Lift-Arc Tig Procedure; Section 5 - Maintenance & Troubleshooting; Routine Maintenance - Miller Maxstar 152 Owner's Manual

4-2. Lift-Arc TIG Procedure

SECTION 5 – MAINTENANCE & TROUBLESHOOTING

5-1. Routine Maintenance

1
1 – 2
"Touch"
Seconds
Do NOT Strike Like A Match!
3 Months
Replace
Damaged Or
Unreadable
Labels
6 Months
2
Y Disconnect power
before maintaining.
Blow Out Or
Vacuum Inside
With Lift-Arc Switch in the On posi-
tion, start an arc as follows:
1 TIG Electrode
2 Workpiece
Touch tungsten electrode to work-
piece at weld start point, hold
electrode to workpiece for 1-2
seconds, and slowly lift electrode.
An arc will form 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 with-
out overheating, sticking, or getting
contaminated.
Ref. S-156 279
.
Maintain more often
during severe conditions.
Repair Or
Replace
Cracked
Cables And
Cords
Clean And
Tighten Weld
Connections
Repair Or Replace
Cracked Cables
And Cords
OM-172 200 Page 17