Design and function
TIG welding
099-004846-EW501
8.01.2014
55
5.8.3
TIG arc ignition
5.8.3.1
Liftarc ignition
Figure 5-19
The arc is ignited on contact with the workpiece:
a) Carefully place the torch gas nozzle and tungsten electrode tip onto the workpiece and press the torch
trigger (liftarc current flowing, regardless of the main current set).
b) Incline the torch over the torch gas nozzle to produce a gap of approx. 2-3 mm between the electrode
tip and the workpiece. The arc ignites and the welding current is increased, depending on the
operating mode set, to the ignition or main current set.
c) Lift off the torch and swivel to the normal position.
Ending the welding process: Release or press the torch trigger depending on the operating mode
selected.
5.8.4
TIG automatic cut-out
NOTE
The welding machine ends the ignition process or the welding process with an
• ignition fault (no welding current flows within 5 s after the start signal)
• arc interruption (arc is intrerupted for longer than 5 s)
Summary of Contents for Phoenix Expert drive 4L M3.70
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