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Four-stroke HF-ignition:
This symbol means contact-free
striking. The arc is established in the following
way:
1) The torch is placed so that the Tungsten
electrode is quite close to the welding
spot (1 or 2 mm).
2) The torch trigger is activated and de-
activated, and the high voltage generator
of the machine will produce a voltage
impulse that ignites the arc.
In order to stop the welding process the
trigger must be activated again after
which the slope-down period begins. The
arc will extinguish after the period of
slope-down time, and the trigger is
deactivated. The welding current is
immediately stopped and the arc
extinguished if the torch trigger is released
before the slope-down period is finished.
Two-stroke LIFTIG:
This symbol means LIFTIG ignition.
The arc is established in the following way:
1) The torch is placed so that the Tungsten
electrode has contact with the welding
spot.
2) The torch trigger is activated and must be
kept pressed down.
3) The arc is established by lifting the torch,
and the welding process has started. In
order to stop the welding process, the
torch trigger is deactivated. The arc will
extinguish after the period of slope-down
time.
Four-stroke LIFTIG:
This symbol means LIFTIG ignition.
The arc is established in the following way:
1) The torch is placed so that the Tungsten
electrode has contact with the welding
spot.
2) The torch trigger is activated and
deactivated.
3) The arc is established by lifting the torch.
In order to stop the welding process, the
torch trigger is activated and the slope-
down period begins. The arc will
extinguish after the period of slope-down
time, and the trigger is deactivated. The
welding current is immediately stopped
and the arc extinguished if the torch
trigger is released before the slope-down
period is finished.
Pulse welding
This key pad is used for shift
between welding without pulse
and pulse welding. Base amp,
pulse time and base amp time are adjusted to
the requested values during pulse welding by
using the respective key pads.
Base amp
Base amp is set in per cent (0-100%)
in relation to adjusted welding
current. Pulse current is set by using the key
pad normally used for setting of welding
current.
Pulse time
Time for pulse current is adjusted be-
tween 0.003 and 2 sec.
Base amp time
Time for base amp is adjusted
between 0.003 and 2 sec.
Slope-down
When welding is stopped by ac-
tivation of the trigger the machine
enters into slope-down. During this period the
current is decreased linearly to the minimum
current. The length of this period is the slope-
down period, which is indicated in seconds
from 0 to 10 secs.
