Migatronic DELTA 160 DC HP Manuel D'instructions page 18

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 ad-
justed on the knob on the machine control
panel. By means of the torch adjustment it is
possible to decrease the current to the mini-
mum 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.
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
Pre-flow is the period of time for which gas flows
after the torch switch is pressed and before the
HF arc is established. In the LIFTIG process the
period is the time until the torch is lifted away
from the work piece. Time is set to 0.1 sec.
Safety timer
If the welding arc hasn't 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.
18