1. Important Safety Information
Always read and understand all safety warnings and instructions before operating this welding machine. Failure to follow these instructions may result in electric shock, fire, serious injury, or death.
- Electric Shock Can Kill: Do not touch live electrical parts. Wear dry welding gloves and protective clothing. Ensure the workpiece is properly grounded.
- Fumes and Gases Can Be Hazardous: Keep your head out of the fumes. Use enough ventilation, exhaust at the arc, or both, to keep fumes and gases away from your breathing zone and the general area.
- Arc Rays Can Burn Eyes and Skin: Wear a welding helmet with a proper shade of filter lens to protect your eyes and face. Wear appropriate protective clothing to protect your skin.
- Fire and Explosion Hazard: Remove all flammables from the welding area. Have a fire extinguisher nearby.
- Hot Parts Can Cause Severe Burns: Allow hot parts to cool before handling. Do not touch hot metal with bare hands.
- Magnetic Fields Can Affect Pacemakers: Pacemaker wearers should consult their doctor before operating this equipment.
Keep children away from the welding area. Do not allow untrained personnel to operate the machine.
2. Product Overview
The GZ GUOZHI MIG-135LCD is a versatile 2-in-1 semi-automatic welding machine designed for both arc welding (MMA) and non-gas wire welding (MIG). It features inverter control for stable performance and a digital display for precise adjustments.
Key Features:
- 2-in-1 Multi-functional: Supports Arc Welding (MMA) and Non-Gas Wire Welding (MIG). Suitable for various base materials including cast iron, mild steel, and stainless steel.
- Inverter Control: Advanced inverter technology ensures smooth arc ignition, minimal spatter, and high-quality welds. Uses flux-cored wire, eliminating the need for shielding gas.
- Dual Digital Display: Clear digital display for both current and voltage, allowing for precise and independent adjustment via dials. Optimize power for different wire diameters, metal types, and thicknesses.
- Beginner-Friendly: Equipped with a "Hot Start" function for quick arc ignition, making it easy for new users to operate.
- Comprehensive Protection: Features overheat protection, overcurrent protection, and overload protection for enhanced safety and durability. Integrated forced air cooling fan prevents heat-related malfunctions.
- Portable Design: Weighing approximately 4.54kg, this compact and lightweight machine is easy to carry and suitable for home use and various DIY projects.
Product Components:
The package includes the main welding unit, an electrode holder, an earth clamp, and a torch cord.
Figure 2.1: GZ GUOZHI MIG-135LCD Welder showing MIG and MMA configurations.
Figure 2.2: Detailed view of the digital display and control panel.
Figure 2.3: The GZ GUOZHI MIG-135LCD welding machine with its standard accessories, including electrode holder, earth clamp, and torch.
3. Setup Instructions
3.1 Wire Installation (for MIG Welding)
- Open the side cover of the welding machine.
- Remove the butterfly nut from the wire tray spindle.
- Place the flux-cored wire spool onto the spindle, ensuring it rotates freely.
- Secure the wire spool with the butterfly nut.
- Lift the retainer arm of the wire feeder mechanism.
- Feed the wire through the guide roller and into the conduit, ensuring it is straight and not bent.
- Lower the retainer arm and adjust the tension knob to lightly secure the wire.
- Close the side cover.
Figure 3.1: Proper installation of the flux-cored wire spool and feeding the wire through the mechanism.
Video 3.1: Demonstration of wire installation and setup for MIG welding mode on a similar semi-automatic welder. This video shows how to correctly load the welding wire and prepare the machine for operation.
Video 3.2: A visual guide to installing the welding wire and setting up the wire feed mechanism for a semi-automatic welder. This process is crucial for proper MIG welding.
3.2 Connecting Accessories
- Connect the MIG torch to the designated port on the front panel. Ensure it is securely inserted and rotated to lock.
- Connect the earth clamp cable to the negative (-) terminal on the front panel. Attach the earth clamp securely to the workpiece.
- For MMA welding, connect the electrode holder cable to the positive (+) terminal and the earth clamp cable to the negative (-) terminal.
Video 3.3: This video demonstrates the connection method for the MIG torch and earth clamp to the welding machine. Proper connection is essential for safe and effective welding.
Video 3.4: A quick guide on connecting the welding accessories, including the MIG torch and ground clamp, to the welding unit. This ensures the machine is ready for operation.
3.3 Power Connection
Connect the power cord to a suitable 100V power outlet. The machine supports 100V operation. Ensure the power switch on the rear panel is in the "OFF" position before connecting to power.
