1. Introduction
This user manual provides comprehensive instructions for the safe and effective operation, setup, maintenance, and troubleshooting of your ANDELI TIG-205 Pro AC/DC Aluminum TIG Welder. The TIG-205 Pro is a versatile 10-in-1 multiprocess welding machine designed for precision welding on various materials including aluminum, carbon steel, stainless steel, and titanium.
It combines multiple welding functions such as AC+DC TIG, Stick (MMA), DC TIG, DC PULSE TIG, AC TIG, AC PULSE TIG, Lift TIG, AC Cold welding, DC Cold welding, and Spot Welding. Featuring a 4.3-inch large LCD digital display, this machine offers intuitive control and clear parameter visibility for both beginners and experienced professionals.
2. Safety Instructions
Always prioritize safety when operating welding equipment. Failure to follow these instructions can result in serious injury or death.
- Personal Protective Equipment (PPE): Always wear a welding helmet with appropriate shade, welding gloves, protective clothing (flame-resistant), and safety shoes.
- Ventilation: Ensure adequate ventilation in the welding area to disperse fumes and gases. If natural ventilation is insufficient, use local exhaust ventilation.
- Electrical Safety: Connect the machine to a properly grounded power source. Do not operate the welder in wet conditions. Never touch live electrical parts.
- Fire Prevention: Keep flammable materials away from the welding area. Have a fire extinguisher readily available. Welding sparks can travel.
- Arc Rays: Welding arc rays can cause eye and skin burns. Protect yourself and bystanders.
- Gas Cylinders: Handle gas cylinders with care. Secure them to prevent falling. Ensure proper gas type for the welding process.
3. Product Overview
3.1. Components
The ANDELI TIG-205 Pro package typically includes the main welding unit, TIG torch, ground clamp, foot pedal, and welding gloves. Familiarize yourself with all components before operation.

Image: The ANDELI TIG-205 Pro welding machine shown with a pair of included welding gloves.

Image: The TIG-205 Pro welder displayed with its various accessories, including the foot pedal, TIG torch components, and ground clamp.

Image: A close-up view of the white and grey ANDELI welding gloves, designed for protection during welding operations.
3.2. Control Panel and Display
The TIG-205 Pro features a 4.3-inch large LCD digital display that provides clear visibility of all welding parameters. The intuitive interface allows for easy selection of welding modes, 2T/4T settings, and workpiece thickness by rotating and pressing the control knobs.

Image: A visual comparison highlighting the large 4.3-inch LCD display of the TIG-205 Pro, showing its advantage over smaller, less informative displays.
The machine also includes a powerful memory function, allowing you to save up to 10 presets for consistent welding results across different projects.

Image: The LCD display showing the powerful memory function, which allows users to save and recall up to 10 welding parameter presets.
Professional parameter settings, including frequency and duty cycle, can be precisely adjusted via the display to meet specific welding needs.

Image: The LCD display illustrating the professional parameter settings, including adjustments for pulse frequency and current, for precise welding control.
4. Setup
- Power Connection: Connect the welder to a suitable 110V or 220V AC power supply. The machine automatically detects the input voltage. Ensure the power source is capable of handling the machine's maximum current draw.
- Ground Clamp Connection: Attach the ground clamp securely to the workpiece or a clean, bare metal part of the welding table. A good ground connection is crucial for stable arc and safe operation.
- TIG Torch and Gas Connection: Connect the TIG torch to the appropriate port on the front panel. Connect the gas hose from your argon cylinder to the gas inlet on the machine. Ensure all connections are tight to prevent gas leaks. For cold welding and TIG processes, pure argon gas is required.
- Foot Pedal Connection (Optional): If using the foot pedal for remote current control, connect it to the designated port on the machine.
- Electrode Installation: Install the correct size and type of tungsten electrode into the TIG torch collet. Ensure the electrode is properly sharpened for optimal arc stability.
5. Operating
5.1. Power On and Initial Settings
Turn on the main power switch located on the rear of the machine. The LCD display will illuminate. Use the control knobs to navigate the menu and select your desired welding mode (e.g., AC TIG, DC TIG, MMA, Cold Welding).
5.2. Welding Modes and Parameters
The TIG-205 Pro offers a wide range of welding modes to suit various applications and materials:
- AC+DC TIG: Combines both AC and DC TIG capabilities for maximum versatility.
- Stick (MMA): For traditional stick welding with coated electrodes.
- DC TIG: Ideal for welding stainless steel, carbon steel, copper, and titanium.
- DC PULSE TIG: Provides better control of heat input, reducing distortion and improving weld pool fluidity for DC TIG applications.
- AC TIG: Specifically for welding aluminum and magnesium alloys.
- AC PULSE TIG: Offers enhanced heat control for AC TIG welding, preventing burn-through on thin materials.
- Lift TIG: A non-high frequency start option for TIG welding.
- AC Cold Welding & DC Cold Welding: Specialized modes designed to minimize heat input, reducing deformation and discoloration. Ideal for thin materials and molds. Requires pure argon.
- Spot Welding: For precise, timed spot welds.

