Design and function
Welding parameters
099-002025-EW501
29.11.2017
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5.2.5
Double arc
When the current load is too high or the torch held at too steep an angle, a second arc will form between
workpiece and plasma nozzle.
When the current load is too high or the torch held at too steep an angle, the nozzle service life
will decrease significantly.
Figure 5-3
5.2.6
Grinding the electrode
The electrodes for plasma welding should be grinded mechanically. This will increase the electrode
service life and the welding result will become reproducible.
The grinding angle for cathode welding is 30° (setting angle 15°).
The anode electrode, whose tip is balled or semispherical during operation, is pre-grinded with a bevel of
about 1 mm and at a bevel angle of 45°. It will develop its final form for welding after brief loading in the
higher current range (approx. 35 A)
The regrinding lengths depend on the maximum current load.
The following applies: The lower the actual current load during operation, the more frequently you can
regrind an electrode.
