CEBORA S.p.A.
15
♦
Replace power (32) and/or control (29) boards.
♦
Check connection between diode group heat sink on power board (32), inductor (28) and
power (H) output terminal, and between TP9 on power board (32) and power source
–(G) output terminal. If you find loose connections, tighten and replace any damaged
components.
♦
Check wiring between J7 and J3 of control board (29) and J4 of power board (32), between J1
of control board (29) and J1 power board (32), power (H) output terminal and J7 of
power board (32). If you find loose connections, tighten and replace any damaged
components.
♦
Make sure control board (29) power supply performing, if necessary, the CONTROL
BOARD (29) POWER SUPPLY TEST, of par. 3.3.1.
♦
Replace power (32) and/or control (29) boards.
3.3.9
- In MIG, arc difficult to strike, the arc goes out immediately after lighting.
“Hot-Start”, “Soft Start” and “Impedance” functions, available in the “Service Functions”
menu (see Instruction Manual), can assist welding start.
Therefore, when dealing with start-up problems and difficulty in maintaining the arc, we
recommend:
−
Carrying out welding tests, changing “Hot-Start”, “Soft Start” and “Impedance” functions
values and, if necessary, the working program with one similar to the one being used, if
available.
−
Checking the compatibility of the torch with the type of welding being carried out, and
especially matching the torch nozzle with the wire being used.
−
Checking the wear status of the torch and its components, replacing them if necessary.
−
Replace the control board (29).
3.3.10
- When start button is released, the wire sticks to the workpiece (ineffective motor
braking).
WIRE FEEDER MOTOR (31) BRAKING TEST.
Correct?
Control board (29), connector J8, terminals 2 and 1 (gnd) = fig. 5.2.1, upon releasing the start
button and with open-circuit power source. The wire feeder motor stops immediately.
YES
NO
♦
If fig. 5.2.2 is found (the motor slows from its own inertia), the braking circuit on
the control board (29) does not work, replace control board (29).
♦
Carry out the WIRE FEEDER MOTOR (31) TEST, par. 3.3.6.
♦
Make sure that there are no mechanical impediments preventing the wire coil from stopping
despite the braking action of the motor (ex.: sliding by wire feeder rollers, improperly
adjusted roller spring).
♦
Replace the control board (29) and/or motor (31).
3.302.233
22/09/2008
