Migatronic FOCUS TIG 160 DC HP Manuel D'instruction page 15

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 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.
Current mode control
Internally:
In internal mode the current is adjusted
by means of the turn button next to the display.
Torch control:
Adjustment is made by means of the
adjustment 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.
When the feet pedal is connected, the machine
must always be in 2-times trigger mode and
selection of the functions 4-times and slope-
down is not possible.
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