Migatronic DELTA 160 DC HP Manuel D'instructions page 17

Four-stroke HF-ignition:
This symbol means
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:
contact-free 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
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
extinguished if the torch trigger is released
before the slope-down period is finished.
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 activation
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.
17
trigger is activated
stopped and the
Pulse welding
This key pad is used for shift
between welding without pulse
and pulse welding. Base amp,
and
arc