Migatronic PI 200 AC/DC HP Manuel D'instruction page 18

Torch adjustment /
remote control – 7-poled plug
The regulation of welding current is made by means
of the torch potentiometer (optional). The maximum current
reachable is the level previously adjusted on the front panel.
The minimum current is 5A.
External adjustment –
8-poled plug (optional)
Can be used for foot pedal (optional) and remote
control units (optional) that use a 8-poled plug. The function
is used for arc ignition and adjustment of the current. The
maximum current reachable is the level previously adjusted
on the front panel. The actual current is shown on the
display.
Start amp can be used as a setting of minimum current as a
percentage of maximum current.
Please note: The machine will automatically start in two-times in
this function when the machine uses a software version before
1.12
Ignition methods
It is possible to choose between 2 different methods
of ignition for TIG welding: High-Frequency (HF) and
LIFTIG ignition. The ignition method cannot be changed
during welding. The LIFTIG ignition is active when the
indicator is illuminated. The HF is automatically active when
the LED is switched off.
HF-ignition
In HF-TIG ignition the TIG arc is ignited without contact. A
high-frequency (HF) impulse initiates the arc when the torch
trigger is activated.
The HF will not arise and the machine will stop if the
electrode is in contact with the workpiece. Detach the
electrode and start again.
LIFTIG-ignition
In LIFTIG ignition the TIG arc is ignited after making contact
between the workpiece and the tungsten electrode, after
which the trigger is activated and the arc is established by
lifting the electrode from the workpiece.
Trigger mode
Selection of trigger mode. Four-times trigger mode is
active when the LED is illuminated, and two-times
trigger mode is active when the LED is turned off. It is not
possible to change trigger method during the welding
process.
Two-times
The welding process begins by pressing the torch trigger.
Welding continues until the trigger is released again which
effects the slope-down period.
Four-times
The welding process begins by pressing the torch trigger. If
the torch trigger is released during the slope-up period
welding continues with the adjusted welding current. In order
to stop the welding process the trigger must be pressed
again for more than 0.5s after which the slope-down period
begins. The slope-down period can be stopped by releasing
the trigger. Thereafter the post-flow starts.
It is possible to configure the machine to work in 4 different
ways when this mode is selected.
For detailed information read the section "USER MENU"
conc. "4t.o."
Anti-freeze
This machine is provided with an anti-freeze control. The
anti-freeze-control reduces the current when the electrodes
stick to the weld piece. This makes it easier to break off the
electrode and welding can continue.
Reset
It is possible to recall all factory standard
parameters. In this case all programs in the
machine will be reset to the following value:

MMA current 80A

TIG Current 80A

TIG Spot Current 80A

Pre-flow 0.2 sec

Post-flow 6.0 sec

No slope-up/slope-down

Start amp 40%

Stop amp 20%

Second Current level 50%

Base amp 40%

Fast pulse frequency 49Hz

Pause time = Pulse time = 0.1 sec

AC-T-Balance (AC) 65%

Electrode Pre-heating (AC) 5

Frequency (AC) 50%

AC-I-Balance (AC) 100%
The Reset procedure is as follows:
Switch off the machine and wait until display is extinguished.
Press the following key pads simultaneously:
Switch on the machine and keep the above keys pressed
until the display shows "X.XX". Then release the keys.
X.XX is the software version of program.
USER MENU
This menu is intended to permit advanced settings
and controls of machine.
To access the user menu, press the knob
seconds when the machine is not welding, MMA or TIG
mode. Rotate the encoder to point the desired option and
activate the selection by pressing "A".
To change the values of parameters press the knob MMA
and rotate the encoder. Press "A" to save the data.
The following diagram display all parameters and options
of menu.
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