Kemppi KempArc DT400 - Manual (Page 14)

EN
2.2.5 selection of liquid- or gas-cooled mig gun
You can select a MIG gun cooled with liquid or gas by pressing buttons P3 and P4
simultaneously and holding them down for at least one second.
• When the display reads GAS, you can use a gas-cooled MIG gun with the equipment.
• When the display reads COOLEr, you can use a liquid-cooled MIG gun with the equipment.
You can change the gun selection by pressing buttons P3 and P4 again, as above. With a
liquid-cooled gun selected, the liquid cooling function is started when the power source is
started the next time.
2.2.6 retrieving weld data
The weld data function allows you to return to the welding current and voltage used during
the previous session, with the weld data feature. To use the feature, press buttons P4 and P5
simultaneously.
2.2.7 selecting the welding process
The welding process selector button P9 allows you to select the welding process you want to
use. You can select one of the following processes:
• normal MIG welding
• 1-MIG welding
• AAA-MIG (optional)
In normal MIG welding, the wire feed speed and welding voltage are adjusted separately.
Unlike the above, the 1-MIG and AAA-MIG processes are synergetic welding processes where
the welding voltage and other welding parameters are interconnected so that the welding
power and arc length are adjusted to attain optimal welding values.
The AAA-MIG process is an optional feature intended for welding automation. It must be
acquired separately and is therefore not available in all configurations.
2.2.8 Additional mig features included in the standard delivery
The standard welding machine delivery includes three additional MIG features that facilitate
welding and improve weld quality. These additional features are creep start, hot start and
crater fill.
To use an additional MIG feature, press the feature selector button P10. Press the selector
button repeatedly to use one or several features. Only the additional features allowed for the
welding method you have chosen will be available.
Creep start
The purpose of the creep start feature is to make controlled weld start easier and smoothen
the initial stage of welding, for example when welding with high wire feed speeds. At the
beginning, the machine will use a slow wire feed speed until the wire touches the work piece
and the current starts flowing.
Creep start is available for normal MIG welding and the synergetic 1-MIG welding.
Hot start
The purpose of hot start is to reduce start faults, for example when welding aluminium or
other materials with particularly good thermal conductivity. In this scenario, there is a fixed
pre-gas time at the beginning of the welding, after which the welding power briefly rises
above the specified power level. The power and time parameters for hot start can be specified
in the SETUP settings.
Hot start is available for synergetic 1-MIG welding.
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