Stick Start Procedure − Scratch Start Technique; Lift-Arct Tig With Auto-Stopt And Auto-Cratert - Miller Big Blue 500 Pro Owner's Manual

6-8. Stick Start Procedure − Scratch Start Technique

6-9. Lift-Arct TIG With Auto-Stopt And Auto-Cratert

Arc Start With Lift-Arc
1
Arc End With Auto-Stop
1
OR
Arc End With Auto-Crater
1
.
Complete Parts List available at www.MillerWelds.com
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With Stick selected, start arc as
follows:
1 Electrode
2 Workpiece
3 Arc
Drag electrode across workpiece like
striking a match; lift electrode slightly
after touching work. If arc goes out
electrode was lifted too high. If
electrode sticks to workpiece, use a
quick twist to free it.
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/Contac-
tor switch.
Turn gas on.
1 Touch or scratch.
2 Lift at any angle.
Touch
workpiece at weld start point.
Slowly lift electrode. Arc is started
when electrode is lifted.
Maintain shielding gas coverage
and eliminate tungsten and work-
piece contamination by using
Auto-Crater or Auto-Stop to end
the arc.
.
See Section 6-5 to adjust
Auto-Stop and Auto-Crater.
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:
.
Remote control is not needed
when using Auto-Crater.
1 While welding.
2 Lift torch slightly to start
4
Auto-Crater end (current is
reduced).
3 Lower torch. Weld current
ramps down.
4 Shielding gas continues until
shut off.
.
Miller recommends Hobart
filler metals.
tungsten electrode to
WM Marketing
OM-278739 Page 37