Figure 3.2: The compact size and lightweight design of the GZ GUOZHI MIG-135LCD, highlighting its portability for various work environments.
4. Operating Instructions
4.1 Selecting Welding Mode
Turn on the power switch. Use the mode selection button on the front panel to switch between MIG and MMA welding modes. The digital display will show the selected mode and allow for current/voltage adjustments.
Figure 4.1: The digital display allows for easy selection of welding modes and precise adjustment of parameters.
4.2 MIG Welding (Non-Gas Wire)
- Ensure the wire is correctly installed and the MIG torch is connected.
- Select "MIG" mode on the control panel.
- Adjust the current and voltage using the dials according to the material thickness and wire diameter. The digital display provides real-time feedback.
- Press the torch trigger to start welding. The machine's inverter control ensures a stable arc and minimal spatter.
Video 4.1: This video demonstrates the MIG welding process using a similar 3-in-1 welding machine. It shows the setup, parameter adjustment, and actual welding operation, highlighting the smooth arc and minimal spatter.
Video 4.2: A detailed demonstration of how to use the MIG mode on a semi-automatic welder. It covers the steps from wire feeding to adjusting current and voltage for optimal welding results.
Video 4.3: This video illustrates the semi-automatic welding process, focusing on the inverter technology that provides stable current and reduces spatter, leading to cleaner welds.
4.3 MMA (Arc) Welding
- Connect the electrode holder and earth clamp as described in Section 3.2.
- Select "MMA" mode on the control panel.
- Adjust the welding current using the dial based on the electrode type and material thickness.
- Strike the arc on the workpiece. The "Hot Start" function assists in quick arc ignition.
Figure 4.2: The GZ GUOZHI MIG-135LCD configured for MMA (Arc) welding, demonstrating its dual functionality.
4.4 Adjusting Settings
The machine features separate dials for current and voltage adjustment, allowing for fine-tuning of welding parameters. Refer to welding charts for recommended settings based on material type and thickness.
Figure 4.3: Close-up of the control panel showing the digital display and adjustment dials for precise control over welding parameters.
5. Maintenance
- Regular Cleaning: Keep the machine clean and free from dust and debris. Use compressed air to clean the cooling vents periodically.
- Check Cables and Connections: Regularly inspect all cables, connections, and the torch for wear, damage, or loose connections. Replace damaged parts immediately.
- Wire Feeder Maintenance: Clean the wire feeder rollers and guides to ensure smooth wire feeding. Check for any blockages in the torch liner.
- Storage: Store the welding machine in a dry, clean environment when not in use.
Figure 5.1: The internal forced air cooling fan helps maintain optimal operating temperature and prevents overheating, contributing to the machine's longevity.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to the machine | Power cord not connected, power switch off, circuit breaker tripped. | Check power cord, turn on switch, reset circuit breaker. |
| No arc ignition (MMA) | Poor ground connection, incorrect current setting, wet electrode. | Ensure good ground contact, adjust current, use dry electrodes. |
| Wire not feeding (MIG) | Wire tangled, tension too loose/tight, clogged torch liner, incorrect guide roller. | Check wire spool, adjust tension, clean liner, ensure correct guide roller (0.8mm/1.0mm). |
| Excessive spatter | Incorrect voltage/current, improper stick-out, dirty workpiece. | Adjust settings, maintain proper stick-out, clean workpiece. |
| Overheat indicator on | Machine overheated due to prolonged use or blocked vents. | Allow machine to cool down. Ensure vents are clear. Reduce duty cycle. |
7. Specifications
| Feature | Specification |
|---|---|
| Brand | GZ GUOZHI |
| Model | MIG-135LCD |
| Product Dimensions | 33.1 x 14.8 x 23.4 cm |
| Body Weight | Approx. 4.54 kg |
| Color | Black |
| Welding Modes | MMA (Arc Welding), MIG (Non-Gas Wire Welding) |
| Rated Input Voltage | 100V (for both MMA and MIG) |
| Rated Input Current (MMA) | 75A |
| Rated Input Current (MIG) | 100A |
| Rated Frequency | 50/60 Hz |
| Rated Input (KVA) (MMA) | 2.8 |
| Rated Input (KVA) (MIG) | 3.1 |
| Rated Output Current (MMA) | 40-75A |
| Rated Output Current (MIG) | 40-100A |
| Output Current Range | 40-135A |
| Max No-Load Voltage | 65V |
| Rated Duty Cycle | 60% |
| Cooling Method | Forced Air Cooling |
| Included Accessories | Electrode holder, Earth clamp, Torch cord |
8. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official GZ GUOZHI website. Keep your purchase receipt as proof of purchase.