CEBORA S.p.A.
5
speed based on the most suitable synergic curve selected from among those saved in the memory
of the board.
Within the speed range associated with the selected synergic curve, it is possible to fine-tune
the wire speed using the potentiometer provided (knob P).
If the manual program is set (P00 on display (H)) the wire speed is adjusted manually, thus
regardless of the position of switches (44) and (45), and may be adjusted from 0 to
approximately 20 m/min. using knob (P).
The motor speed is adjusted by the electronic regulator present on the control board (4),
which is powered with the same supply voltage as the control board (4), supplied by the service
transformer (55).
When the torch button is pressed, the control board (4) sends the closing command to the
contactor (51), which coincides with the start signal for the timing board (62), which controls
operation of the fan (58) and the cooling unit. After welding, thus when the start button on the
torch is released, the contactor (51) is disabled immediately, while the pump and fans on the
cooling unit and fan (58) on the power source remain running for approximately ten minutes
longer, after which time they also stop and await a new start command.
The secondary transformer (5) circuit is connected to the rectifier bridge (56), which keeps the
welding current constant. The choke (53) inserted downstream of the rectifier bridge (56), serves
to level the welding current, and its intermediate sockets allow you to maximize welding quality
as the material to be welded changes.
The shunt (23) inserted between the positive pole of the rectifier bridge (56) and the central
adapter (39) of the torch, provides the control board (4) with the signal to show the welding
current on display (H) during welding.
The power source power outputs are gathered together on the front panel. A central adapter
(G)(39) is set up for the torch with a built-in power socket, two contacts for the start command,
and a pneumatic socket for gas.
The negative output terminal (V) of the power source is located on the front panel, and is
composed by three terminals of the choke (53) to select the choke portion to use.
The following are present on the rear panel of the power source:
−
the socket (15) for the cooling unit power supply;
−
the connector (17) to connect the flow meter on the cooling unit;
The gas solenoid valve (12) is activated by the torch start button, and its opening time also
depends on the post-gas time set.
Similarly the line contactor (51) is activated by the torch start button, and its closing time also
depends on the Burn-Back time set and the status of the safety parts in the power source (safety
switch (46) on the wire feed unit guard, and thermostat located on the windings of the power
transformer (5)).
The signals processed by the electronic boards and present at their connectors are listed in the
table in chapter five of this manual.
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