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Home / Products Centre / Stepper Motor / Closed Loop Stepper Motor

Closed Loop Stepper Motor

What is a Closed Loop Stepper Motor?

A closed loop stepper motor combines the basic working principle of a stepper motor with a feedback system. Unlike traditional open-loop stepper motors, which operate without feedback and rely on constant power pulses to determine position and speed, a closed loop stepper motor uses an encoder or a similar feedback device to continuously monitor and adjust its operation. The feedback system ensures the motor's position, speed, and performance are accurately regulated, even under varying loads and conditions.

 

BesFoc Closed Loop Stepper Motors

The Besfoc motor has an optical or magnetic encoder stepper motor with a resolution of 1000 lines or 1024 lines. The high-precision anti-interference is suitable for dust, dirt, and oil-stained environments, and realizes simple closed-loop control. Sizes include Nema11, Nema17, Nema23, Nema24 and Nema34.

NEMA 11 28HSN

NEMA 11 28HSN Closed Loop Stepper Motor

Stepper motor, small size, high torque, low noise, step angle: 1.8°, NEMA11, 28x28mm
Optional: Connectors, gearboxes, encoders, brakes ......
Model Step Angle Phase Shaft Type Body Length Current Resistance Inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / (L) mm A Ω mH N.cm No. g.cm2 Kg
BF28HSN006 1.8 2 Round 32 0.67 5.6 3.4 6 4 9 0.11
BF28HSN009 1.8 2 Round 45 0.67 6.8 4.9 9.5 4 12 0.14
BF28HSN012 1.8 2 Round 51 0.67 9.2 7.2 12 4 18 0.2
NEMA 17 Closed Loop Stepper Motor

NEMA 17 42HSN Closed Loop Stepper Motor

Stepper motor, small size, high torque, low noise, step angle: 1.8°, NEMA17, 42x42mm
Optional: Connectors, gearboxes, encoders, brakes ......
Model Step Angle Phase Shaft Type Body Length Current Resistance Inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / (L)mm A Ω mH N.cm No. g.cm2 Kg
BF42HSN05 1.8 2 Round 48 1.68 1.65 2.8 44 4 68 0.35
BF42HSN07 1.8 2 Round 60 1.7 3 6.2 7.3 4 102 0.55
NEMA 23 Closed Loop Stepper Motor

NEMA 23 57HSN Closed Loop Stepper Motor

Stepper motor, high torque, low noise, smooth type, step angle: 1.8° NEMA23, 57x57mm
Optional: Connectors, gearboxes, encoders, brakes ......
Model Step Angle Phase Shaft Type Body Length Current Resistance Inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / (L)mm A Ω mH Nm No. g.cm2 Kg
BF57HSN12 1.8 2 D-cut 56 4.2 0.4 1.5 1.2 4 280 0.68
BF57HSN21 1.8 2 D-cut 76 4.2 0.6 2 2.1 4 440 1.1
BF57HSN30 1.8 2 D-cut 112 4.2 0.9 4 3 4 800 1.4
NEMA 24 Closed Loop Stepper Motor

NEMA 24 60HSN Closed Loop Stepper Motor

Stepper motor, high torque, low noise, smooth type, step angle: 1.8°, NEMA24, 60x60mm
Optional: Connectors, gearboxes, encoders, brakes ......
Model Step Angle Phase Shaft Type Body Length Current Resistance Inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / (L)mm A Ω mH N.cm No. g.cm2 Kg
BF60HSN30 1.8 2 D-cut 100 4 0.65 2.4 3 4 980 1.7
BF60HSN40 1.8 2 D-cut 111 4 0.7 2 4 4 1120 1.9
NEMA 34 Closed Loop Stepper Motor

