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Closed Loop Stepper Motor

What is a Closed Loop Stepper Motor?

A closed loop stepper motor integrates feedback mechanisms into the traditional stepper motor design. Unlike open-loop stepper motors, which operate solely on predetermined power pulses without real-time feedback, closed loop stepper motors incorporate an encoder or similar device to continuously track and adjust the motor's performance. This feedback allows for precise control over position and speed, even in varying load conditions, enhancing reliability and efficiency.

 

Jkongmotor Closed Loop Stepper Motors

The Jkongmotor closed loop stepper motors feature either optical or magnetic encoders, providing resolutions of 1000 lines or 1024 lines. Designed for high precision and anti-interference, these motors perform well in environments with dust, dirt, and oil contamination. They offer straightforward closed-loop control and are available in various NEMA sizes, including Nema 11, Nema 17, Nema 23, Nema 24, and Nema 34.

Features:

  • Size includes: 28 /35 /42 /57 /60 /86 /110 /130mm
  • Incremental encoder & Absolute encoder
  • Magnetic encoder & Optical encoder
  • Real-Time Feedback and Position Correction
  • Automatic Torque Control
  • High-Speed Performance Without Resonance
  • Position Holding with No Drift
  • Intelligent Error Detection and Alarms
  • Higher System Efficiency and Compact Design
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
JK28HSN006 1.8 2 Round 32 0.67 5.6 3.4 6 4 9 0.11
JK28HSN009 1.8 2 Round 45 0.67 6.8 4.9 9.5 4 12 0.14
JK28HSN012 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
JK42HSN05 1.8 2 Round 48 1.68 1.65 2.8 44 4 68 0.35
JK42HSN07 1.8 2 Round 60 1.7 3 6.2 73 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
JK57HSN12 1.8 2 D-cut 56 4.2 0.4 1.5 1.2 4 280 0.68
JK57HSN21 1.8 2 D-cut 76 4.2 0.6 2 2.1 4 440 1.1
JK57HSN30 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
JK60HSN30 1.8 2 D-cut 100 4 0.65 2.4 3 4 980 1.7
JK60HSN40 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
JK86HSN45 1.8 2 Key 78 6.0 0.27 2 4.5 4 1400 2.3
JK86HSN65 1.8 2 Key 100 6.0 0.27 2.2 6.8 4 2200 3
JK86HSN85 1.8 2 Key 115 6.0 0.36 3.8 8.5 4 2700 4.2
JK86HSN120 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 operation of a closed loop stepper motor is fundamentally based on a feedback system, typically utilizing an encoder to continuously track the rotor's position. Here’s a detailed breakdown of the process:

 

Initial Input Signal:

The operating controller sends a pulse or command to instruct the motor to move to a specific position or to rotate at a designated speed.

 

Motor Movement:

The stepper motor responds by moving in small, precise increments that correspond to the pulse signals it receives. Unlike traditional open-loop systems, this movement occurs with real-time monitoring.

 

Feedback via Encoder:

As the motor operates, an encoder or position sensor tracks the rotor's actual position. This real-time feedback is relayed back to the controller, allowing it to monitor the motor's performance.

 

Adjustment of Current:

If the encoder data indicates a discrepancy between the desired position and the actual position—potentially caused by variations in load or other external factors—the controller adjusts the current flowing to the motor to rectify the difference.

 

Continuous Monitoring and Correction:

This feedback process is ongoing, ensuring that the motor remains within its optimal operational parameters, even as conditions change around it.

 

The primary distinction between closed loop and open loop stepper motors lies in the feedback system. Closed loop motors can make continual adjustments, resulting in improved precision, stability, and efficiency during operation.

 

 

Key Features of Closed Loop Stepper Motors

High Precision Control:

The feedback mechanism in closed loop stepper motors allows for accurate responses to input commands, effectively correcting issues like missed steps or positional shifts that can happen in open-loop systems.

 

Improved Efficiency:

These systems intelligently adjust their power consumption based on actual load requirements, minimizing energy waste and enhancing overall efficiency.

 

Lower Heat Generation:

By regulating power usage through feedback, closed loop motors produce less heat compared to open-loop motors, which operate on a constant power supply even when full power isn't needed.

 

Reduced Noise and Vibration:

The continuous monitoring and adjustments made possible by the feedback system lead to smoother operation, resulting in significantly lower noise and vibration levels than those found in open-loop stepper motors.

 

Product-Focused FAQs

1. How does a closed loop stepper motor differ from an open loop stepper motor?

Unlike open loop types, closed loop motors use encoder feedback to adjust motion and avoid missed steps.
 

2. What encoder types are used in Jkongmotor closed loop steppers?

They can use optical or magnetic encoders with resolutions like 1000 or 1024 lines.
 
3. What benefits do closed loop steppers provide?
Benefits include higher precision, automatic torque control, less heat and noise, and no position drift.
 

4. What standard sizes are available for these motors?

Jkongmotor offers sizes such as NEMA11, NEMA17, NEMA23, NEMA24, NEMA34, Nema42, and Nema52.
 

5. What step angle do these closed loop motors have?

They typically have a 1.8° step angle per pulse.
 

6. What is holding torque on Jkongmotor’s closed loop motors?

Depends on size — e.g., NEMA17 models can reach tens of N·cm. Manufacturers list specific torque on spec tables.
 

7. Can closed loop motors run at high speed without resonance?

Yes — the feedback control helps deliver smoother high-speed performance.
 

8. Do these motors reduce vibration and noise?

Yes — real-time feedback and corrections minimize motor vibration and noise output.
 

9. Do closed loop steppers use less energy than open loop ones?

Yes — they regulate current based on load, improving energy efficiency.
 

Customization & Factory Capability FAQs

1. Can I order closed loop stepper motors with custom connectors?

Yes — Jkongmotor offers connector customization as an optional factory service.
 

2. Is encoder customization available?

Yes — customers can choose between magnetic or optical encoders, and potentially resolution specifications.
 

3. Can I add a gearbox or brake to my motor?

Yes — optional accessories like gearboxes and brakes can be added for custom requirements.
 

4. What NEMA frame sizes can be customized for closed loop versions?

Sizes from NEMA8 up through NEMA34 are supported for customization.
 

5. Does Jkongmotor offer OEM/ODM services?

Yes — the company provides OEM/ODM closed loop stepper motor manufacturing for bespoke projects.
 

6. What certifications does Jkongmotor hold?

The motors and factory processes can be supplied with CE, RoHS, Reach, CCC, ISO9001, ISO14001, and other certifications.
 

7. Can I customize the motor shaft type?

Yes — shaft configurations (e.g., D-cut, keyway) can be customized based on application needs.
 

8. What is the typical MOQ (minimum order quantity) for customized motors?

Minimum orders typically range from 10 pieces, depending on model and customization.
 

9. How long does it take to receive customized stepper motors?

Sample orders can ship in 7–15 days, and bulk orders in 15–25 days, typically.
 

10. Can I get integration services with drivers or controllers?

Yes — Jkongmotor can integrate encoders, drivers, and other components into a complete custom motion solution.
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