Cebora TRI STAR MIG 1635/M Service Manual page 5

CEBORA S.p.A.
− two 3-digit displays to show output voltage, welding current, wire speed, values assignable to
the selected parameters, material type, services functions and error codes.
The welding current regulation is performed by the microprocessor on the control board (29),
based on signals received from the power board (32), and parameters set via control panel.
The microprocessor also controls the supply voltage conditions, to activate any safety devices
necessary to protect the power source (see Error codes par. 3.4).
On the front panel are gathered the terminals for the welding torch, which must be connected
according the modalities imposed by the selected welding process (sees Instructions Manual).
In particular, are present two GIFAS (G) and (H) terminals for the welding current, a
centralized socket (E) with pneumatic socket for the gas, and a two poles connector (F) for the
start command from the torch push-button.
The choke (28) and the power board (32) diode group outputs, are connected to the power
source output terminals, from which is picked up the power source output voltage signal. This
signal is used by the control board (29) to detect short-circuits of the wire on the workpiece
during welding, and consequently to adjust the welding current, as well as stop the power source
if the short-circuit lasts too long.
Fans (27), for the power source power elements cooling, are connected to the power board
(32) and powered from the same source (+24 Vdc) that feeds the control board (29).
The signals processed by the electronic boards and present at their connectors are listed in the
table in chapter five of this manual.
3.302.233
5
22/09/2008