Maintenance; Maintenance Of The Cutting Inverter; Troubleshooting & Service; Helpful Hints - WELDKAR WK PLASMA 4060 PFC Mode D'emploi

4. MAINTENANCE

ANY MAINTENANCE OPERATION MUST BE
CARRIED OUT BY QUALIFIED PERSONNEL.
4.1 MAINTENANCE OF THE
CUTTING INVERTER
In the case of maintenance inside the machine, make
sure that the switch (11) is in position "0" and that
the power cord is disconnected from the mains. It is
also necessary to periodically clean the interior of
the machine from the accumulated metal dust, using
compressed air.
4.3 TROUBLESHOOTING & SERVICE
Fault
Insufficient penetration
The cutting arc goes off
Shorter life of consumer
parts

Helpful hints

Cause
This error may be caused by the following:
• High speed. Always make sure that the arc fully penetrates the workpiece and
is never held at a forward angle of more than 10 -15°. This will avoid incorrect
consumption of the nozzle and burns to the nozzle holder;
• Excessively thick workpiece;
• Grounding clamp not in good electrical contact with the
• workpiece;
• Worn nozzle and electrode;
• Cutting current too low;
NOTE: When the arc does not penetrate, the molten metal scraps obstruct the nozzle.
This error may be caused by:
• Worn nozzle, electrode or swirl ring;
• Air pressure too high;
• Supply voltage too low.
This error may be caused by:
• Oil or dirt in the arc intake;
• Low arc pressure.
• If the system air contains considerable amounts of moisture and oil, it is best
to use a drying filter to avoid excessive oxidation and wear on consumer parts,
damage to the torch and a reduction in the speed and quality of the cutting;
• Make sure that the new electrode and nozzle to be mounted are thoroughly clean
and degreased;
• Always use original spare parts to avoid damaging the torch.

4.2 PRECAUTIONS AFTER REPAIRS.

After making repairs, take care to organize the wiring
so that there is secure insulation between the primary
and secondary sides of the machine. Do not allow the
wires to come into contact with moving parts or those
that heat up during operation. Reassemble all clamps
as they were on the original machine, to prevent a
connection from occurring between the primary and
secondary circuits should a wire accidentally break or
be disconnected. Also mount the screws with geared
washers as on the original machine.
19