Migatronic Focus TIG 161 DC HP PFC Inverter Welding Machine

1. Introduction and Overview

This manual provides essential information for the safe and effective operation, setup, and maintenance of your Migatronic Focus TIG 161 DC HP PFC Inverter Welding Machine. The Focus TIG 161 DC HP is a first-class single-phase (230 V) TIG DC and MMA inverter welding machine, designed for both mobile mounting tasks and workshop applications. Its compact size and portability make it highly versatile.

Key features include a pulse function for enhanced weld pool control, especially on thin materials, and HF-/lift TIG ignition for various operating conditions. Equipped with Power Factor Correction (PFC), it ensures efficient energy use and allows for higher welding currents with standard 16A fuses. The machine also accommodates a wide mains voltage tolerance, making it suitable for use with long power cables or generators. It supports electrode hand welding with all rutile and basic electrode types.

2. Safety Information

WARNING: Welding can be dangerous. Always follow safety precautions to prevent serious injury or death.

• Electric Shock: Can kill. Do not touch live electrical parts. Wear dry welding gloves and protective clothing. Insulate yourself from work and ground.
• Fumes and Gases: Can be hazardous to your health. Keep your head out of the fumes. Use ventilation or exhaust to remove fumes from the breathing zone.
• Arc Rays: Can burn eyes and skin. Wear a welding helmet with a proper shade of filter to protect your face and eyes. Wear appropriate protective clothing to protect your skin.
• Fire and Explosion: Welding can cause fire or explosion. Keep flammables away from welding area. Have a fire extinguisher nearby.
• Hot Parts: Can cause severe burns. Allow hot parts to cool before handling.
• Noise: Excessive noise can damage hearing. Wear ear protection.
• Always read and understand the entire manual before installation and operation.
• Ensure the machine is properly grounded.
• Do not operate the machine in damp or wet conditions.

3. Product Features

• Application: Suitable for stainless steel, steel, and construction steel.
• Current Range: 10-160A, providing versatility for various welding tasks.
• Voltage: Single-phase 1×230V with a wide tolerance range of -40%/+10%.
• Duty Cycle (WIG): 130A at 60% duty cycle at 40°C (15.2V).
• Polarity: DC (Direct Current).
• Open Circuit Voltage: 95 V.
• Safety Type: C, 16A fuse requirement.
• Protection Class: IP23S, offering protection against solid objects and spraying water.
• Welding Process: Pulsed WIG (TIG) for enhanced control and quality.
• Power Factor Correction (PFC): Maximizes energy efficiency and allows for higher welding current on a standard fuse.
• HF-/Lift TIG Function: Provides flexible ignition options (with or without high frequency).
• MMA Welding Capability: Also suitable for manual metal arc welding with various electrode types.
• Included Components: Comes with a carry strap for portability.

4. Components and Controls

Figure 4.1: Overall view of the Migatronic Focus TIG 161 DC HP PFC welding machine, showing the main unit, TIG torch, and ground clamp. The machine features a robust green casing with a control panel on the front.

Figure 4.2: Detailed view of the machine's control panel. It includes a digital display for current settings, various indicator lights, and control buttons for different welding parameters and modes. The large green knob is for adjusting the welding current.

Figure 4.3: Schematic diagram of the control panel, illustrating the various symbols and their corresponding functions. This includes settings for pre-gas, start current, up-slope, main current, down-slope, end current, and post-gas, along with indicators for voltage, current, and percentage settings.

Figure 4.4: The Migatronic Focus TIG 161 DC HP PFC machine in a workshop setting, demonstrating its compact size and portability while a welder performs TIG welding. This image highlights the practical application of the machine.

4.1. Front Panel Controls:

• Digital Display: Shows welding current, voltage, or parameter settings.
• Current Adjustment Knob: Large green knob for precise control of welding current.
• Mode Selection Buttons: For switching between TIG DC, MMA, and pulse functions.
• Parameter Adjustment Buttons: For fine-tuning pre-gas, post-gas, up-slope, down-slope, and pulse frequency.
• Torch Connection: Receptacles for connecting the TIG torch.
• Ground Clamp Connection: Receptacle for connecting the ground cable.

