Functional characteristics
TIG welding
Item No.: 099-005073-EWM01
57
5.3
TIG welding
5.3.1
TIG welding task selection
• Select JOB 250 (TIG welding task).
It is only possible to change the JOB number when no welding current is flowing.
On decompact welding systems, the "JOB list" sticker is located on the inside on the wire feed unit cover;
with compact machines it is on the right-hand power source cover.
Operating
element
Action Result
Display
1 x
Select JOB number input
comes on
m/min
Set the JOB number
The machine adopts the required setting after
approx. 3 seconds
5.3.2
TIG welding current setting
The welding current is normally set using the “Wire speed” rotary dial.
m/min
Welding current is set
The welding current
and voltage change
depending on the
setting
5.3.3
TIG arc ignition
5.3.3.1
Liftarc
a)
b)
c)
Figure 5-29
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.
