Tig Welding, General; Types Of Ignition; Automatic Shut-Off; Digital Display - EWM TRITON 260 DC Operating Instructions Manual

3 Function specification
3.2

TIG welding, general

If welding is performed alternately by different methods, e.g. TIG, MIG/MAG or MMA and if
one or two welding torches and an electrode holder are connected to the machine, the
open-circuit/welding voltage is applied simultaneously to both!
Therefore, always place the torch and the electrode holder on an insulated surface before
starting work and during breaks.
3.2.1

Types of ignition:

HF ignition
The arc is started without contact by high-voltage ignition pulses.
Liftarc
The arc is ignited with contact with the workpiece:
a) The torch gas nozzle must be placed with its rim on the ignition point such that there is a gap of
approx. 2-3 mm between the electrode tip and the workpiece.
b) Carefully touch the workpiece with Tungsten electrode tip. Press torch trigger in accordance
with the operating mode selected.
c) The arc ignites when the torch is lifted off and swivelled into its normal position.
3.2.2

Automatic shut-off

If ignition of the arc does not occur after starting or if the arc is interrupted when the torch is
moved away, an automatic cut-out occurs after 3 sec. HF, gas and the open circuit voltage
(power unit) are switched off.
3.2.3

Digital display

On the digital display (D1), the welding parameters
• welding current and
• welding voltage are shown.
Whether the welding current or welding voltage is to be displayed is selected on the changeover
switch (C1).
Fig. 3/3: Liftarc
3/4