High Resolution Stepper Motor 0.9 Degree Step- Suzhou Retek Electric Technology Co., Ltd.

High-Resolution 0.9° Stepper: Doubling Positional Accuracy

The High Resolution Stepper Motor featuring a native 0.9∘ step angle (400 steps per revolution) offers twice the positional resolution of the standard 1.8∘ stepper (200 steps/rev).

This motor is critical for applications demanding extremely fine angular movement and enhanced micro-stepping performance. By doubling the number of physical steps, the motor reduces the static error between steps and provides smoother motion, especially important when operating at low micro-stepping resolutions (e.g., 1/2 or 1/4 step). The 0.9∘ motor typically has a slightly higher winding resistance/inductance than its 1.8∘ counterpart, which must be accounted for in the drive system design.

Introduction

Detailed Parameters and Performance Data

RETEK: Enhanced Precision for Optical and Alignment Systems

Suzhou Retek Electric Technology Co., Ltd. provides high-resolution steppers (0.9∘ and sometimes 0.45∘) for precision metrology, optical manipulation, and high-quality 3D printing. We focus on achieving the tightest possible step-angle tolerance (e.g., ±3%) through ultra-precision rotor-stator alignment and meticulous tooth geometry. This series offers superior positional accuracy and reduced vibration without the cost and complexity of a closed-loop servo system.

Applications

Advanced Technology Highlights

Extreme Precision Applications for 0.9° Stepper Motors

Automated Optical Inspection (AOI) Systems: Motors for lens positioning, aperture control, and rotary stages requiring high angular fidelity. Challenge: Minimizing oscillation and maximizing repeatability.
Scientific Instrumentation: Drives for spectrometers, laboratory fluidics, and high-precision sampling systems.
High-Fidelity 3D Printers: Providing smoother Z-axis lift and more accurate X/Y movement, minimizing visible layer lines and artifacts.
Micro-Machining: Actuators for small, high-precision linear and rotary stages used in micro-manufacturing.

Technical Specifications

Industrial & Commercial Usage

Technical Parameters (0.9° High Resolution)

Parameter	Range / Typical Value	Unit
Step Angle (Native)	0.9	Degrees
Steps per Revolution	400	Steps
Step Angle Tolerance	Typically ±3%	Percentage
Holding Torque Options	NEMA 17, 23, 34	Frame Sizes
Micro-stepping Resolution	Up to 51,200 steps/rev	Achievable

Additional Information

Supplementary Details & Notes

Integrated Production and Customization Workflow

Production includes advanced automated winding and final inspection via a dedicated step-angle testing system (torquemeter) to guarantee the advertised ±3% angular tolerance.

Custom Winding Optimization: Providing customized windings to minimize inductance for the best balance of torque and speed in 0.9∘ models.
Integrated Lead Screw: Factory assembly of the 0.9∘ motor with a precision rolled or ground lead screw for highly accurate linear motion applications.
Vacuum/Cryogenic Use: Customizing materials and assembly procedures (e.g., low-outgassing grease, specialized wire insulation) for use in vacuum chambers or cryogenic environments.
Integrated Damper: Providing factory-installed viscous dampers to further reduce low-speed resonance and improve settling time.

Service & Support

Technical Advantages and Core Design Features

Double the Native Resolution: Provides finer movement without relying on high micro-stepping divisions, which can lead to reduced torque.
Smoother Micro-stepping: The finer native step reduces the magnitude of the torque ripple between micro-steps, resulting in significantly smoother, quieter motion, especially at low velocities.
Improved Positional Repeatability: Tighter tooth geometry and pitch lead to a smaller static step error, enhancing the final positioning accuracy.
Low Vibration at Low Speed: The high pole count effectively smooths out the movement, minimizing resonance issues often seen in 1.8∘ motors at certain speeds.
Retrofit Potential: Can often be directly substituted for a 1.8∘ motor (requiring only a change in the drive pulse count) to gain immediate positional improvement.

Frequently Asked Questions

Common Inquiries Regarding 0.9° Stepper Motors

Q: Is the torque of a 0.9∘ motor the same as a 1.8∘ motor of the same size?
A: The static holding torque is often very similar, but the 0.9∘ motor often has a slightly steeper drop in torque at high speeds due to its higher electrical time constant (inductance). It is best optimized for low-to-medium speeds.

Q: Why is micro-stepping smoother with a 0.9∘ motor?
A: Torque ripple is the change in holding torque as the motor moves between full steps. Since the 0.9∘ step is half the size, the change in torque between steps is also smaller, leading to a smaller "jerk" and visually smoother motion during micro-stepping.

Q: Do I need a special driver for a 0.9∘ motor?
A: Electrically, any bipolar stepper driver will work. However, you must update your motion controller's firmware or configuration settings to send twice the number of pulses per revolution (e.g., 400 pulses/rev instead of 200 pulses/rev for a full-step movement).

Resources

Advanced Material Selection Guide

Rotor: High-precision toothed rotor stack with extremely tight pitch tolerance to ensure accurate 0.9∘ step definition.

Magnets: Premium grade NdFeB magnets, ensuring the magnetic field is strong and consistent across the increased pole density.

Bearings: High-quality ABEC 5 or higher precision ball bearings to minimize mechanical run-out that could compromise the fine angular accuracy.

About Suzhou Retek Electric Technology Co., Ltd.

Unlike other motor suppliers, Retek engineering system prevents the selling of our motors and components by catalogue as every model is customized for our customers. The customers are assured that every component they receive from Retek is designed with their exact specifications in mind. Our total solutions are a combination of our innovation and a close working partnership with our customers and suppliers.

As China High Resolution Stepper Motor 0.9 Degree Step Manufacturers and Wholesale High Resolution Stepper Motor 0.9 Degree Step OEM/ODM Suppliers, Retek business consists of three platforms: Motors, Die-Casting and CNC manufacturing and wire harness. Retek products are widely supplied for residential fans, vents, boats, airplanes, medical facilities, laboratory facilities, trucks and other automotive machines.

Welcome to send us an RFQ, it is believed you will get the best cost-effective products and services here!

Customized Solutions

Quality Assurance

Global Export

Suzhou Retek Electric Technology Co., Ltd.

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