1. Introduction
The SUNKKO 73B Integrated Spot Welding Pen is a high-precision handheld tool designed for DIY battery spot welding. It features an automatic trigger switch and is intended for use with compatible spot welders such as the SUNKKO 737G+ and 737DH models. This manual provides essential information for the safe and effective setup, operation, and maintenance of your welding pen.
2. Key Features
- Integrated Design: Combines the welding pen and trigger for ease of use.
- Adjustable Welding Pressure: Knob for precise control, ranging from 600g to 1200g.
- Adjustable Needle Distance: Welding needles can be adjusted from 3mm to 7mm.
- Real-time Indicator Lights: Blue and yellow lights provide visual feedback during welding.
- Low Resistance: Ensures good conductivity and efficient output current (0.747mΩ).
- Effective Heat Dissipation: Maintains low operating temperature (approx. 38°C) for comfort and safety.
- Compatibility: Designed for use with various spot welders, including SUNKKO 737G+ and 737DH.
- Removable Welding Needles: For easy replacement and maintenance.
3. Specifications
| Attribute | Value |
|---|---|
| Product Name | Adjustable instantaneous welding pen |
| Product No. | S-73B |
| Type | Integrated Spot Welding Pen |
| Welding Needles Distance | 3~7mm (Adjustable) |
| Size of Welding Needles | 35mm x 3mm |
| Loading Voltage | 4~6V |
| Loading Current | 1500A |
| Size of Hand Shank | 50mm x 33mm x 180mm |
| Weight (without copper wire) | 0.145kg |
| Max. Welding Thickness | 0.05~0.4mm (Reference spot welder welding range) |
| Recommended Spot Welders | 737G+, 737DH, 709AD+ |
| Cable Size Options | 16 Square / 25 Square Pure Copper Braid Belt |
| Origin | Mainland China |
| Certification | CE |
| Is Smart Device | No |
4. Package Contents
The contents of your package may vary slightly depending on the plug type (O-plug or U-plug) selected.
For O-Plug Version:
- SUNKKO 73B Integrated Spot Welding Pen
- 1.5mm wrench for dismounting welding needles
- 2mm wrench for copper wire port
- Welding needles (set)
- Key for adjustment of welding pressure
- 3mm screwdriver
For U-Plug Version:
- SUNKKO 73B Integrated Spot Welding Pen
- M3*5 screws
- Welding needles (set)
- Key for adjustment of welding pressure
- 3mm screwdriver
5. Setup
- Connect to Spot Welder: Ensure your spot welder is turned off. Connect the welding pen to your compatible spot welder using the appropriate O-type or U-type plug. The pen features a 2.5 port DC wire (65cm length) that supports automatic welding functions.
- Select Cable Size: Choose between the 16 square or 25 square pure copper braid belt based on your welding needs.
- Adjust Welding Needle Distance: Use the provided 3mm screwdriver to adjust the distance between the welding needles. The distance can be set from 3mm (shortest) to 7mm (longest) for optimal contact with different workpieces.
- Adjust Welding Pressure: Use the provided key to adjust the welding pressure knob on the pen. The pressure can be set from a minimum of 600g (suitable for 0.1mm nickel strip) to a maximum of 1200g (suitable for 0.3mm nickel strip). Adjust according to the thickness of the material you are welding.
- Power On: Once all connections and adjustments are made, turn on your spot welder.
6. Operation
- Prepare Workpiece: Ensure the surfaces to be welded are clean and free of oxidation or contaminants.
- Position Pen: Hold the welding pen firmly and position the welding needles directly over the nickel strip and battery terminal.
- Apply Pressure: Apply slight downward pressure to the pen. The automatic trigger switch will activate the welding process.
- Observe Indicator Lights: The blue and yellow indicator lights will illuminate in real-time during welding, confirming the operation.
- Check Weld Quality: After welding, carefully inspect the weld spot. A strong weld should be firm and not easily fall off. The 73B pen, when used with a 737G+ spot welder, can achieve welds on 0.3mm nickel strips with a pulling weight of 2.66KGS.
- Welding Various Materials: The pen is suitable for welding a range of materials and thicknesses, including 0.15mm aluminum nickel composite strips (for lithium iron phosphate batteries), 0.3mm nickel strips on lithium batteries, and circuit boards.
7. Maintenance
- Clean Welding Needles: Regularly clean the tips of the welding needles to ensure optimal conductivity and prevent contamination.
- Replace Welding Needles: If the welding needles become worn or damaged, they can be easily dismounted and replaced using the provided 1.5mm wrench.
- Inspect Cables: Periodically check the copper braid belts and DC wire for any signs of wear or damage.
- Storage: Store the welding pen in a clean, dry environment when not in use.
8. Troubleshooting
- No Weld/Weak Weld:
- Ensure the welding pen is securely connected to the spot welder.
- Check the welding needle distance and adjust if necessary.
- Increase the welding pressure using the adjustment knob.
- Verify that the spot welder's settings (e.g., pulse, current) are appropriate for the material thickness.
- Clean the welding needle tips and workpiece surfaces. - Overheating:
- While the 73B is designed for effective heat dissipation, ensure adequate ventilation around the spot welder and pen during prolonged use. - Indicator Lights Not Working:
- Check the connection to the spot welder. If the issue persists, consult your spot welder's manual or contact support.
9. User Tips
No specific user tips were available from reviews or Q&A content for this product at this time. Always refer to the spot welder's manual for optimal settings and safety precautions.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided with your original spot welder or contact the manufacturer directly. Ensure you retain your proof of purchase for any warranty claims.
