Migatronic PI 320 DC Manuel D'instruction page 23

Selected error codes:
(The error code can be reset by pressing the MMA-
key pad.)
Torch cooling fault
Cooling fault is shown in case of no
circulation of the cooling liquid due to faulty
connection or choking.
Check that the cooling hoses are correctly connected,
top up the water tank and check welding hose and
branches.
Mains supply fault
The icon will be shown, when the
mains voltage is too high.
Connect the welding machine to 400V AC, +/-15%
50-60Hz.
OTHER TYPES OF FAULTS
If other fault symbols are shown in the display, the
machine shall be switched off and then on to dispose
of the symbol.
If the fault symbol is shown repeatedly, repair of the
power source is required. Contact your distributor with
information of the fault
TIG welding
TIG welding
The parameters can be adjusted with the
control knob after they are shown on the
display. Press the relative key to select the parameter.
The relevant LED will illuminate.
Pre-flow [s]
Pre-flow is the period of time for which gas
flows after the torch switch is pressed and
before the HF arc is established. Variable 0-10 sec. In
the LIFTIG process the period is the time until the
torch is lifted away from the workpiece.
Start Amp [A%]
Immediately
established, the machine regulates the
welding current to the value stated in the Start Amp
parameter. Start Amp is set as a percentage of the
required welding current and is variable between 1-
200% of the welding current. Please note that values
higher than 100% generate a Start Amp bigger than
welding current.
after the arc has
Slope-up [s]
Once the arc has been established, the
welding process enters a slope-up stage
during which the welding current is increased in linear
fashion from the value stated in the Start Amp para-
meter to the required welding current. The duration of
this slope-up time is variable 0-20 sec in steps of 0.1
sec.
Second current level
Adjustable from 10 to 200% of welding
current. It is activated in four-times only by
pressing and releasing quickly the torch trigger.
Please note that values bigger than 100% generate a
secondary current bigger than welding current.
Slope-down [s]
When welding has stopped by activating the
trigger, the machine enters a slope-down
stage. During this stage current is reduced from
welding current to Final Amp over a period of time
called the slope-down time and variable 0-20 sec in
steps of 0.1 sec.
Final Amp [A%]
The slope-down stage is completed when
the current level has fallen to the value
stated in the Final Amp parameter. In 4-times it is
possible to continue in Final Amp mode until the
trigger is released. Final Amp is stated as a per-
centage of the required welding current and is variable
between 1-90% of the welding current.
Spot time
The spot time in TIG is the time from the end
of slope up to beginning of slope down.
Therefore, during spot time the machine is welding
with the adjusted current. The LED flashes on and off
when the function is active.
Amp
Set welding
current
Set the timer before igniting the arc. The torch trigger,
depending from the selected torch mode can interrupt
the spot welding time. Variable 0.01-600 sec. The
been
function is disconnected when the time is set to 0 sec.
When used during tack welding, the timer can be set
from 0.01 sec to 2.5 secs (See TIG-A-TACK).
23
spot
welding time
slope-up slope-down
trig down ( ) / up ( )
time