Migatronic DELTA 200 DC HP Manuel D'instruction 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
adjusted 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.
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