Migatronic PI 200 AC/DC HP Manuel D'instruction page 17

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).
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17
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.