Migatronic PILOT 1500 HP Manuel D'instruction page 13

Four-stroke
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 must be kept pressed down.
3) The arc is established by lifting the torch, and the
torch trigger is deactivated. In order to stop the
welding process, the torch trigger is reactivated.
The arc will extinguish after the period of slope-
down time.
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 respecitive
key pads.
Base amp
Base amp is set in per cent in relation to
adjusted welding current I
using the key pad normally used for setting of welding
current I .
2
Pulse time
Time for pulse current are adjusted between
0.003 and 2 secs.
Base amp time
Time for base amp are adjusted between
0.003 and 2 secs.
Slope-down (in four-stroke only)
When welding is stopped by activation of the
trigger the machine enters into slope-down. During
this period the current is decreased to the final
current. The length of this period is the slopedown
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 3-30
secs. The time is adjusted so the tungsten electrode
and weld are protected against oxidation.
Current control mode
Internally:
In internal mode the current is adjusted by
means of the turn button below the display.
. Pulse current are set by
2
Torch control:
Adjustment is made by means of the adjust-
ment button on the welding torch if such one exists.
The maximum welding current is adjusted on the
button 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 ex-
ceed the max. 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.
Fixed functions
A number of functions are fixed and cannot be
connected or disconnected from the control panel.
Antifreeze
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 8 A which make it easy to break the
electrode off the work piece. Welding can then be
restarted as usual.
Pre-flow
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 fixed at 0.1 sec.
13