Miller Electric Big Blue 400 KX Lift-ArcStart Procedure, Lift-Arc Start Method Touch, Application

6-4. Lift-Arc™Start Procedure

Lift-Arc Start Method

1 2

“Touch”	1 − 2
	Seconds

Do NOT Strike Like A Match!

Notes

Lift-Arc t TIG

With Lift-ArctTIG selected, start arc as follows:

1TIG Electrode

2Workpiece

Turn gas on. Touch tungsten electrode to workpiece at weld start point. Hold electrode to workpiece for 1-2 seconds, and slowly lift electrode. Arc is formed when electrode is lifted.

Normal open-circuit voltage is not present before tungsten electrode touches workpiece; only a low sensing voltage is present between electrode and workpiece. The solid-state output contactor does not energize until after electrode is touching workpiece. This allows electrode to touch workpiece without overheating, sticking, or be- ing contaminated.

Application:

Lift-Arc is used for the DCEN GTAW process when HF Start method is not permitted, or to replace the scratch method.

Work like a Pro!

Pros weld and cut safely. Read the safety rules at the beginning of this manual.

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