STAMOS TRON 200 RV Manual De Instrucciones página 109

Bottom View Of Gas Cup
Application:
Lift-Arc is used for the DCEN or AC GTAW process when HF Start method is not permitted, or to
replace the scratch method.
1. Workpiece (make sure workpiece is clean before welding)
2. Work Clamp (place as close to the weld as possible)
3. Torch
4. Filler Rod (if applicable).
5. Gas Cup
6. Tungsten Electrode.
Guidelines: The inside diameter of the gas cup should be at least three times the tungsten
diameter to provide adequate shielding gas coverage.
For example, if tungsten is 1/16 in diameter, gas cup should be a minimum of 3/16 in diameter.
Tungsten extension is the distance the tungsten extends out gas cup of torch. The tungsten
extension should be no greater than the inside diameter of the gas cup. Arc length is the distance
from the tungsten to the workpiece.
9.1.2. Tungsten Without Filler Rod
This is known as Fusion welding where the edges of the metal pieces are melted together using
only the heat and arc force generated by the TIG arc.
• Once the arc is started the torch tungsten is held in place until a weld pool is created, a
circular movement of the tungsten will assist is creating a weld pool of the desired size.
EN