Migatronic TIG SCOUT 160 HP Manuel D'instructions page 13

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 elec-
trode 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 I
Pulse current is set by using the key pad
normally used for setting of welding
current I .
2
Pulse time
Time for pulse current is adjusted be-
tween 0.003 and 2 sec. A green LED is
indicating that the pulse current is
present.
Base amp time
Time for base amp is adjusted between
0.003 and 2 sec. A green LED is
indicating that the base current is
present.
Slope-down
When welding is stopped by activation of
the trigger the machine enters into
slope-down.
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.
During this period
Current mode control
Internally:
In internal mode the current is adjusted by
means of the turn button below the display.
Torch control:
Adjustment is made by means of the adjust-
ment knob on the welding torch if such one exists.
The maximum welding current is adjusted on the
knob on the machine control panel. By means of the
torch adjustment it is possible to decrease the
current to the minimum current of the machine, but
not to exceed the maximum setting on the machine
control panel.
Remote control:
Adjustment is made by means of pedal. The
maximum welding current is adjusted on the button
on the control panel. By means of the pedal it is
possible to vary the amount between minimum and
. maximum of the set current on the display.
2
When the feet pedal is connected, the machine will
always be in 2-times trigger mode and selection of
the functions 4-times and slope-down is not possible.
Fixed functions
A number of functions are fixed and cannot be
connected or disconnected from the control panel.
Anti-freeze
The antifreeze function is always active. When
welding MMA or TIG it may occur that the electrode
sticks to the work piece. The machine will register
that the electrode sticks and it will then decrease the
welding current to 10 A which make it easy to break
the electrode off the work piece. Welding can then
be restarted as usual.
Pre-flow
the
Pre-flow is the period of time for which gas flows
after the torch switch is pressed and before the HF
arc is established, or until the torch is lifted away
from the workpiece in the Liftig process. Time is set
to 0.1 sec.
Safety timer
If the welding arc has not been established after 2
sec., using contact-free striking in TIG mode, then
the machine is reset and the high voltage generator
is switched off.
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