Migatronic PI 200 AC/DC Manual De Instrucciones página 14

Gas connection
Connect the gas hose, which branches off from the back
panel of the welding machine (2), to a gas supply with
pressure regulator (2-6 bar). (Note: Some types of pressure
regulators require an output pressure of more than 2 bar to
function optimally). Fit and secure the gas hose to the gas
connection (6) on the front of the machine.
Connection of welding cables
Connect the welding cables and the return current cable to
the front of the machine.
Please note that the plug must be turned 45 degrees after
insertion into the socket - otherwise the plug can be
damaged due to excessive contact resistance.
Always connect the TIG connection in the minus (-) socket
(4) and the return current cable in the plus (+) socket (5).
The control signals from the TIG torch are transformed 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 a water cooling unit
Fasten the module under the machine with the fitting (10).
Mount the 4-poled plug (11) in the corresponding socket in
the machine (12). Mount the flow hose on the water cooled
torch in the quick connection marked with blue (13) and the
return hose in the quick connection marked with red (14).
If the machine is delivered with a separate water cooling
unit, it will be necessary to inspect the cooling liquid level by
means of the level control (8). The refilling of cooling liquid
takes place through the filler neck (9).
Connection of electrode holder for MMA
The electrode holder and return current cable are connected
to plus tap (5) and minus tap (4). 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 (15) (depending on the foot control type).
Connection of remote control
PI machines equipped with 8-pole control interface (15) 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
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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