Where the welding current (I
1
) is permanently set, the operating point may migrate along
the characteristics (4), (5) and (6) depending on the welding voltage at that moment in
time. The welding voltage U is dependent upon the arc length.
If the arc length changes, e.g. in accordance with the load line (2), the resulting operating
point will be the point where the corresponding characteristic (4), (5) or (6) intersects with
the load line (2).
Applies to characteristics (5) and (6): Depending upon the welding voltage (arc length),
the welding current (I) will also become either smaller or larger, even though the value
set for I
1
remains the same.
Break-voltage
Welding voltage limitation
Unit -
Setting range OFF or 5 - 90 V
Factory setting OFF
The arc length depends on the welding voltage. To end the welding process, it is usu-
ally necessary to significantly lift the rod electrode away from the workpiece. With the
"Uco" parameter, the welding voltage can be limited to a value that makes it possible
to end the welding operation simply by slightly lifting the rod electrode.
NOTE!
If, during welding, you often find that the welding operation is ended unintention-
ally, increase the value of the Uco parameter.
L/R alignment
L (inductivity) - welding circuit inductivity (in microhenry)
R (resistance) - welding circuit resistance (in mOhm)
See the "L/R alignment" section for further details.
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