System Description; Introduction; Technical Specifications; Description Of Power Source Art. 255 - Cebora POWER ROD 1565 Cell Service Manual

CEBORA S.p.A.

2 - SYSTEM DESCRIPTION

2.1 - Introduction.

The POWER ROD 1565 Cell is a system for MMA, MMA Cellulosic and TIG welding with
strike starting of the arc.
It is made up of an electronic power source (art. 255), and a set of accessories to adapt to
various types of applications (see list in Sales Catalogue).
The power source is controlled by a microprocessor circuit, which manages the operative
functions of the welding system and the operator interface.

2.2 - Technical specifications.

To verify the technical specifications, see the machine plate, Instruction Manual, and Sales
Catalogue.

2.3 - Description of power source art. 255.

Art. 255 is a direct current power source with controlled current, consisting of a single-phase
rectifier bridge, a DC/AC mosfet converter (inverter), and an additional single-phase rectifier
bridge.
Referring to the electrical diagram in par. 5.1, drawing 4.1 and table 4.2, we can identify the
main blocks that make up the power source.
The main switch (5) powers the power board (11), which contains the power circuits and
control circuits to manage the functions of the power source art. 255. It converts the alternating
voltage of the network into direct current, adjusted according to welding needs. The welding
current is adjusted by the microprocessor based on the signals received from the panel board
(16).
The microprocessor also checks the condition of the supply voltage, to implement the
protections needed to protect the power source (see Error codes, par. 3.4).
The panel board (16) represents the power source control panel and depends entirely on the
power board (11), from which it receives supply voltages.
The panel board (16) contains the signaling leds (see Error codes, par. 3.4), the potentiometers
for setting the operating parameters, and the connector to connect external control devices to the
power source.
The fan (9), connected to the power board (11), is actually connected directly in parallel to the
board mains input terminals, for which it is subjected to all variations in the mains voltage,
without any control by the power board (11).
The power source requires only the mains voltage supply in order to operate. Once powered,
the power source performs the "lamp-test", during which the microprocessor analyzes the mains
voltage. If the voltage is found suitable, the microprocessor then prepares the power source for
the type of operation, based on the level of the START Signal (terminal 7 of CN1 on power
board (11)), which in turn is determined by the jumper on terminals 8 and 3 of the connector (H),
as illustrated in table 2.3.1.

2.3.1 - Operating mode setting.

Accessories
connected
to the connector H
None / art. 187
TIG torches / art.
181
3.302.113
Jumper 8-3 Operating mode
connector H
Open MMA/MMA cell
Closed
Start
button
Absent
Released
TIG
Pressed
Signal Output
START voltage
1.5 – 4 Vdc YES
>4 Vdc NO
<1.5 Vdc YES
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