1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your YUN DUAN Harmonic Drive High Precision Cup Type Servo Motor. These harmonic reducers are designed for applications requiring zero backlash, high torque, and high precision, such as industrial robots, service robots, metal-machine tools, medical devices, analysis and test equipment, energy-related equipment, and papermaking equipment.
2. Safety Information
Always observe the following safety precautions to prevent injury and damage to the equipment:
- Ensure all power is disconnected before installation, maintenance, or troubleshooting.
- Installation and maintenance should only be performed by qualified personnel.
- Wear appropriate personal protective equipment (PPE) during installation and maintenance.
- Avoid contact with moving parts during operation.
- Do not exceed the specified load, speed, or torque limits.
- Ensure proper grounding to prevent electrical hazards.
- Keep the unit free from dust, moisture, and corrosive substances.
3. Product Overview
The harmonic reducer consists of three main components: the Wave Generator, Flexspline, and Circular Spline. It features a cup structure design, offering high precision and high torque with minimal backlash.
3.1 Components and Principle
- Wave Generator: An elliptical ball bearing assembly that deforms the Flexspline.
- Flexspline: A thin-walled, flexible cup with external teeth that mesh with the Circular Spline.
- Circular Spline: A rigid ring gear with internal teeth, typically fixed.
The wave generator forces the flexspline into an elliptical shape, causing its teeth to engage with the circular spline. As the wave generator rotates, the engagement point shifts, resulting in a precise, high-ratio reduction.
3.2 Key Features
- High Precision: Achieves very high position accuracy and rotation accuracy due to multiple teeth meshing simultaneously and minimal backlash.
- Easy to Install: The coaxial design of the three basic components simplifies installation.
- Compact and Lightweight: Compared to traditional gear devices, these reducers offer a smaller size and lighter weight while maintaining high torque capacity and deceleration ratios.
4. Specifications
The ZXS series harmonic reducers are made from aluminum alloy. Below are the detailed specifications for various models and ratios.
4.1 General Properties
- Material: Aluminum alloy
- High-concerned chemical: None
- Type: Other (Harmonic Reducer)
- Origin: Mainland China
4.2 Performance Parameters
Note: The table above provides detailed parameters including speed ratio, backlash, weight, rated torque, permissible torque, allowable average load torque, instantaneous MAX allowable torque, MAX allowable input speed, lubrication type, and moment of inertia for ZXS14, ZXS17, ZXS20, ZXS25, and ZXS32 models across various ratios (30:1, 50:1, 80:1, 100:1, 120:1).
Specific notes from the table:
- ZXS14: Has two types of shaft holes: standard conventional shaft hole 8mm and keyway 3mm; Equipped with a stepper motor shaft hole of 5mm, without keyway.
- ZXS17: Has two types of shaft holes: standard conventional shaft hole 8mm and keyway 3mm; Equipped with a stepper motor shaft hole of 5mm, without keyway.
- ZXS20: Has two types of shaft holes: standard conventional shaft hole 14mm, keyway 5m; Equipped with 8mm stepper motor shaft hole, without keyway.
- ZXS25: Has two types of shaft holes: standard conventional shaft hole 14mm and keyway 5mm; Equipped with 8mm stepper motor shaft hole, without keyway.
- ZXS32: Has two types of shaft holes: standard conventional shaft hole 19mm and keyway 6mm; Equipped with a stepper motor shaft hole of 14mm and a keyway of 5mm.
5. Setup
Proper installation is crucial for the performance and longevity of your harmonic reducer.
5.1 Pre-installation Check
Before installation, confirm the shaft diameter, shaft length, and keyway width of your motor to ensure compatibility with the wave generator. The wave generator needs to be installed with the motor output shaft.
5.2 Motor Flange Mounting
The harmonic reducer comes with a motor flange mounting plate for easy integration. No additional customization is required if using the provided flange.
Refer to the specific model diagrams below for dimensions and adapted motor sizes:
- ZXS14: For Nema 17 42mm Flange Stepper Motor.
- ZXS17: For 100W 40mm Flange Servo Motor or Nema 17 42mm Stepper Motor.
- ZXS20: For 60mm Flange Servo Motor or Nema 23 57mm Stepper Motor.
- ZXS25: For 60mm Flange Servo Motor.
- ZXS32: For 80mm Flange Servo Motor or Nema 34 86mm Stepper Motor.
5.3 Lubrication
Ensure the harmonic drive is properly lubricated before initial operation. Lubrication is essential for cooling, cleaning, sealing, and ensuring the normal operation of the gearbox.
6. Operating Instructions
Once properly installed and lubricated, the harmonic drive is ready for operation. Ensure your motor is correctly configured to provide the appropriate input speed and torque as per the specifications in Section 4.2.
- Operate within the specified MAX allowable input speed and torque limits to prevent damage.
- Monitor for unusual noises or vibrations during initial operation.
- The high reduction ratio and zero backlash characteristics make these units ideal for precise positioning and motion control.
7. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your harmonic reducer.
- Lubrication: Periodically check and replenish the lubricant as indicated in the specifications (oil or grease lubrication). The frequency depends on operating conditions and environment.
- Inspection: Regularly inspect the unit for any signs of wear, damage, or loose fasteners. Pay attention to the motor mounting flange and the connection points.
- Cleaning: Keep the exterior of the reducer clean and free from debris, especially around seals and ventilation points (if any).
- Environmental Conditions: Ensure the operating environment remains within recommended temperature and humidity ranges.
8. Troubleshooting
If you encounter issues with your harmonic drive, consider the following common problems and solutions:
- Unusual Noise/Vibration:
- Check for proper mounting and alignment of the motor and reducer.
- Verify adequate lubrication.
- Inspect for any foreign objects or damaged components.
- Reduced Performance/Accuracy:
- Ensure the motor is providing the correct input.
- Check for excessive wear in the Flexspline or Circular Spline (requires disassembly by qualified personnel).
- Verify that operating parameters are within specified limits.
- Overheating:
- Check lubrication levels and type.
- Ensure the unit is not overloaded.
- Verify proper ventilation if applicable.
For persistent issues, contact technical support.
9. User Tips
- Motor Matching: Always ensure your servo or stepper motor's specifications (power, flange size, shaft dimensions) precisely match the harmonic reducer model and its adapted motor size for optimal performance and longevity.
- Precision Applications: Due to their zero-backlash and high-precision characteristics, these reducers are best utilized in applications where exact positioning and smooth motion are critical.
- Lubrication Type: Pay close attention to the specified lubrication type (oil or grease) for your specific model and ratio, as indicated in the specifications table, to ensure proper functioning and prevent premature wear.
10. Warranty & Support
YUN DUAN products are manufactured to high-quality standards. For any product-related inquiries, technical assistance, or warranty claims, please contact our support team using the information below. Please have your product model and purchase details ready.
Contact Information:
- WeChat: +86 16763080180
- WhatsApp/Phone: +8616763080180
- Email: 3568000736@qq.com