Migatronic PI 200 DC HP Betriebsanleitung Seite 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).
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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