Image: A graphic illustrating the 10 different welding modes available on the ANDELI TIG-205 Pro, including various TIG, Cold, Spot, and Stick welding options.
Waveforms: For AC TIG welding, you can select different waveforms:
- SQUAREWAVE: Provides a stable dynamic arc and forms a stable molten pool.
- SINE WAVE: Offers lower noise decibels for a quieter welding process.
- TRAPEZOIDAL WAVE: Characterized by low heat output, suitable for rapid prototyping when welding thin plates.
Pulse TIG: When enabled, Pulse TIG allows for precise heat control, reducing distortion, preventing burn-through, and improving weld pool fluidity. When Pulse is OFF, it provides simpler operation and faster travel speeds on thicker materials or when maximum arc force is needed.
2T/4T Settings:
- 2T (Two-Touch): Press and hold the torch trigger to weld, release to stop. Ideal for short welds and household tasks.
- 4T (Four-Touch): Press and release to start, press and release again to stop. Suitable for long runs and professional applications, reducing hand fatigue.

Image: A visual guide to the different AC waveforms (Trapezoidal, Square, Sine) and an explanation of the 2T/4T trigger settings for the welding torch.
5.3. Cold Welding
The Cold Welding mode is designed to minimize heat input, which significantly reduces material deformation and discoloration. When welding aluminum or stainless steel in this mode, the resulting weld color is typically silver-white. This mode is particularly effective for delicate materials, thin plates, and mold repair. Always ensure you are using pure argon gas for optimal results in cold welding.

Image: Examples of TIG Aluminum Welding and Cold Welding, showing typical parameters for stainless steel (1mm) and aluminum (5mm) applications.
6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your welding machine.
- Cleaning: Regularly clean the machine's exterior, especially the ventilation openings, to prevent dust and debris buildup which can hinder cooling. Use a dry, clean cloth.
- Cable and Connection Inspection: Before each use, inspect all cables, connections, and the TIG torch for any signs of wear, damage, or loose connections. Replace damaged components immediately.
- Tungsten Electrode Maintenance: Ensure your tungsten electrodes are clean and properly sharpened. Replace worn or contaminated electrodes.
- Gas System Check: Periodically check gas hoses and fittings for leaks. Ensure the gas cylinder is securely stored and the regulator is functioning correctly.
- Storage: Store the welder in a dry, clean, and well-ventilated area, away from direct sunlight and extreme temperatures.
7. Troubleshooting
If you encounter issues with your ANDELI TIG-205 Pro, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Machine does not power on | No power supply; Power switch off; Circuit breaker tripped | Check power cord connection; Turn on power switch; Reset circuit breaker |
| No arc or unstable arc | Poor ground connection; Incorrect gas flow; Contaminated/worn electrode; Incorrect parameters | Ensure ground clamp is secure and on clean metal; Check gas cylinder and flow rate; Clean or replace tungsten electrode; Adjust welding parameters on LCD |
| Poor weld quality (porosity, discoloration) | Insufficient shielding gas; Contaminated material; Incorrect travel speed/amperage | Increase gas flow; Clean workpiece thoroughly; Adjust amperage and travel speed; Ensure pure argon for TIG/Cold welding |
| Overheating/Machine shuts down | Exceeded duty cycle; Blocked ventilation; High ambient temperature | Allow machine to cool down; Clear ventilation openings; Operate in a cooler environment |
If the problem persists after attempting these solutions, or if an error code appears on the display, please contact ANDELI customer support.
8. Specifications
- Model: TIG-205 PRO
- Input Voltage: 110V/220V Dual Voltage
- Max Amperage: 205 Amp
- Welding Processes: AC+DC TIG, Stick (MMA), DC TIG, DC PULSE TIG, AC TIG, AC PULSE TIG, Lift TIG, AC Cold Welding, DC Cold Welding, Spot Welding
- Display: 4.3-inch Large LCD Digital Display
- Applicable Materials: Aluminum, Carbon Steel, Stainless Steel, Titanium
- Features: Pulse TIG, Square/Sine/Trapezoidal Waveforms, 2T/4T Control, Memory Function
- ASIN: B0FHJQXQG1
- Date First Available: December 3, 2024
9. Warranty and Support
This ANDELI product is covered by a manufacturer's warranty. Please refer to the warranty card or documentation included with your purchase for specific terms, conditions, and duration of the warranty.
For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact ANDELI customer service. You can typically find contact information on the official ANDELI website or through the retailer from whom you purchased the product. Please have your product model and serial number ready when contacting support.




