PARWELD XTE 171C MIG WELDER

Operation

1. Switch on the machine using the main ON/OFF switch. The green LED will light, and the voltage selector switch becomes active.
2. Select your voltage by turning the “VOLTAGE SELECTOR” to one of the available settings.
3. Check drive rolls and torch parts to ensure they match the wire size and type being used.
4. The optimum wire feed pressure will vary depending on wire type, size, and condition. As a general rule:
   • Hard wires may require slightly greater pressure.
   • Soft or aluminium wires require less pressure than factory settings.
   To test, press the gun against a solid object (isolated from the workpiece) and pull the trigger for a few seconds. Adjust as needed:
   • If wire slips, increase tension slightly.
   • If wire kinks or birds-nests, reduce pressure gradually until feed is smooth.
5. If replacing wire, loosen the adjustment knob about half a turn and refit the wire. Feed forward until a slight waviness appears in the exposed wire — too much tension indicates over-pressure.

Feeding the Welding Wire

1. When the trigger is pulled, both the drive motor and electrode are LIVE. Always treat the torch as live until several seconds after releasing the trigger.
2. Safety Warning: When using an open-arc process, correct eye, head, and body protection must always be worn.
3. Position the wire at the joint, lightly touching the workpiece, and begin welding.
4. Hold the torch 8–10 mm from the contact tip to the workpiece and maintain a steady travel speed.
5. When stopping, release the trigger, pull the torch away, and close the gas valve (if fitted).
6. When welding is complete, purge gas briefly to release pressure and then switch off the machine.

Optimising Weld Parameters

Note: The following settings are guidelines only. Adjustments may be required based on material thickness, wire type, joint design, shielding gas, and torch angle. Always produce test welds before proceeding.

Material Thickness and Amperage

1. Convert material thickness to amperage using the rule: 0.25 mm ≈ 1 Amp
   Example: 3.2 mm steel ≈ 125 A.
2. Select wire size based on amperage:
   • 40 – 145 A → 0.8 mm wire
   • 50 – 180 A → 1.0 mm wire
   • 75 – 250 A → 1.2 mm wire
3. Recommended wire feed speeds per amp:
   • 0.8 mm → 0.05 m/min per Amp
   • 1.0 mm → 0.04 m/min per Amp
   • 1.2 mm → 0.025 m/min per Amp
   Example: for 3.2 mm material at 125 A using 1.0 mm wire, feed rate ≈ 5 m/min.
4. Voltage setting:
   • Low voltage → wire stubs into work
   • High voltage → unstable arc with spatter
   Set midway between high/low values and fine-tune for best results.

Proper setup of amperage, wire feed, and voltage ensures optimum weld penetration, minimal spatter, and a clean bead appearance.