NEMA 34 86HSN Closed Loop Stepper Motor

Stepper motor, low rotor inertia, large torque, fast acceleration, step angle: 1.8°, NEMA34, 86x86mm
Optional: Connectors, gearboxes, encoders, brakes ......
Model Step Angle Phase Shaft Type Body Length Current Resistance inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / (L)mm A Ω mH Nm No. g.cm2 Kg
BF86HSN45 1.8 2 Key 78 6.0 0.27 2 4.5 4 1400 2.3
BF86HSN65 1.8 2 Key 100 6.0 0.27 2.2 6.8 4 2200 3
BF86HSN85 1.8 2 Key 115 6.0 0.36 3.8 8.5 4 2700 4.2
BF86HSN120 1.8 2 Key 155 6.0 0.44 3.8 12.0 4 4000 5.5

How Does a Closed Loop Stepper Motor Work?

The working principle of a closed loop stepper motor is built around the integration of feedback mechanisms, most often using an encoder that continuously monitors the position of the rotor. Here’s a step-by-step breakdown of how it functions:

1. Initial Input Signal: 

The controller sends a pulse or command that instructs the motor to move to a certain position or rotate at a specified speed.

2. Motor Movement: 

The stepper motor moves incrementally, taking small steps corresponding to the pulse signals received from the controller. In traditional open-loop systems, the motor moves without feedback.

3. Feedback via Encoder: 

As the motor moves, an encoder or position sensor monitors the rotor’s position. This feedback is sent back to the controller, providing real-time data about the motor’s actual position.

4. Adjustment of Current: 

If the feedback data shows any discrepancy between the desired and actual position (due to load changes or external factors), the controller adjusts the current supplied to the motor to correct the error.

5. Continuous Monitoring and Correction: 

This feedback loop is continuous, ensuring that the motor always operates within its optimal range, even if conditions change.

The key difference between closed loop and open loop stepper motors is the feedback system, which allows for constant adjustments to ensure precision, stability, and efficiency.

 

Key Features of Closed Loop Stepper Motors

1. High Precision Control: 

The motor’s feedback system ensures that the motor responds accurately to input commands, correcting errors like missed steps or position shifts that can occur in open-loop systems.

2. Enhanced Efficiency: 

Closed loop systems adjust power consumption based on load requirements, reducing wasted energy and improving overall efficiency.

3. Reduced Heat Generation: 

Since the motor uses feedback to adjust power, it generates less heat compared to open-loop motors, which constantly consume power even when not necessary.

4. Low Noise and Vibration: 

By maintaining constant monitoring and adjustment, closed loop stepper motors operate more smoothly, generating less noise and vibration than their open-loop counterparts.
 

Advantages of Closed Loop Stepper Motors

1. Increased Accuracy and Precision

Closed loop stepper motors significantly improve position accuracy. They continuously adjust and correct any errors, ensuring the motor reaches its exact position without missing steps. This makes them ideal for applications where high precision is critical.

2. Greater Torque at Higher Speeds

Closed loop stepper motors provide higher torque, especially at higher speeds, compared to open-loop systems. The feedback system dynamically adjusts the motor’s power to ensure consistent performance, even when speed or load fluctuates.

3. Reduced Power Consumption

Traditional stepper motors run at full power all the time, whether the motor is under load or not. Closed loop systems only draw the power they need, significantly improving energy efficiency, especially in situations where the motor is lightly loaded.

4. Lower Heat Generation

As a result of more efficient power usage, closed loop stepper motors generate less heat than open-loop systems. This reduces the need for complex cooling mechanisms and extends the life of the motor and associated components.

5. Quieter Operation

The smoother operation of closed loop stepper motors results in reduced noise and vibration. This is particularly beneficial in environments where noise levels must be kept to a minimum, such as in medical or research equipment.

 

Applications of Closed Loop Stepper Motors

1. Robotics

2. CNC Machines and 3D Printers

3. Medical Equipment

4. Industrial Automation

5. Aerospace and Defense

FAQs of Customized Linear Stepper Motor

1. What is a linear stepper motor and how does it differ from a rotary stepper motor?

A linear stepper motor converts electrical pulses into precise straight line motion rather than rotational motion, useful for direct linear positioning without additional mechanical transmission.

