Lift-Arc™ Tig With Auto-Stop™ And Auto-Crater - Miller Big Blue Duo Pro 700 X Owner's Manual

6-8. Lift-Arc™ TIG With Auto-Stop™ And Auto-Crater™
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Arc Start With Lift-Arc
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Arc End With Auto-Stop
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Arc End With Auto-Crater
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OM-282302 Page 46
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Complete Parts List is available at www.MillerWelds.com
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Arc Start With Lift-Arc TIG
Lift-Arc is used for the DCEN GTAW process
when HF Start method is not permitted.
Select Lift-Arc at Process/Contactor switch.
Turn gas on.
1. Touch or scratch.
2. Lift at any angle.
Touch tungsten electrode to workpiece at
weld start point. Slowly lift electrode. Arc is
started when electrode is lifted.
Maintain shielding gas coverage and elimi-
nate tungsten and workpiece contamination
by using Auto-Crater or Auto-Stop to end the
arc.
Arc End With Auto-Stop
1. While welding.
2. Lift torch to start Auto-Stop. Arc stops.
3. Move torch back down to maintain gas
coverage and prevent contamination.
Arc End With Auto-Crater
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Remote control is not needed when us-
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ing Auto-Crater.
1. While welding.
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2. Lift torch slightly to start Auto-Crater end
(current is reduced).
3. Lower torch. Weld current ramps down.
4. Shielding gas continues until shut off.
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Miller recommends Hobart filler metals.