When The Start Button Is Released, The Wire Sticks To The Workpiece To Be Welded (Inefficient Motor Braking) - Cebora SYNSTAR 270 T Manual De Reparaciones

3�3�12 When the start button is released, the wire sticks to the workpiece to be welded (inefficient
motor braking)�
To optimise the end of MIG welding, the working programs include a burn-back function that can be regulated from
the control panel (see Instruction Manual).
In the event of difficulties at the end of MIG welding:
− check the wire feed motor brake function is working correctly by following instructions for TESTING WIRE FEED
MOTOR BRAKING (11), if necessary, as described below;
− check operation of burn-back function regulation, carrying out welding tests with different set-ups of this parame-
ter or swapping the working program for a similar program, if available. If problems arise, update the power source
firmware to the latest version available on the Cebora website (see section 2.4);
− check the compatibility of the elements being used (torch, type of nozzle, wire type and diameter, gas type, etc.)
with the type of welding being done;
− check for wear on the torch and its components, and replace if necessary;
− replace panel board (47).
WIRE FEED MOTOR (11) BRAKING TEST
□ Panel board (47), connector J16, terminals 1 - 2 (earth), on releasing start pushbutton, with power source running
on no-load, voltage at wire feed motor (11). The wire feed motor stops immediately.
EN
Correct?
■ Normal operation.
42
NO
YES
♦
Check the wiring between J16 and J8 of panel board (47)
and motor (11).
♦
If the motor slows down under its own inertia, assume that
the braking circuit on panel board (47) is not operating and
replace panel board (47).
♦
Check for any mechanical problems that could prevent
the wire spool stopping despite the motor's braking action
(e.g. slippage of wire feed rollers, incorrectly adjusted
roller spring, etc.).
♦
Replace panel board (47) and/or motor (11).
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