Migatronic PI 320 AC/DC Manuel D'instruction page 24

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 eletrode should not touch the
workpiece. 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 ignition 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. There-
after the post-flow starts.
It is possible to configure the machine to work in 3
different ways when this mode is selected.
For detailed information read the section "USER
MENU" of this manual about "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 to factory settings of all programs
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
•
MMA hotstart 50%
•
MMA arc power 50%
•
TIG Current 80A
•
TIG Spot Current 80A
•
Pre-flow 0.0 sec
•
Post-flow 3.0 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) 50Hz
•
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.
Reset to factory settings
of a single program
Select the program in question, then press and
keep pressed the
turning the encoder. The display will show the current
program number by flashing the segments to confirm
the reset. Then you can release the key pad and the
current program will be reset to factory settings (see
values above).
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. Exit from menu by pressing "- - -" with the "A"
knob.
24
-key pad for 5 secs without
for 3