Spot Welding; Aluminium Welding; Maintenance; Possible Problems And Remedies - CEA MAXI 405 Manuel D'instructions Et Pièces Détachées

SPOT WELDING

This type of welding is recommended for repairs in automo-
bile body shops.
• Replace the gas-guide nozzle with the special type for spot
welding (see Fig. F).
• Set the spot-weld time by the potentiometer located on the
front panel of the wire feeder.
• Select the most suitable tension and speed adjustment, using
the respective controls, in function of the type of work to do.
• Press the gas-guide nozzle perpendicular to the part to be
welded.
• Press the torch button to start the welding current and ad-
vancement of the wire.
• At the end of the set spot welding time, the wire stops ad-
vancing automatically.
• Pressing the torch button again begins a new welding cycle.
• Release the torch button.

Aluminium welding

To weld with aluminum wire proceed as follows:
• Replace the drive rolls with special ones for aluminium wire.
• Use a torch with a 3 m cable and a carbon Teflon sheath.
• Set the pressure between the drive rollers at the minimum,
by turning the screw provided.
• Use argon gas at a pressure of 1-1,5 bar.

Maintenance

IMPORTANT: Any eventual maintenance must be carried out
by expert, qualified personnel. The guarantee is invalidated if
the final user attempts to repair any damage done to the ma-
chine by himself.
ATTENTION: Before carrying out any inspection of the inside
of the generator, disconnect the system from the supply.
GENERATOR
The maintenance of this equipment is limited to the cleaning of
the inside of the frame and periodic inspection of worn cables
or loose connections. At regular intervals disconnect the weld-
er from the mains, take off the cover and use dry compressed
air to remove possible accumulations of dirt and dust. During
this operation do not direct the jet of air onto electronic com-
ponents. Check, that the gas circuit is completely free from im-
purities and that the connections are tight and that there are
no leaks. Carefully check that the electric valve does not leak.
Check the wire feeder rolls periodically and replace them when
wear impairs the regular flow of the wire (slipping etc).
TORCH
The torch is subjected to high temperatures and is also stressed
by traction and torsion. We recommend not to twist the wire and
not to use the torch to pull the welder. As a result of the above
the torch will require frequent maintenance such as:
• Cleaning welding splashes from the gas diffuser so that the
gas flows freely.
• Substitution of the contact point when the hole is deformed.
• Cleaning of the wire guide liner using trichloroethylene or
specific solvents.
• Check of the insulation and connections of the power cable.
the connections must be in good electrical and mechanical
condition.
FIG. F

Possible problems and remedies

The detection of eventual problems and their solution. The pow-
er supply line is the major source of problems. In the event of
a fault proceed as follows:
1) Check the voltage of the supply.
2) Check the state of the line connection at the plug and the
main switch.
3) Check that the main fuses are not burnt out or loose.
4) Check the following for defects:
• The switch and wall outlet that power the machine.
• The plug and mains cable.
• The welder switch.
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