NEMA 23 closed loop stepper motors can achieve precise positioning accuracy, ensuring that the motor reaches the desired position accurately.

● Improved Accuracy

The closed loop control loop minimizes position errors and eliminates the risk of missed steps, resulting in improved overall accuracy of the system.

● Reduction in Motor Heating

Closed loop stepper motors operate more efficiently than open-loop motors, resulting in reduced motor heating. This feature not only prolongs the motor's lifespan but also improves its performance.

● Enhanced Performance at High Speeds


NEMA 23 closed loop stepper motors are capable of maintaining their performance even at high speeds, making them suitable for applications that require rapid movements.

● Compatibility with Various Control Systems

These motors can be easily integrated into different control systems, making them versatile and adaptable to a wide range of applications.

NEMA 34 Closed Loop Stepper Motor Paramaters:

Step Angle----------------------------- 1.8°±5%

Temperature Rise-------------------------- 80℃ Max.

Insulation Resistant-------- 100MΩ Min.,500VDC

Dielectric Strength-------- 500VAC for one minute

Ambient Temperature ---------- —20℃~+50℃

Shaft Radial Play------------------------------- 0.02Max.(450 g-load)

NEMA 34 Closed Loop Stepper Motor Technical Specifications:


No.of phase

Step angle ±5%°)









Holding Torque 




































NEMA 34 Closed Loop Stepper Motor Size:

NEMA34 Closed Loop Stepper Motor

Installation and Wiring Guidelines

Proper installation and wiring are crucial for the optimal performance of NEMA 23 closed loop stepper motors. Follow these guidelines for successful installation:

1. Mount the motor securely using appropriate brackets or mounts to prevent vibrations and ensure stability.

2. Pay attention to the wiring connections. Follow the manufacturer's instructions and ensure correct wiring for power supply, encoder/resolver, and control signals.

3. Use shielded cables for wiring to minimize electrical interference.

4. Properly ground the motor and the control system to reduce the risk of electrical noise.

How to Select the Right NEMA 34 Closed Loop Stepper Motor

When choosing a NEMA 34 closed loop stepper motor for your application, several factors need to be considered:

1. Torque Requirements

Determine the torque needed to drive your load accurately. Consider factors such as acceleration, deceleration, and operating conditions.

2. Step Resolution

Choose a motor with the appropriate step resolution to achieve the desired level of precision in your application.

3. Operating Voltage

Ensure that the motor's operating voltage is compatible with your power supply system to avoid any compatibility issues.

4. Environmental Considerations

Take into account the operating temperature range, dust, and moisture resistance requirements of your application.

5. Integration and Compatibility

Consider the compatibility of the motor with your control system, software, and other components in your setup.

6. Budgetary Constraints

Evaluate the cost-effectiveness of the motor, balancing performance requirements with your budget limitations.

By carefully considering these factors, you can select the right NEMA 34 closed loop stepper motor that meets your specific application requirements.

Installation and Wiring

Proper installation and wiring are crucial for the optimal performance of NEMA 34 closed loop stepper motors. Follow these general steps:

1. Mounting

Securely mount the motor using appropriate brackets or mounts to minimize vibrations and ensure stability.

2. Power Supply

Connect the motor to a suitable power supply, adhering to the recommended voltage and current ratings.

3. Wiring

Connect the motor to the controller using shielded cables to minimize electrical noise interference.

4. Encoder Wiring

Connect the encoder cables to the appropriate ports on the controller, ensuring correct signal routing.

5. Controller Configuration

Configure the controller software or settings to recognize and communicate with the closed loop stepper motor.

It's essential to refer to the manufacturer's instructions and guidelines for specific installation and wiring procedures for your NEMA 34 closed loop stepper motor model.

Applications of NEMA 34 Closed Loop Stepper Motors

NEMA 34 closed loop stepper motors find applications in various industries where precision and control are essential. Some common applications include:

CNC Machinery: 

Closed loop stepper motors are widely used in computer numerical control (CNC) machines for precise and automated movement of cutting tools, spindles, and other components.

3D Printing: 

The high accuracy and torque control of NEMA 34 closed loop stepper motors make them ideal for 3D printers, ensuring precise layer-by-layer printing.


Closed loop stepper motors play a crucial role in robotic systems, providing accurate positioning and motion control for robotic arms, joints, and grippers.

Textile Machinery: 

NEMA 34 closed loop stepper motors are utilized in textile machines for controlling yarn feed, fabric tension, and other critical processes.

