VEVOR 788H Dual Pulse Spot Welder Instruction Manual

1. Introduction

The VEVOR 788H Dual Pulse Spot Welder is an advanced 2-in-1 machine designed for both spot welding and lithium battery charging/testing. This micro-computer controlled unit offers precision, high reliability, and energy efficiency, making it suitable for a wide range of applications from battery pack assembly to delicate soldering tasks. This manual provides essential information for safe operation, setup, maintenance, and troubleshooting to ensure optimal performance and longevity of your device.

2. Safety Instructions

Always adhere to the following safety guidelines to prevent injury and damage to the equipment.

2.1 General Safety

• Read and understand all instructions before operating the machine.
• Keep the work area clean and well-lit. Cluttered or dark areas invite accidents.
• Do not operate the machine in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
• Keep children and bystanders away while operating the machine. Distractions can cause you to lose control.
• Wear appropriate personal protective equipment (PPE), including safety glasses, gloves, and protective clothing.

2.2 Electrical Safety

• Ensure the power supply matches the voltage specified on the machine (AC 110V for US, AC 220V for EU/AU).
• Do not expose the machine to rain or wet conditions. Water entering the machine will increase the risk of electric shock.
• Do not abuse the power cord. Never use the cord for carrying, pulling, or unplugging the machine. Keep cord away from heat, oil, sharp edges, or moving parts.
• Always unplug the machine from the power source before making any adjustments, changing accessories, or storing it.
• Avoid touching live electrical parts or electrodes with bare hands or wet clothing.

3. Package Contents

Verify that all items listed below are included in your package:

• 1 x 2 in 1 Spot Welder Battery Charger (Main Unit)
• 1 x Foot Controller
• 1 x Battery Holder
• 2 x Fuse Tube
• 4 x Welding Pins for Fixed Welding
• 1 x Hex Wrench
• 1 x Plated Nickel Set (0.1*4*100mm; 0.15*5*100mm; 0.2*5*100mm)
• 1 x Pure Nickel Set (0.15*8*100mm)
• 1 x 1Kg Nickel Plated Steel Strip (Included for US orders only; EU/AU orders do not include nickel plate)

4. Product Features and Components

The VEVOR 788H is equipped with several features for efficient and precise operation:

4.1 Distinct LCD Panel

The front panel features a clear LCD display that shows the pulse quantity and current settings. This allows for easy and quick adjustment of welding parameters, ensuring a smoother operation.

4.2 LED Lighting Function

The welding electrodes are equipped with double high-brightness LED lights. This feature enhances visibility in low-light environments, ensuring precise electric welding and making operations easier for all users.

4.3 Accurate Welding Pressure Regulator

A dedicated knob allows continuous adjustment of the welding pin pressure from 300g to 750g. This enables precise control for welding workpieces of varying thicknesses, resulting in strong and reliable solder joints.

4.4 Battery Tester & Charger

The unit includes a battery testing and charging function. This allows for convenient charging and testing of batteries, and you can determine internal resistance by selecting the appropriate charging current.

5. Setup

1. Unpacking: Carefully remove all components from the packaging. Inspect for any shipping damage.
2. Placement: Place the spot welder on a stable, level, and non-flammable surface. Ensure adequate ventilation around the unit.
3. Power Connection: Connect the power cord to the appropriate AC outlet (110V for US, 220V for EU/AU).
4. Foot Controller Connection: Plug the foot controller into its designated port on the front panel.
5. Welding Pins: Ensure the fixed welding pins are securely installed. If using the mobile welding pen (not explicitly listed in package but implied by 'mobile welding way'), connect it to the appropriate terminals.
6. Initial Power On: Flip the main power switch to the 'ON' position. The LCD display should illuminate.

6. Operating Instructions

6.1 Spot Welding Operation

1. Select Welding Mode: Ensure the 'WELDING' switch is engaged.
2. Adjust Pulse Quantity: Use the 'PULSE GROUP' knob to select the desired number of pulses (1 or 2).
3. Set Welding Current: Use the 'SET CURRENT' knob and the digital setting buttons (up/down arrows) to adjust the welding current (50-800A). Start with lower settings and increase as needed.
4. Adjust Welding Pressure: Use the 'Welding Pressure Adjuster' knob to set the appropriate pressure for your material (300g-750g).
5. Position Workpiece: Place the nickel strip and battery terminal (or other material) between the welding pins. Ensure good contact.
6. Initiate Weld: Press the foot controller pedal to initiate the welding process. The LED lights will illuminate during welding.
7. Inspect Weld: After welding, inspect the joint for strength and consistency. Adjust settings as necessary.

6.2 Battery Charging and Testing

1. Select Charging Mode: Ensure the 'CHARGE' switch is engaged.
2. Connect Battery: Use the provided battery holder or cables to connect the battery to the 'TEST/CHARGE' ports. Observe polarity (+ to + and - to -).
3. Set Charging Voltage: Use the 'VOLTAGE' knob to adjust the charging voltage (4.2-36V).
4. Set Charging Current: Use the 'CURRENT' knob to adjust the charging current (0-2A).
5. Monitor Display: The LCD will show the current voltage and current during charging.
6. Test Function: The 'TEST' function allows you to measure the voltage of the connected battery.

7. Maintenance

Regular maintenance ensures the longevity and optimal performance of your spot welder.

• Cleaning: Regularly clean the welding pins and electrodes to remove any residue or oxidation. Use fine-grit sandpaper or a specialized electrode cleaner.
• Inspection: Periodically inspect all cables, connections, and the foot controller for signs of wear or damage. Replace any damaged parts immediately.
• Fuse Replacement: If the unit fails to power on or operate, check the fuse. Replace with a fuse of the same type and rating (2 fuse tubes are included in the package).
• Storage: Store the machine in a dry, clean environment away from direct sunlight and extreme temperatures.

8. Troubleshooting

9. Specifications

10. User Tips

• Practice First: Always test your welding settings on scrap material before working on your final project to achieve optimal results.
• Ventilation is Key: Ensure your workspace is well-ventilated to dissipate any fumes produced during welding.
• Clean Electrodes: Keep the welding pins clean and sharp. Dirty or dull pins can lead to inconsistent welds.
• Consistent Pressure: Apply even and consistent pressure when welding to ensure a strong and uniform bond.
• Battery Polarity: Double-check battery polarity before connecting for charging or testing to prevent damage to the battery or the unit.

11. Warranty and Support

For warranty information, technical support, or service inquiries, please contact VEVOR customer service through their official channels. Keep your purchase receipt and product model number handy for faster assistance.