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3.3.10
Arc is difficult to strike, the arc shuts off im-
mediately after striking.
"Soft Start" and "Inductance" functions, available in the
Service Functions menu (see Instructions Manual), can
assist welding start.
The parameters entered in the programs (synergic curves)
are determined based on experience, thus some operators
may find conditions to be optimal while others may need
to make slight changes.
For this reason the operators have the option of changing
the ratio between wire speed and welding current (see In-
structions Manual).
In the situation where there are problems striking the arc
or welding difficulties despite careful management of the
available parameters on the control panel, we recommend:
− make sure the parameters selected reflect the actual
current welding conditions;
− make sure the adjustments are working properly, by car-
rying out welding tests with different parameter settings
or switching the working program with a similar one, if
available, to determine the practical welding differences
with the different settings. If changes of the parameters
do not correspond to welding differences or if you en-
counter problems in selecting the parameters, upgrade
the power source firmware to the last version, available
on the Cebora Web site (see par. 2.4);
− make sure the power source is working properly, per-
forming if necessary the "open circuit operation" tests
in par. 3.3.8 and "operation on resistive load" tests in
par. 3.3.9;
− check the compatibility of the components being used
(torch, type of contact tip, wire type and diameter, type
of gas, etc.) with the type of welding being carried out;
− check the wear status of the torch and its components,
replacing them if necessary.
3.3.11
When the start button is released, the wire
sticks to the workpiece (ineffective motor
braking. Welding quality is not satisfactory,
the wire the wire speed is not suited to the
output current.
To maximize the MIG end welding, the work programs
include the "Burn-Back" function, adjustable from the
control panel (see Instructions Manual).
In case of difficulty at the end of welding:
− make sure that the wire feeder motor brakes properly,
performing, if necessary, the WIRE FEEDER MO-
TOR (11) BRAKING TEST, described below;
− make sure that the "Burn-Back" function adjustment is
working, by carrying out welding tests with different
parameter settings or switching the working program
with a similar one, if available. If you encounter
problems, upgrade the power source firmware to the
3302339/A
last version available on the Cebora Web site (see par.
2.4);
− check the compatibility of the components being used
(torch, type of contact tip, wire type and diameter, type
of gas, etc.) with the type of welding being carried out;
− check the wear status of the torch and its components,
replacing them if necessary;
− replace the panel board (47).
WIRE FEEDER MOTOR (11) BRAKING TEST.
□ Panel board (47), connector J16, terminals 1 and 2(gnd) ,
when the start button is released and with open-circuit
power source (voltage on the wire feeder motor (11)
during correct braking). The wire feeder motor stops
immediately.
YES
Correct?
♦ Check the wiring between J16 and J8 of panel
board (47) and motor (11).
♦ If the motor slows down with its own inertia,
the braking circuit on panel board (47) may
be not working, in which case replace the
panel board (47).
■ Regular operation.
3.3.12
Cooling unit doesn't work correctly.
NOTE
Upon power source start-up, the panel board (47) checks
whether the cooling unit is connected, by means of the
signal provided by the jumper on terminals 1 - 2 of the
connector (9) on cooling unit (Fig. 3.3.13).
With the connector (9) disconnected, or with the jumper
interrupted, the cooling unit is disabled and the operating
mode selection from control panel is not possible;.if the
cooling unit is already enabled, you will have the power
source block with indication of the relative error code.
NO
29
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