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© ESAB AB 2021
11. Arc control (inductance)
The arc control operates in MIG mode only and is used to adjust the intensity of the welding
arc. Lower arc control settings make the arc softer with less weld spatter. Higher arc control
settings give a stronger driving arc which can increase weld penetration. Soft means
maximum inductance while Hard means minimum inductance.
12. Trigger mode control (MIG and LIFT TIG welding processes)
The trigger mode control is used to switch the functionality of the of the torch trigger between
2T (normal) and 4T (latch mode).
2T (Normal mode)
In this mode, the torch trigger must remain depressed for the welding output to be active.
Press and hold the torch trigger to activate the power source (weld). Release the torch trigger
switch to cease welding.
4T (Latch mode)
This mode of welding is mainly used for long welding runs to reduce operator fatigue. In this
mode the operator can press and release the torch trigger and the output will remain active.
To deactivate the power source, the trigger switch must again be depressed and released,
thus eliminating the need for the operator to hold the torch trigger.
13. Process selection control
The process selection control is used to select the desired welding mode. Three modes are
available, MIG (GMAW/FCAW), LIFT TIG (L-GTAW) and MMA (SMAW) modes. See the
following sections: "Setup for MIG (GMAW) welding with gas shielded MIG wire", "Setup for
MIG (FCAW) welding with flux core (gasless) wire", "Setup for LIFT TIG (L-GTAW) welding",
"Setup for MMA (SMAW) welding".
Note that when the unit is powered OFF the mode selection control will automatically default
to MIG mode. This is necessary so as to prevent inadvertent arcing should an electrode
holder be connected to the unit and mistakenly be in contact with the work piece during
power up.
14. Digital voltage meter (Left Side LED Display)
MIG Welding process
This digital meter is used to display the pre-set (preview) voltage in MIG mode and actual
welding voltage of the power source when welding. At times of non-welding, the digital meter
will display a pre-set (preview) value of voltage. This value can be adjusted by varying the
multifunction control knob (10).
MMA and LIFT TIG Welding processes
This digital meter is used to display the welding output terminal voltage in MMA / LIFT TIG
modes during non-welding or welding. This value cannot be adjusted by varying the
multifunction control knob (10).
When welding, this digital meter will display actual welding voltage in all modes. At the
completion of welding, the digital meter will hold the last recorded voltage value for a period
of approximately 10 seconds in all modes. The voltage meter will hold the value until; (1) any
of the front panel controls are adjusted in which case the unit will revert to preview mode, (2)
welding is recommenced, in which case actual welding amperage will be displayed, or (3) a
period of 10 seconds elapses following the completion of welding in which case the unit will
return to preview mode.
NOTE!
The preview functionality provided on this power source is intended to act as a
guide only. Some differences may be observed between preview values and
actual welding values due to factors including the mode of welding, differences
in consumables/gas mixtures, individual welding techniques and the transfer
mode of the welding arc (dip versus spray transfer). Where exact settings are
required (in the case of procedural work), it is recommended that alternate
measurement methods be utilized to ensure output values are accurate.
