Migatronic PI Manual De Instrucciones página 12

PI control panels
Electrode welding (MMA)
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Is used for selection of electrode
welding. It is not possible to change
welding process during welding.
Hot start
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Hot start is a function that helps to establish the
arc at the beginning of MMA welding. This can
be achieved by increasing welding current (when the
electrode is applied to the workpiece) in relation to the
set value. This increased start amp is maintained for half
a second, after which it decreases to the set value of
welding current.
Amp
0,5 s
Set welding
current
Welding start
The hot start value reflects the percentage value by which
initial current is increased, and can be set between 0%
and 100%.
Arc power
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The arc power function is used to stabilise the
arc in MMA welding. This can be achieved by
increasing welding current during the short-circuits. The
additional current ceases when the short circuit is no
longer present.
Amp
Set welding
current
short-
circuit
Arc power can be adjusted between 0 and 100% of the
welding current setting.
E.g. If the welding current is set to 40A and arc power to
50% the additional current is 20A equals 60A when
doing arc power. If the arc power is set to 100% the
additional current is 40A equals 80A when doing arc
power.
Torch adjustment/remote control
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– 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.
All manuals and user guides at all-guides.com
Additional
current supply
from hot start-
function
time
Additional current supply
from the arc power-function
time
External adjustment – 8-poled plug (optional)
27
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.
Ignition methods
28
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.
A third option permits the use of a TIG torch without trigger:
LIFTIG without TRIGGER.
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.
LIFTIG-ignition without Torch trigger (TIG)
This operation offers the possibility of using TIG torches
without trigger: turn ON the arc by touching the workpiece
with the electrode and lift the torch to ignite the arc. To
activate the operation keep pressed for 3 seconds the keypad
"trigger mode": the relative led flashes on and off to indicate
the new function. Turn OFF the arc by removing the torch
from the workpiece.
Trigger mode
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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 It is possible to configure
the machine to work in 2 different ways when this mode is
selected. For detailed information read the section "USER
MENU" conc. "2t.o."
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."
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