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Telwin MAGNUM 400 CE Seite 7

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be removed before lifting the engine-driven welding machine. Make
sure the lifting cables, belts or chains do not damage the engine-
driven welding machine accessory parts.
POSITIONINGTHEENGINE-DRIVENWELDINGMACHINE
Make sure the engine-driven welding machine is positioned in a
place where the cooling air inlets and outlets cannot be obstructed;
at the same time make sure that conductive dust, corrosive vapours,
humidity etc. cannot be drawn into the machine.
Leave at least 1 m free space all around the engine-driven welding
machine.
WARNING! Position the engine-driven welding
machineonalevelsurfacewithsufcientload-bearingcapacity,
sothatitcannotbetippedoverorshiftdangerously.
MACHINE EARTHING
To prevent electric shocks caused by faulty user equipment,
the machine must be connected using a xed earthing system and
through the relative terminal.
Fig. E
THE ELECTRIC CONNECTIONS MUST ONLY BE CARRIED OUT
BY EXPERT OR QUALIFIED TECHNICIANS.
INTERNAL COMBUSTION ENGINE
- The engine-driven welding machine is supplied without motor oil:
top-up with the oil types and quantities described in the manual of
the internal combustion engine
- The engine-driven welding machine is supplied without diesel: ll
the motor using the relative lling nozzle (Fig. F).
- The engine-driven welding machine is supplied with cooling liquid
(50% water, 50% antifreeze). Use the relative lling nozzle (Fig. G)
to top-up.
- Insert and turn the battery switch (Fig. H).
- Set the “Idle switch” in “ON” position.
- Start the engine with the ignition key.
- After about 30s place the “Idle Switch” in “OFF” position (“Welding
ON” lamp on).
- It is now possible to start using the engine-driven Welding machine.
- To stop the engine use the ignition key.
- Refer to the internal combustion engine manual for information on
checks to be carried out before use and before running-in.
WELDINGCIRCUITCONNECTIONS
WARNING! MAKE SURE THE ENGINE-DRIVEN
WELDING MACHINE IS SWITCHED OFF BEFORE CARRYING
OUTTHEFOLLOWINGCONNECTIONS.
Table (TAB. 1) shows the recommended sizes of the welding cables
(in mm2), according to the maximum current output from the engine-
driven welding machine.
Electrode holder clamp-welding cable connection
Take a special clamp, which will tighten the uncovered part of the
electrode, to the terminal.
Connect this cable to the clamp with the symbol (+).
Connecting the welding current return cable
Take a clamp, to be connected to the workpiece or to the metal
bench on which is it positioned, to the terminal, keeping it as close as
possible to the joint being worked.
Connect this cable to the clamp with the symbol (-).
Recommendations:
- Screw the welding cable connectors right down into the quick
couplings, so as to ensure perfect electrical contact; otherwise, the
connectors will overheat, wear rapidly and become inefcient.
- Use welding cables that are as short as possible.
- Do not use metal structures that are not part of the workpiece to
substitute the welding current return cable; this could endanger
safety and produce an unsatisfactory weld.
6.WELDING:DESCRIPTIONOFPROCEDURE
- It is essential to refer to the indications of the electrode producer
regarding correct polarity and optimum welding currents (these
indications are generally given on the electrode packaging).
- The welding current should be adjusted according to the diameter
of the electrode used and the type of joint that is to be carried out;
as an indication the following currents can be used for the different
electrode diameters:
Electrode Ø
(mm)
Weldingcurrent(A)
min. max.
1.6 25 50
2 40 80
2.5 60 110
3.2 80 160
4.0 120 200
5.0 160 230
6.0 200 400
- Keep in mind that high current levels are used when at welding,
while lower currents should be used with vertical or overhead
welding.
- The mechanical characteristics of the welded joint are determined
by the intensity of the selected current, and also by the other
welding parameters such as arc length, execution speed and
position, electrode diameter and quality (for correct conservation
protect the electrodes from humidity using suitable packages or
containers).
Procedure:
- Keeping the mask IN FRONT OF YOUR FACE, rub the electrode
tip on the workpiece as if lighting a match; this is the most correct
method for striking the arc.
WARNING: DO NOT continually tap the electrode against the
workpiece as this could damage the covering, which would make it
difcult to strike the arc.
- As soon as the arc has been struck, try to keep at a certain distance
from the workpiece, equivalent to the diameter of the electrode
being used. Keep this distance as constant as possible while
welding, and remember that the electrode angle when moving
forward must be approx. 20-30 degrees (Fig. I).
- At the end of the weld seam, move the electrode extremity
backwards and position it above the crater to ll; then quickly lift
the electrode from the weld pool to switch off the arc.
ASPECTSOFTHEWELDSEAM
Fig. L
7. USING THE ENGINE-DRIVEN WELDING MACHINE AS A
GENERATOR IN ALTERNATE CURRENT
- Make sure the machine is connected to an earth peg as described
in chapter 5. INSTALLATION.
- Make sure the equipment voltage is the same as the auxiliary outlet
output.
- Connect the tool outlet to the input on the machine.
WARNING!
- The load must be applied when the motor has been started.
- Disconnect the load before switching off the motor.
- If the AC outlets are overloaded or if the connected equipment
malfunctions, the thermostatic safeguards cut in.
- Reset is not automatic. To reset the system (RESET) the
thermostatic safeguard MUST be re-activated.
It is forbidden and dangerous to connect the machine
and power the electric network of a building.
8. MAINTENANCE
WARNING! BEFORE CARRYING OUT MAINTENANCE
WORK,MAKESURETHEENGINE-DRIVENWELDINGMACHINE
ISSWITCHEDOFF.
ROUTINE MAINTENANCE
ROUTINE MAINTENANCE WORK CAN BE DONE BY THE
OPERATOR.
… 7 …

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