1. Introduction
The SUP20S Handheld Laser Welding Gun is a versatile tool designed for high-accuracy applications in various industries, including building material shops, manufacturing plants, machinery repair shops, food & beverage factories, construction works, and energy & mining. This device functions as a laser welding gun, and with appropriate attachments, can also be used for laser cutting and laser cleaning.
This manual provides essential information for the safe and effective use, maintenance, and troubleshooting of your SUP20S Handheld Laser Welding Gun.


2. Safety Information
Always observe the following safety precautions when operating the laser welding gun:
- Wear appropriate personal protective equipment (PPE), including laser safety glasses, gloves, and protective clothing.
- Ensure the work area is well-ventilated and free from flammable materials.
- Never point the laser at people or animals.
- Do not operate the device if any components are damaged or missing.
- Refer to the main laser system's safety manual for comprehensive safety guidelines.
3. Product Components and Overview
The handheld laser welding gun consists of several key components:
- Gun Head Body: The main housing of the laser gun.
- First Protective Mirror Drawer: Contains the first protective mirror.
- Second Protective Mirror Drawer: Contains the second protective mirror.
- Copper Tip Fixed Shaft: Secures the copper tip.
- Lock Nut: Used to secure the nozzle.
- Double Wire Feed Copper Nozzle: Directs the laser and provides shielding gas.
- Double Wire Feeding Fixture: Guides the welding wire (if applicable).
- Screen Upper Cover: Protects the display screen.
- Switch Button: Activates the laser.
- Handle: Ergonomic grip for handheld operation.
- Collimator: Shapes the laser beam.
4. Setup and Installation
Before operating the laser welding gun, ensure it is properly connected to a compatible fiber laser system and power supply. The gun head is designed for modularity, allowing for different nozzles and accessories.
4.1 Nozzle Replacement
The nozzle is a consumable part that may need to be replaced due to wear or to change the application (e.g., welding, cutting, cleaning).
- Carefully unscrew the existing nozzle from the gun head.
- Remove the old nozzle and any associated protective components.
- Insert the new nozzle, ensuring it is correctly aligned.
- Finally, screw on the nozzle securely until hand-tight. Do not overtighten.

5. Operating Instructions
The SUP20S is designed for handheld operation, offering flexibility for various tasks. Ensure all connections are secure and the laser system is powered on and ready before beginning operation.
- Power On: Follow the startup procedure for your main fiber laser system.
- Select Mode: Depending on the attached head, the gun can perform welding, cutting, or cleaning. Ensure the correct head is installed for your desired application.
- Activate Laser: Press the 'Switch Button' on the handle to activate the laser. Release the button to stop the laser.
- Workpiece Preparation: Prepare the workpiece according to the specific requirements of laser welding, cutting, or cleaning. This may include cleaning surfaces and ensuring proper fit-up.
- Maintain Distance: Keep the nozzle at the appropriate working distance from the workpiece for optimal results.

6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your laser welding gun. Always power off the laser system and disconnect the gun before performing any maintenance.
- Nozzle Inspection and Replacement: Regularly inspect the nozzle for wear, blockages, or damage. Replace as needed (refer to Section 4.1).
- Protective Mirror Cleaning/Replacement: The protective mirrors (located in the First and Second Protective Mirror Drawers) are crucial for laser beam quality and safety. Inspect them regularly for dust, debris, or damage. Clean them with appropriate optical cleaning supplies or replace them if damaged.
- General Cleaning: Keep the exterior of the gun clean and free from dust and debris. Use a soft, dry cloth.
- Cable Inspection: Periodically check all connecting cables for signs of wear, cuts, or damage. Replace damaged cables immediately.
7. Troubleshooting
This section provides general guidance for common issues. For complex problems, contact technical support.
- No Laser Output:
- Check if the main laser system is powered on and operational.
- Ensure all cables are securely connected.
- Verify that the safety interlocks are engaged.
- Inspect the nozzle and protective mirrors for blockages or damage.
- Poor Welding/Cutting/Cleaning Quality:
- Check the condition of the nozzle and replace if worn or damaged.
- Clean or replace protective mirrors.
- Ensure correct laser parameters (power, speed, focus) are set on the main system.
- Verify proper gas flow (if applicable).
If the issue persists after performing these checks, please contact customer support for further assistance.
8. Specifications
| Feature | Specification |
|---|---|
| Product Name | Handheld Laser Welding Torch |
| Model | SUP20S |
| Brand | SUP |
| Type | Hand Tool Parts |
| Laser Type | Fibre Laser |
| Wavelength | 340-360nm |
| Key Selling Points | High-accuracy |
| Accessory Type | Power Supply |
| Weight (Gun Head) | 2 kg |
| Package Dimensions (L x W x H) | 30 cm x 25 cm x 18 cm |
| Package Weight | 2.0 kg |
| Condition | New |
| Place of Origin | JiangSu, China / Mainland China |
9. User Tips
- Model Compatibility: When selecting replacement parts or additional accessories, it is recommended to provide a photo of your current product or clearly state your needs to ensure compatibility.
- Professional Guidance: For complex setups or specific application requirements, consult with a professional or the manufacturer's technical support.
- Regular Checks: Proactive inspection of nozzles and protective mirrors can prevent unexpected downtime and maintain consistent performance.
10. Warranty and Support
The SUP20S Handheld Laser Welding Gun comes with a 1-year warranty.
For technical support, inquiries about spare parts (such as reflective mirrors, welding gun nozzles, protection mirrors, reflectors, collimation mirrors, and focusing mirrors), or any other assistance, please contact ZNK Laser Technology (Jiangsu) Co., Ltd. directly.
Contact Information:
- WhatsApp: +86 15674995468

