Telwin Tecnica 188 MPGE Inverter Electrode Welder 230V User Manual

1. Introduction

This manual provides essential information for the safe and effective use of your Telwin Tecnica 188 MPGE Inverter Electrode Welder. The Tecnica 188 MPGE is a direct current (DC) MMA and TIG inverter welding machine designed for scratch striking. It is compatible with a wide range of electrodes, including rutile, basic, stainless steel, and cast iron. This model is recommended for use with motor-generators, offering high performance even with unstable power supply, thanks to its MPGE multiprotections.

Please read this manual thoroughly before operating the equipment and keep it for future reference.

2. Safety Information

Welding operations involve inherent risks. Adherence to safety precautions is crucial to prevent injury or damage to property. Always consult local safety regulations and standards.

• Electric Shock: Welding current can cause fatal electric shock. Ensure proper grounding of the equipment. Wear dry, insulated gloves and protective clothing. Do not touch live electrical parts.
• Fumes and Gases: Welding produces fumes and gases that can be hazardous to health. Work in a well-ventilated area or use local exhaust ventilation. Avoid breathing fumes.
• Arc Rays: Arc rays can burn eyes and skin. Always wear a welding helmet with appropriate filter lenses and protective clothing (long sleeves, heavy pants, leather gloves).
• Fire and Explosion: Welding sparks and hot metal can cause fires or explosions. Keep flammable materials away from the welding area. Have a fire extinguisher readily available.
• Burns: Hot metal and slag can cause severe burns. Wear protective clothing and handle hot materials with appropriate tools.
• Pacemakers: Individuals with pacemakers should consult their doctor before welding. Electromagnetic fields can interfere with pacemakers.

3. Product Overview and Features

The Telwin Tecnica 188 MPGE is a compact and lightweight inverter welding machine designed for versatility and reliability.

Figure 1: Telwin Tecnica 188 MPGE Inverter Electrode Welder. The image displays the red and black welding unit, a black plastic carry case, and the included welding accessories (electrode holder and ground clamp with cables).

Key Features:

• Inverter Technology: Provides stable welding current.
• MMA and TIG Welding: Supports both Manual Metal Arc (MMA) and Tungsten Inert Gas (TIG) welding with scratch striking.
• Wide Electrode Compatibility: Suitable for rutile, basic, stainless steel, and cast iron electrodes.
• MPGE Multiprotections: Includes a waveform control device, filter against input peaks, and oscillation stabilization for high performance with unstable power supplies (e.g., motor-generators).
• Compact and Light Design: Enhances portability and ease of use.
• High Welding Current Stability: Maintains consistent current despite mains voltage fluctuations.
• Integrated Devices: Features Arc Force, Hot Start, and Anti-Stick for improved welding performance.
• Safety Protections: Equipped with thermostatic, overvoltage, undervoltage, and overcurrent protections.
• Included Accessories: Comes complete with MMA welding accessories and a plastic carry case.

4. Setup

Before operating the welder, ensure proper setup to guarantee safety and optimal performance.

1. Unpacking: Carefully remove the welding machine and all accessories from the plastic carry case. Inspect for any shipping damage.
2. Power Connection: Connect the welder to a suitable 230V AC power supply. Ensure the power outlet is properly grounded and can handle the required current (refer to specifications). If using a motor-generator, ensure it meets the power requirements and benefits from the MPGE multiprotections.
3. Ground Clamp Connection: Attach the ground clamp cable to the appropriate terminal on the welding machine (usually marked with a negative (-) symbol or ground symbol). Securely fasten the ground clamp to the workpiece or a clean, bare metal part of the welding table, ensuring good electrical contact.
4. Electrode Holder Connection (MMA): Connect the electrode holder cable to the positive (+) terminal on the welding machine. Insert the desired electrode into the electrode holder.
5. TIG Torch Connection (Optional, for TIG welding): If performing TIG welding, connect the TIG torch to the appropriate terminal (usually negative (-) for DC TIG) and connect the gas hose to a suitable inert gas cylinder (e.g., Argon) with a regulator.
6. Ventilation: Ensure the welding area is well-ventilated to disperse fumes and gases.
7. Personal Protective Equipment (PPE): Always wear appropriate PPE, including a welding helmet, welding gloves, flame-resistant clothing, and safety shoes.