 

2. What types of linear stepper motors does Besfoc offer?

Besfoc provides external T-type linear stepper motors, external ball screw linear stepper motors, non-captive linear stepper motors and captive linear stepper motors.

 

3. What are the main advantages of a linear stepper motor for automation applications?

Linear stepper motors deliver precision and accuracy, repeatability, simple control and low maintenance making them ideal for automation, robotics and medical equipment.

 

4. How does an external ball screw linear stepper motor improve motion performance?

A linear stepper motor with a ball screw reduces friction and increases load capacity, providing smooth and precise linear movement especially in high load tasks.

 

5. What customization options are available through OEM ODM Customized services for linear stepper motors?

Besfoc can tailor screw leads, stroke length, frame sizes, nut types, mounting features, encoder options, cable connectors and more based on customer requirements.

 

6. Can Besfoc design a linear stepper motor to match specific load and speed requirements?

Yes OEM ODM Customized services allow Besfoc to adjust motor parameters such as torque, lead screw pitch and stroke to suit particular load and speed profiles.

 

7. Why choose a linear stepper motor with ball screw over a lead screw version?

Ball screw versions offer lower friction, smoother motion and higher efficiency with better precision and longevity compared to lead screw mechanisms.

 

8. Are encoders available as part of the customization for linear stepper motors?

Yes Besfoc can integrate encoders for precise position feedback to improve motion control and allow closed-loop control if required.

 

9. What NEMA frame sizes are offered for Besfoc linear stepper motors?

Linear stepper motors are offered in a range of NEMA sizes including 8, 11, 14, 17, 23, 24 and 34 for different application scales.

 

10. How does the captive linear stepper motor design benefit high-precision applications?

Captive linear stepper motors have a fixed nut assembly that ensures backlash minimization and consistent linear motion required for high accuracy.

 

11. Can Besfoc linear stepper motors be customized for cleanroom or harsh environments?

Yes with OEM ODM Customized services Besfoc can adapt motor materials, seals and finishes for cleanroom compatibility or harsh industrial conditions.

 

12. How does a non-captive linear stepper motor offer flexibility compared to captive designs?

Non-captive linear motors allow the nut to move freely, offering flexible mounting and motion configurations for custom system layouts.

 

13. What industries benefit most from linear stepper motor solutions?

Industries such as automation, medical equipment, semiconductor manufacturing, 3D printing and optical equipment use linear stepper motors for precise motion control.

 

14. Are cable, lead and connector customizations available for Besfoc linear stepper motors?

Yes customers can request custom cables, leads and connector types to match their equipment wiring standards as part of OEM ODM Customized service.

 

15. How does Besfoc ensure durability in high-performance linear stepper motors?

High quality leadscrews, nuts, optimized stator geometry and premium magnets are used to enhance durability, force output and reliability.

 

16. Can Besfoc linear stepper motors include built-in drive electronics?

Through OEM ODM Customized services Besfoc can integrate drive electronics, creating a ready-to-install actuator with simplified wiring.

 

17. How quickly can Besfoc deliver customized linear stepper motor samples?

Besfoc offers competitive sample lead times, often within about a week, to support rapid development and testing.

 

18. What technical support does Besfoc provide for linear stepper motor integration?

Besfoc provides application guidance, wiring advice, integration support and performance optimization assistance for customized linear motors.

 

19. How does customization of screw lead and stroke improve performance?

Tailoring screw lead and stroke ensures the motor meets specific travel distance, speed, resolution and force requirements for precise actuation tasks.

 

20. Why is OEM ODM Customized service valuable when selecting a linear stepper motor?

OEM ODM Customized service allows motors to be precisely matched to system requirements reducing integration cost, improving performance and ensuring best fit for the application.

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