Arc Difficult To Strike, The Arc Goes Out Immediately After Lighting; When Start Button Is Released, The Wire Sticks To The Workpiece (Ineffective Motor Braking) - Cebora SOUND MIG 2035/M Pulse Service Manual

CEBORA S.p.A.

3.3.9 - Arc difficult to strike, the arc goes out immediately after lighting.

"Hot-Start" and "Soft Start" functions are adjustable by set-up menu (see diagram 2.9 and
Instruction Manual). Also "Impedance" function, adjustable using knob (P), can assist welding
start. Therefore, when dealing with start-up problems and difficulty in maintaining the arc, we
recommend:
− Checking the "Impedance" function setting by performing the following test.
− Carrying out welding tests, changing "Hot-Start" and "Soft Start" functions values and if
necessary the working program with one similar to the one being used, if available, and
adjusting the knob (P) to improve the welding conditions.
− 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 (27).
IMPEDANCE ADJUSTMENT TEST.
Control board (27), connector J12 terminal 20 (+) (or R79 right side) and connector J14 (-) =
0 / +5 Vdc adjustable with knob (P).
♦ Check the wiring between connectors J12 on control board (27) and J1 on panel
board (41), and make sure the push-pull board (43) is properly mounted on panel
board (41).
♦ Replace the control (27) and/or panel (41) and/or push-pull (43) boards.
♦ Correct operation.
3.3.10 - When start button is released, the wire sticks to the workpiece (ineffective motor
braking).
The torch motor does not have electric braking, but brakes through simple release (thus not
powered), and the wire is automatically stopped by the motor (401) on the power source.
WIRE FEEDER MOTOR (401) BRAKING TEST.
Control board (27), connector J13 terminals 2 and 1 (gnd) = fig. 5.2.3, upon releasing the start
button and with open-circuit power source. The wire feeder motor stops immediately.
♦ If fig. 5.2.4 is found (the motor slows from its own inertia), the braking circuit on
the control board (27) does not work, replace control board (27).
♦ 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 (27) and/or motor (401).
3.302.161
Correct?
YES
NOTE
Correct?
YES
NO
NO
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24/03/2004