5. Operating Instructions

This section outlines the basic steps for operating the Telwin Tecnica 188 MPGE for MMA and TIG welding.

5.1. MMA (Shielded Metal Arc) Welding

1. Power On: Turn on the welding machine using the main power switch.
2. Select Welding Mode: Ensure the machine is set to MMA mode (if applicable, some machines auto-detect or have a switch).
3. Set Current: Adjust the welding current (amperage) according to the electrode type and diameter, and the thickness of the material being welded. Refer to electrode manufacturer recommendations.
4. Prepare Workpiece: Ensure the workpiece is clean, free of rust, paint, and grease.
5. Strike an Arc: With the welding helmet down, gently scratch the electrode tip against the workpiece to initiate the arc. Once the arc is established, maintain a consistent arc length and travel speed.
6. Weld: Move the electrode along the joint, maintaining the arc and depositing weld metal.
7. Finish: When the weld is complete, break the arc by quickly pulling the electrode away. Allow the weld to cool before handling.

5.2. TIG (Tungsten Inert Gas) Welding (Scratch Start DC)

The Tecnica 188 MPGE supports TIG welding with scratch striking. This method requires careful technique to avoid contaminating the tungsten electrode.

1. Power On and Mode Selection: Turn on the welder and select TIG mode.
2. Gas Flow: Open the gas cylinder valve and set the gas flow rate on the regulator (typically 5-10 liters/minute for Argon).
3. Set Current: Adjust the welding current for TIG welding based on material thickness and tungsten electrode size.
4. Prepare Tungsten: Ensure the tungsten electrode is properly ground to a sharp point.
5. Scratch Start: With the welding helmet down, gently touch the tungsten electrode to the workpiece and quickly lift it a small distance (1-3mm) to establish the arc. Avoid sticking the tungsten to the workpiece.
6. Weld: Maintain a consistent arc length and angle. Feed filler rod into the weld puddle as needed.
7. Finish: Gradually reduce the arc length or quickly pull the torch away to extinguish the arc. Maintain gas flow over the hot tungsten and weld puddle for a few seconds after the arc stops to prevent oxidation.

6. Maintenance

Regular maintenance ensures the longevity and safe operation of your welding machine.

• Cleaning: Periodically clean the exterior of the machine with a dry, soft cloth. Ensure ventilation openings are free from dust and debris. Use compressed air to blow out internal dust if necessary, ensuring the machine is unplugged.
• Cable Inspection: Regularly inspect welding cables, electrode holder, and ground clamp for damage, cuts, or loose connections. Replace damaged components immediately.
• Electrode Holder/TIG Torch: Clean the electrode holder jaws or TIG torch collet and body. Replace worn parts.
• Storage: Store the welding machine in its plastic carry case in a dry, clean environment, away from moisture and extreme temperatures.
• Professional Service: For internal repairs or complex issues, contact qualified service personnel.

7. Troubleshooting

This section addresses common issues you might encounter with your welding machine.

• No Power:
  • Check if the power cable is securely plugged in.
  • Verify the main power switch is in the "ON" position.
  • Check the circuit breaker or fuse in your electrical panel.
• No Arc / Difficulty Striking Arc:
  • Ensure the ground clamp has good contact with clean, bare metal on the workpiece.
  • Check that the electrode is properly inserted into the holder and is suitable for the material.
  • Verify welding current settings are appropriate.
  • For TIG, ensure gas flow is correct and tungsten is clean and sharpened.
• Poor Weld Quality:
  • Adjust welding current, arc length, and travel speed.
  • Ensure the workpiece is clean.
  • Use the correct type and size of electrode for the application.
  • For TIG, check gas shielding and tungsten condition.
• Overheating / Thermal Protection Activated:
  • The machine's thermostatic protection may have activated. Allow the machine to cool down.
  • Ensure adequate ventilation around the machine.
  • Reduce the duty cycle or welding current if continuously welding at high amperages.

If problems persist after following these steps, contact Telwin customer support or a qualified service technician.

8. Specifications

9. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or visit the official Telwin website. Keep your proof of purchase for warranty claims.

Manufacturer: Telwin