When The Start Button Is Released, The Wire Attaches To The Workpiece To Be Welded; Tig Unstable Arc, Irregular Welding - Cebora KINGSTAR 400TS Manual De Servicio

CEBORA S.p.A.
3.5.12 When the start button is released, the wire attaches to the workpiece to
be welded.
□ 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 (208), if necessary, as
described below;
- Check operation of burn-back function regulation, carrying out welding tests with
different set-ups of this parameter or swapping the working program for a similar
program, if available. If problems are encountered, check compatibility of the
software program version in the welding system and if necessary update by running
the "Firmware update" procedure (see section 2.6);
- 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 control board (37) and/or master control board (70) and/or motor control
board (222).
TESTING WIRE FEED MOTOR BRAKING (208)
□ Motor control board (222), connector J14, terminals 1(+) and 2(-) , when the start
button is released and with the power source running and no load (voltage at wire feed
motor (208) during correct braking, from a speed of 25 m/min.). The wire feed motor
stops immediately.
Check for any mechanical problems
that could prevent the wire stopping
immediately (e.g. slippage of wire feed
rollers, incorrectly adjusted roller
press, etc.)
Replace wire feed assembly (208)

3.5.13 TIG unstable arc, irregular welding

In TIG mode, welding quality may not be acceptable due to current instability. In this
case we recommend performing MMA welding tests.
3301045
YE
Correct?
NO
♦ If the motor slows down under its own
inertia, assume that the braking circuit
on motor control board (222) is not
operating and replace motor control
board (222)
NOTE
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17/09/2019