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Migatronic PI 400 PLASMA - Welding Features and Parameters; Faults and Process Selection; TIG and Plasma Parameter Adjustment

Migatronic PI 400 PLASMA
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21
Cooling fault
Cooling fault is shown in case of connection
of wrong type of torch, or if a torch has not been
connected. If a flow control kit has been selected, the
cooling fault may indicate problems in the cooling unit.
Reset the error message by pressing the keypad
MMA.
Gas fault
Welding stops and the text GAS flashes in
the display due to shield gas fault. The error message
can be removed by pressing the MMA-key pad.
Fault symbols
The indicator next to the icon blinks when
other types of errors occur. At the same time a fault
symbol is shown in the display.
Selected error codes:
(Reset the error messages by pressing the keypad
MMA)
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
Selection of welding proces
Electrode welding (MMA)
Is used for selection of electrode welding. It is
not possible to change welding process during
welding.
TIG welding
Press this knob to activate TIG process
PLASMA welding
Press this knob to activate TIG process
TIG and PLASMA welding
TIG and PLASMA 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 after the arc has been
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. Please note that values higher
than 100% generate a Start Amp bigger than welding
current.
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 (only TIG 4T stroke)
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.

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