Migatronic DELTA 200 DC HP PFC Manuel D'instruction page 17

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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
between 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.
Gas post-flow
The gas post-flow time is the period
from the extinction of the arc to the
interruption of the gas supply. The time is
indicated in seconds from 0 - 30 secs. The time
is adjusted so the tungsten electrode and weld
are protected against oxidation.
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