Design and function
Plasma welding
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099-007033-EW501
4.1.2022
5.2 Plasma welding
5.2.1 Welding task selection
The basic prerequisite for starting the plasma process is a connected and functioning cooling
circuit for cooling of the welding torch.
5.2.1.1 Setting welding procedure
Figure 5-12
5.2.2 Pilot arc
Ignite pilot arc
Figure 5-13
Switching off the pilot arc
The pilot arc must be switched off and the gas post flow time (plasma gas) waited for before
switching off the welding machine. If the welding machine is switched off prematurely the tung-
sten electrode loses its jacket of shielding gas and will consequently oxidise.
• Switch off the pilot arc before switching off the welding machine!
• Wait until the welding torch has cooled down.
Figure 5-14
