Cebora SYNSTAR 200 M Manual De Servicio página 19

the power source output voltage signal, used by the INV
board in order to adapt the power source behaviour to the
arc welding conditions.
An other secondary winding of the TF5 power transformer,
during inverter operation, generates the supply voltage for
the wire feeder motor control circuits, present on the panel
board (48).
In some particularly critical situations, such as welds with
very low currents, this voltage may be not sufficient to
ensure the proper operation of the wire feeder motor.
To overcome this lack of energy, has been inserted in
the circuit the supply board (53), the output of which is
connected in parallel to the source coming from the
power board (45) and contributes to the panel board (48)
powering.
In the power source art. 322 the wire feeder unit is inte-
grated and is composed by the gearmotor and the holder
coil support, enclosed by a protection carter.
The panel board (48) contains the main power source
microprocessor and supervises management of the
complete power source functions.
On panel board (48) are generated the reference signal
to be sent to the INV board, for the inverter control and
the power supply voltage for the wire feeder motor (25),
adjusted according to the requirements of the welding
program selected.
The welding programs predefined by Cebora (synergic
curves) are stored in the panel board (48).
For their update and for the power source firmware update,
on panel board (48) the programming connector BD1 is
present (see par. 2.4).
The panel board (48) also acts as power source control
3302316/A
Fig. 2.3.2
panel and contains the display A and multifunction knob
B to perform the supervision and management of the com-
plete power source (see Instructions Manual).
The power board (45) receives the temperature signals from
the thermoswitches located on boost converter igbt dissipater
(connected to TP22 and TP23) and on the secondary diodes
group dissipater (connected to TP14 and TP21).
The fan (44) operation is subject only to the flyback
operation and is independent of the power source working
conditions.
In case of flyback circuit or fan (44) failure, for example
due to a fault, the DC-capacitors discharge time can
become much longer (several minutes).
In this case, before working on the power board (45)
wait until the DC-capacitors voltage, measured between
R32 SHUNT(-) terminal, in proximity of inductor L3
and the DISS2(+) dissipater on power board (45), falls
to a safe level (<40 Vdc).
The power source output terminals are located on the front
panel.
For MIG torch it is predisposed a central adapter C that in-
cludes a power socket, two contacts for the start command
and a pneumatic fitting for the gas.
The ground cable comes out directly from the cable gland
D and ends with the clamp for welding bench connection.
In the wire feeder compartment is present the power
source output terminals polarity reverser to be used in ap-
plications requiring the reversed polarity (see Instructions
Manual).
WARNING
EN
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