X8 MIG WELDER 2.5 Operation
• Stop level: the level on which the Crater Fill is finished.
When the 4T Timer is in use, pressing the trigger (in the case of WP Switch, > 0.5 s) launches
the Crater Fill sequence, and the sequence lasts at least for the period of time defined for the 4T
Timer, even if the trigger is released before that time has passed.
Pregas
The Pregas function ensures that the work piece is protected by shielding gas at the moment of
the arc ignition so that the molten metal does not come into contact with air. This is essential with
materials that require a good gas shield, like stainless steels, aluminium and titanium.
When the 2T trigger logic is in use, the Pregas lasts for the defined period of time. When the 4T
or WP Switch trigger logic is in use, the Pregas lasts until the trigger is released.
To adjust the pregas time, in Control Pad, go to Settings > Start and stop logic > Pregas time.
Postgas
The Postgas functions ensures that the work piece is protected by gas after the arc is switched
off so that the molten metal does not come into contact with air. The workpiece is protected by
shielding gas until it has sufficiently cooled down. This is especially useful with materials that
require excellent gas shield, like stainless steels and titanium.
When the 2T trigger logic is in use, the Postgas lasts for the predefined period of time. When the
4T or WP Switch trigger logic is in use, the Postgas lasts until the trigger is released; however, at
least for the predefined period of time.
To adjust the Postgas function, go to Settings > Start and stop > Postgas. Select Set time >
Postgas time to define the period of time that the Postgas lasts, or Set to default to select the
pre-set time.
Creep start
P
The Creep start function defines the wire feed speed before the welding arc ignites, that is, before
the filler wire comes in contact with the workpiece. When the arc ignites, the wire feed speed is
automatically switched to the normal user-set speed. The Creep start function is always on.
To adjust the Creep start level, in Control Pad, go to Settings > Start and stop logic > Creep
start level. The adjustment range is 10%...90%.
Figure 47: Creep start
WF end step
Immediately after the arc is switched off, the wire feeder feeds a few extra millimeters of filler wire,
so that the wire does not stick into the contact tip.
OPERATING MANUAL | EN 155
©
KEMPPI 2017 | 1817
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