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5 OPERATION
Overheating protection
The welding power source has overheating protection that trips if the temperature becomes
too high. When this occurs, the welding current is interrupted and an overheating indication
lamp is lit.
The overheating protection resets automatically when the temperature has fallen back to the
normal working temperature range.
Arc force
The arc force is important in determining how the current changes in response to a change in
the arc length. A lower value gives a calmer arc with less spatter.
It only applies to SMAW welding.
Inductance
Higher inductance results in a wider weld pool and less spatter. Lower inductance produces
a harsher sound, but a stable, concentrated arc.
It only applies to GMAW welding.
GTAW welding
GTAW welding melts the metal of the workpiece, using an arc struck from a tungsten
electrode that does not itself melt. The weld pool and electrode are protected by shielding
gas.
"Live TIG-start"
At a "Live TIG-start", the tungsten electrode is placed against the workpiece. When the
electrode is lifted away from the workpiece, the arc is struck at a limited current level.
For GTAW welding, the welding power source must be supplemented with:
•
a TIG torch with gas valve
•
Argon gas cylinder
•
Argon gas regulator
•
Tungsten electrode
Arc air gouging
For arc air gouging, a special electrode is used comprised of a carbon rod with a copper
casing.
0463 730 001
MMA welding
Wire feed unit
Mobile feed CV
(Constant voltage)
- 22 -
MIG/MAG welding
Protective ground
© ESAB AB 2021
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