Migatronic PI 350 DC Manual De Instrucciones página 21

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).
Connection of a separated water cooling unit
(PI 350)
Fasten the module under the machine with the fitting (13).
Mount the 4-poled plug (15) in the corresponding socket in
the machine (14). 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
If the machine is delivered with water cooling, 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 (16)
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 (17) to turn on the
autotransformer (green indicator light). The built-in
energy saver function will automatically turn off the
welding machine after 40 minutes of inactivity.
Press the button (18) 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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