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CEBORA S.p.A.
2 - SYSTEM DESCRIPTION.
2.1 - Introduction.
The POWER SPOT 5600 is a system for welding ferrous and non-ferrous threaded stud bolts
or rivets, on various types of sheet metal.
It is made up of an electronic power source (art. 2154), and a set of accessories to adapt to
various applications and tasks (see Sales Catalogue).
The power source is controlled by microprocessor-controlled electronic circuits that manages
the operator interface and operation.
2.2 - Technical specifications.
To verify the technical specifications, see the machine plate, Instructions Manual and Sales
Catalogue.
2.3 - Description of power source art. 2154.
Art. 2154 is a capacitor discharge power source made up of a single-phase transformer, a
rectifier bridge, a battery of capacitors and a scr static switch.
It may be powered at either 115 or 230 Vac; the unit adapts automatically based on the
voltage applied to the power source input.
Referring to fig. 3.2.1, the electrical diagram in par. 5.1, drawing 4.1 and table 4.3, you can
identify the main blocks that make up the unit.
The operating principle is based on the effects of the passage of high current, supplied by the
DC-capacitors (24) (capacitor discharge), onto the small contact surface offered by rivets or bolts
with the sheet metal to which they are being welded. The amount of energy needed at the
welding point is adjusted by checking the dc voltage on the DC-capacitors (24). This adjustment
is made by means of a "triac" that partializes the supply voltage provided by the 190 Vac
secondary circuit of the transformer (31).
The DC-capacitors (24) that create the welding point are discharged by means of a "scr" (3)
static switch on the high current circuit, which becomes conductive and directly connects the
DC-capacitors (24) to the output terminals (F) and (G) of the power source.
The main switch (21) powers the power board (12), which contains:
- the filter to reduce conducted interference reflected in the mains;
- the circuits to select the supply voltage via the relay RL1;
- the "triac" to adjust the voltage on the DC-capacitors (24);
- the rectifier bridge that keeps the voltage adjusted by the "triac" continuous.
The power board (12) is connected to the transformer (31) that generates the supply voltages
for the power (190 Vac) and control circuits (18 Vac), and galvanically isolates the output and
control circuits from the input circuits linked to mains potential.
The control board (2), powered by the same service voltages generated on the power board
(12), also acts as a control panel as it contains both the control circuits and the command and
signaling circuits, and is mounted on the front panel of the power source.
Depending on the supply voltage applied to the power source input, the check either does or
does not activate relay RL1 on power board (12), which adapts the power source operation to the
mains voltage by connecting in series (for 230 Vac main) or parallel (for 115 Vac mains) the two
primary windings at 115 Vac of the transformer (31). In this way both the control and power
circuits are always powered by the same secondary voltages.
Once the power source is powered, the control checks the triac on power board (12), which
partializes the voltage supplied by the secondary circuit at 190 Vac of the transformer (31) to
slowly charge the DC-capacitors (24) until the programmed voltage shown on display (E) is
3.302.311
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23/01/2015
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