5 OPERATION
0463 362 001
- 16 -
© ESAB AB 2013
MMA welding
MIG/MAG welding
Wire feed unit
Mobile feed CV
(Constant voltage)
Protective earth
Voltage reducing device (VRD)
The VRD function ensures that the open-circuit voltage does not exceed 35 V when welding
is not being carried out. This is indicated by a lit VRD led.
The VRD function is blocked when the system senses that welding has started.
Contact an authorised ESAB service technician to activate the function.
Overheating protection
The welding power source has overheating protection that operates 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, within
normal working temperature.
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 MMA 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 MIG/MAG welding.
TIG welding
TIG welding melts the metal of the workpiece, using an arc struck from a tungsten electrode,
which does not itself melt. The weld pool and the 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 workpiece, the arc is struck at a limited current level.
For TIG welding, the welding power source shall be supplemented with:
•
a TIG torch with gas valve
•
an argon gas cylinder
Summary of Contents for Warrior 400
Page 2: ......
Page 21: ...DIAGRAM 0463 362 001 21 ESAB AB 2013 DIAGRAM ...
