Lift TIG welding refers to a specific and common arc starting technique used in Gas Tungsten Arc Welding (GTAW), also known as TIG welding. This method is particularly user friendly and found on many welding systems.
Unlike traditional scratch-start TIG, where the electrode is literally scratched across the workpiece like a match, Lift TIG minimizes the risk of tungsten contamination and workpiece damage.
How the Lift Start Technique Works
The process for initiating the arc using the Lift TIG method is straightforward and involves a simple sequence of steps:
- Touch the Electrode: The welder begins by gently touching the tungsten electrode directly to the surface of the workpiece.
- Depress the Switch: While the electrode is in contact, the welder depresses the foot pedal or finger switch on the torch. At this point, the machine typically delivers a low-amperage current without establishing a full arc.
- "Lift" the Torch: The welder then smoothly "lifts" the torch and electrode a small distance (usually just a few millimeters) straight up off the workpiece. As the contact breaks, the welding machine senses this and initiates the main welding arc at the desired amperage setting.
This sequence allows the arc to form cleanly without damaging the delicate tungsten tip or leaving unsightly scratch marks on the material being welded.
Advantages of Lift TIG Start
The popularity of the Lift TIG method stems from several key benefits:
- User-Friendly: As highlighted, it's easy to learn and perform, making it suitable for beginners and experienced welders alike.
- Reduced Contamination: By avoiding the scratching motion, the tungsten electrode is less likely to pick up material from the workpiece, keeping the arc stable and the weld clean.
- Cleaner Starts: Prevents scratch marks on the material surface, resulting in a more aesthetically pleasing finish, especially important on visible welds.
- Equipment Compatibility: It is a standard feature on many modern TIG welding power sources.
In summary, Lift TIG is a preferred arc starting technique that provides a clean, controllable, and user-friendly way to begin a TIG weld.
