How is GTAW equipment set up, including the torch, power supply, and cable arrangement?

How is GTAW equipment set up, including the torch, power supply, and cable arrangement?

• A. MIG gun.
• B. Oxy-acetylene torch.
• C. TIG torch with a gas nozzle; shielding gas to source; AC for aluminum or DCEN/DCEP for steel; tungsten in collet; ground clamp; organized cables.
• D. No equipment setup is needed.

Answer: (C)

GTAW setup centers on a TIG torch that delivers shielding gas to the weld and a regulated power source that drives current through a tungsten electrode into the work. The torch includes a gas nozzle and holds a tungsten electrode in a collet, with shielding gas (typically argon) routed from a bottle through the hose to protect the arc and weld pool. For aluminum, the power supply runs AC with the right balance and often a high frequency start to help cleaning action and arc stability; for steel, use direct current with the electrode negative (DCEN) or positive (DCEP) depending on the desired heat distribution and cleaning needs. The workpiece is connected to the circuit through a ground clamp, providing the return path for current. Cables and hoses should be arranged neatly and secured to avoid tangling, interference with the arc, and safety hazards.

GTAW setup centers on a TIG torch that delivers shielding gas to the weld and a regulated power source that drives current through a tungsten electrode into the work. The torch includes a gas nozzle and holds a tungsten electrode in a collet, with shielding gas (typically argon) routed from a bottle through the hose to protect the arc and weld pool. For aluminum, the power supply runs AC with the right balance and often a high frequency start to help cleaning action and arc stability; for steel, use direct current with the electrode negative (DCEN) or positive (DCEP) depending on the desired heat distribution and cleaning needs. The workpiece is connected to the circuit through a ground clamp, providing the return path for current. Cables and hoses should be arranged neatly and secured to avoid tangling, interference with the arc, and safety hazards.