Automation Equipment: 

These motors are used in various automated systems such as packaging machines, conveyor systems, and assembly lines, where precise movement and control are vital.

Comparison with Open Loop Stepper Motors

While open loop stepper motors are widely used, closed loop stepper motors offer distinct advantages. Here's a brief comparison:

● Control Accuracy: Closed loop motors provide higher accuracy due to the feedback mechanism, while open loop motors rely on assumptions and may experience positioning errors.

● Dynamic Performance: Closed loop motors excel in dynamic applications with changing loads or environmental conditions, as they continuously adjust to maintain accuracy, whereas open loop motors may struggle in such scenarios.

● Torque Control: Closed loop motors offer better torque control, ensuring smoother and more controlled motion compared to open loop motors.

● Cost: Closed loop stepper motors are generally more expensive than open loop motors due to the additional components required for closed loop control.

● Application Considerations: Open loop motors are suitable for applications where cost is a significant factor, and high precision is not critical. Closed loop motors are preferred in applications that demand precise positioning and dynamic control.

Consider the specific requirements of your application to determine whether a closed loop or open loop stepper motor is the right choice.

Future Trends and Developments

As technology continues to advance, we can expect further improvements in closed loop stepper motors. Some potential future trends and developments include:

1. Miniaturization: The development of smaller and more compact closed loop stepper motors to cater to applications with space constraints.

2. Improved Efficiency: Efforts to enhance the energy efficiency of closed loop motors to reduce power consumption and heat generation.

3. Advanced Control Algorithms: Continued research into advanced control algorithms to further enhance the accuracy and performance of closed loop stepper motors.

4. Integration with Industry 4.0: Integration of closed loop stepper motors with Industry 4.0 technologies such as Internet of Things (IoT) connectivity, enabling remote monitoring, control, and predictive maintenance capabilities.

5. Customization and Flexibility: The ability to customize closed loop stepper motors based on specific application requirements, allowing for greater flexibility in meeting diverse industrial needs.

As technology progresses, these advancements in closed loop stepper motors will continue to drive precision, reliability, and efficiency in motion control applications.

FAQs for NEMA 34 Closed Loop Stepper Motor: 

1. What is the difference between a closed loop and open loop stepper motor?

A closed loop stepper motor utilizes a feedback mechanism to continuously monitor its position and adjust accordingly, providing increased accuracy. In contrast, an open loop stepper motor operates based on assumed position, without feedback, and may be more prone to positioning errors.

2. Can a closed loop stepper motor provide higher torque compared to an open loop stepper motor?

Yes, closed loop stepper motors generally offer better torque control compared to open loop stepper motors. The feedback mechanism in closed loop motors allows for precise control and smoother motion, resulting in improved torque performance.

3. Are NEMA 34 closed loop stepper motors suitable for high-speed applications?

Yes, NEMA 34 closed loop stepper motors are capable of high-speed applications. However, it is essential to consider factors such as motor specifications, load requirements, and system dynamics to ensure optimal performance at high speeds.

4. How do I determine the appropriate current setting for my closed loop stepper motor?

The appropriate current setting for a closed loop stepper motor depends on factors such as motor specifications, load requirements, and desired performance. Consult the motor's datasheet or seek guidance from the manufacturer to determine the optimal current setting for your specific application.

5. Can I upgrade my existing open loop stepper motor system to a closed loop system?

In most cases, it is possible to upgrade an existing open loop stepper motor system to a closed loop system. However, it may involve replacing certain components such as the motor, adding an encoder for feedback, and reconfiguring the control system. It is recommended to consult with a qualified technician or the manufacturer to assess the feasibility and compatibility of such an upgrade.

FAQs for the factory :

1. Are you a manufacturer?

Yes, we are manufacturer, and we produce Stepper Motor& Stepper Motor Driver,  Switching Power supply, Short Cycle Press Line and other automatic machines.

2. How to select models?

Before purchasing, please contact us to confirm model No. and drawings to avoid any misunderstanding.

3. Do you offer OEM & ODM service? 

Yes.We can supply OEM&ODM and make customized design for any specific application.

4. How can we know the product quality?

We suggest you ording a sample. And you can also send us email with detailed photos and specifications for checking if you cannot get enough information in the product page.

5. What's the delivery time?

Except special order.For samples usually 10-14 working days .For batch order .Usually 17-25days. For Stock motors usually 1~2 days.

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