5. Setup

1. Unpacking: Carefully remove the welding machine and all accessories from the packaging. Inspect for any shipping damage.
2. Placement: Place the machine on a stable, level surface, ensuring adequate ventilation around the unit. Do not block air inlets or outlets.
3. Power Connection: Connect the machine to a suitable 230V single-phase power supply. Ensure the power outlet is properly grounded and protected by a 16A fuse.
4. Gas Connection (TIG): Connect the argon gas cylinder regulator to the gas inlet on the rear of the machine using a gas hose. Ensure all connections are tight to prevent leaks.
5. TIG Torch Connection: Connect the TIG torch cable to the appropriate receptacle on the front panel. Ensure the gas line and control cable from the torch are also securely connected.
6. Ground Clamp Connection: Connect the ground cable to the ground clamp receptacle on the front panel. Attach the ground clamp securely to the workpiece or welding table, ensuring good electrical contact.
7. Tungsten Electrode Installation: Insert a MIGA Super Blue tungsten electrode into the TIG torch collet and tighten the cap. Ensure the electrode is properly sharpened for optimal arc stability.

6. Operating Instructions

6.1. Basic TIG Welding (DC)

1. Power On: Turn on the main power switch on the machine.
2. Select Mode: Press the mode button to select TIG DC welding.
3. Set Current: Adjust the main current knob to the desired amperage for your material thickness and joint type.
4. Gas Flow: Open the gas cylinder valve and set the gas flow rate on the regulator (typically 6-12 liters/minute for TIG).
5. Arc Ignition:
   • HF Ignition: Position the torch over the workpiece. Press the torch trigger to initiate the high-frequency arc.
   • Lift TIG: Touch the tungsten electrode to the workpiece, then lift it slightly to initiate the arc.
6. Welding: Maintain a consistent arc length and travel speed. Feed filler rod into the weld pool as needed.
7. Arc Termination: Release the torch trigger. The post-gas flow will continue for a set time to protect the cooling weld and tungsten.

6.2. Pulse TIG Welding

The pulse function provides better control of the weld pool, reduces heat input, and is ideal for thin materials or positional welding.

1. Select Pulse Mode: After selecting TIG DC, press the pulse button to activate pulse welding.
2. Adjust Pulse Parameters: Use the control panel to set:
   • Peak Current: The higher current during the pulse.
   • Base Current: The lower current between pulses.
   • Pulse Frequency: How many pulses per second.
   • Pulse Width (Duty Cycle): The percentage of time spent at peak current.
3. Proceed with welding as described in Basic TIG Welding.

6.3. MMA (Stick) Welding

1. Select MMA Mode: Press the mode button to select MMA welding.
2. Connect Electrode Holder: Connect the electrode holder cable to the positive (+) terminal and the ground clamp to the negative (-) terminal for most electrodes (check electrode polarity recommendations).
3. Set Current: Adjust the current knob based on the electrode diameter and type.
4. Strike Arc: Lightly scratch the electrode on the workpiece to strike an arc.
5. Weld: Maintain a consistent arc length and travel speed.

7. Maintenance

• Daily:
  • Inspect all cables and connections for damage or wear. Replace if necessary.
  • Check the TIG torch for wear on consumables (collet, collet body, ceramic nozzle, tungsten electrode).
  • Clean the machine's exterior with a dry, soft cloth.
• Weekly/Monthly (depending on usage):
  • Clean the cooling fan and air vents to ensure proper airflow and prevent overheating. Use compressed air if available, ensuring the machine is unplugged.
  • Check gas hose connections for leaks using a leak detection spray.
  • Inspect the ground clamp for good contact surfaces.
• General:
  • Store the machine in a dry, dust-free environment when not in use.
  • Do not attempt internal repairs unless you are a qualified technician. Refer to authorized service centers.

8. Troubleshooting

9. Specifications

10. Warranty and Support

For warranty information, please refer to the documentation provided at the time of purchase or contact your authorized Migatronic dealer. Migatronic products are known for their quality and reliability.

For technical support, spare parts, or service inquiries, please contact your local Migatronic service center or the dealer from whom you purchased the product. Always provide the model number (79510331) and serial number of your machine when seeking support.