Migatronic PI 350/500 AC/DC Manual De Instrucciones página 19

The control signals from the TIG torch are transmitted to
the machine through the circular 7-pin plug (7). When the
plug has been assembled please secure it by turning the
"circulator" clockwise. Connect the gas hose to the quick
connection.
COATED ELECTRODES: Electrodes are marked with a
polarity on the packing. Connect the electrode holder in
accordance with this marking to the plus or minus sockets
of the machine.
Connection of TIG torch
Mount the flow hose on the water cooled torch in the quick
connection marked with blue (8) and the return hose in
the quick connection marked with red (9).
Control of cooling liquid
The machine is delivered with integrated water cooling
and the cooling liquid level should be checked regularly by
means of the level control (10). The refilling of cooling
liquid takes place through the filler neck (11).
Connection of electrode holder for MMA
The electrode holder and return current cable are
connected to plus tap (6) and minus tap (5). Observe the
instructions from the electrode supplier when selecting
polarity.
Connection of foot control
Foot control is connected to the 7-poled plug (7) or
through the 8-poled plug (12) (depending on the foot
control type).
Connection of remote control
PI machines equipped with 8-pole control interface (12)
can be controlled via a remote control or a welding robot.
The remote control socket has terminals for the following
functions:
A: Input signal for welding current, 0 –
+10V input impedance: 1Mohm
B: Signal ground
C: Arc detect – contact of relay (max.
1Amp), fully insulated
D: N.C.
E: Arc detect – contact of relay (max. 1Amp), fully
insulated
F: N.C.
G: Supply +24VDC. Short circuit protected with PTC
resistor (max. 50mA).
H: Supply ground
CWF Multi (option)
It is possible to connect to the PI with up to 8 CWF Multi
units via dedicated CAN BUS connector (13) placed on
the rear side of machine (option). In order to permit this
control capability, enter the USER Menu and select "Fdr"
(feeder), then access "Act" (Active devices) and set the
parameter to 1 (see USER MENU).
Now the PI is ready to control the CWF directly from the
box: for each TIG welding program it is possible to select
what CWF unit must be activated and the relative CWF
program in the range 1 to 20.
Depending from the settings on the CWF, if the unit is in
OFF mode the error message "Fdr" can be displayed on
PI and the welding procediment stopped. This is to inform
the user the CWF is not responding to start signal from PI.
Trolley with automatic mains voltage transition
(Special equipment)
Machines
supplied with
autotransformer
can be
connected to the
following mains supplies:
3*230V, 3*400V, 3*440V og 3*500V.
Press the power switch (14) to turn on the auto-
transformer (green indicator light). The built-in energy
saver function will automatically turn off the welding
machine after 40 minutes of inactivity. Press the button
(15) to turn on the machine again (red indicator light).
The energy saver function can be permanently
disconnected by a Migatronic technician.
Usage of the machine
When welding, a heating of various components of the
machine takes place and during breaks these
components will cool down again. It must be ensured that
the flow is not reduced or stopped.
When the machine is set for higher welding currents,
there will be a need for periods during which the machine
can cool down.
The length of these periods depends on the current
setting, and the machine should not be switched off in the
meantime. If the periods for cooling down during use of
the machine are not sufficiently long, the overheating
protection will automatically stop the welding process and
the yellow LED in the front panel will come on. The yellow
LED switches off when the machine has cooled down
sufficiently and is ready for welding.
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