Lift TIG (also called “lift arc”) is a way of starting the arc in TIG (GTAW) welding: the tungsten electrode touches the workpiece, and the instant it’s lifted away, the machine senses the separation and ramps current up from a low sensing current to full welding current. A “lift TIG welder” is simply a TIG or multi-process machine equipped with this arc-start feature — it’s the same technology, just described from the tool side rather than the technique side.
How It Works
- Turn on TIG mode and argon shielding gas.
- Touch the tungsten electrode lightly to the workpiece.
- Lift the torch slightly.
- The machine senses the separation and ramps current up to full welding current.
- Hold the tungsten near the workpiece and weld normally.
How It Compares to Other Arc-Start Methods
| Arc-start method | How it starts | Advantages | Drawbacks |
|---|---|---|---|
| Lift TIG (Lift Arc) | Touch, then lift | Lower cost, relatively clean start, doesn’t generate high-frequency electromagnetic interference | Requires contact with the workpiece; slight tungsten contamination risk |
| Scratch Start | Scratched across the workpiece like striking a match | Simplest, lowest-cost equipment | Prone to contaminating the tungsten; unstable start, can scratch the surface |
| High Frequency (HF) | No contact — a high-voltage spark jumps the gap | Cleanest start, minimal tungsten wear | More expensive equipment; HF signal can interfere with nearby sensitive electronics |
Lift TIG is a clear step up from scratch start: because the machine limits current during the contact phase, there’s much less risk of the tungsten sticking to or contaminating the workpiece.
Where You’ll Find It — and When to Choose Something Else
Lift TIG shows up most often on multi-process machines (MIG/Stick/TIG combo units), and it’s the practical choice in settings where high-frequency interference is a real concern — near hospitals, server rooms, or CNC equipment — as well as for budget-conscious or field-repair setups. It’s most common in DC TIG welding of steel and stainless steel.
For aluminum, HF start combined with AC current is generally the better choice — lift TIG is less commonly used there. If you’re shopping for a welder rather than learning the technique, know that lift TIG is typically standard equipment on multi-process machines, while HF start tends to appear on higher-end or TIG-dedicated machines.
Related reading: Can You Weld Grade 8 Bolts?
