Telwin Force 168 MPGE Инструкция по эксплуатации онлайн [6/84] 413751

connecting to it (if necessary, consult the distribution network by the other welding parameters i.e. arc length, working rate and

company). position, electrode diameter and quality (to store the electrodes

- Unless otherwise specified (MPGE), the welding machines are correctly, keep them in a dry place protected by their packaging or

compatible with power generating sets for voltage oscillations up to containers).

± 15%.

For correct use, the power generating set must be brought to

Procedure

steady conditions before being able to connect the inverter.

- Holding the mask IN FRONT OF THE FACE, strike the electrode tip

damage the electrode and make strike-up difficult.

It can therefore be connected to a mains outlet fitted with fuses or

- As soon as arc is ignited, try to maintain a distance from the

an automatic circuit-breaker; the special earth terminal should

workpiece equal to the diameter of the electrode in use. Keep this

be connected to the earth conductor (yellow-green) of the power

distance as much constant as possible for the duration of the weld.

supply line.

Remember that the angle of the electrode as it advances should be

Table (TAB.1) shows the recommended delayed fuse sizes in

from the weld pool to extinguish the arc.

- For welding machines without a plug (115/230V models),

connect a normalised plug (2P + T) - having sufficient capacity-

CHARACTERISTICS OF THE WELD BEAD

to the power cable and prepare a mains outlet fitted with fuses or

Fig. H

an automatic circuit-breaker; the special earth terminal should

be connected to the earth conductor (yellow-green) of the power

7. MAINTENANCE

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SWITCHED OFF AND DISCONNECTED FROM THE MAIN POWER

SUPPLY.

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(Class 1) safety system installed by the manufacturer ineffective

EXTRAORDINARY MAINTENANCE

with consequent serious risks to persons (e.g. electric shock)

EXTRAORDINARY MAINTENANCE OPERATIONS SHOULD BE

and objects (e.g. fire).

PANELS AND WORKING INSIDE THE MACHINE MAKE SURE THE

WELDING MACHINE IS SWITCHED OFF AND DISCONNECTED

CONNECTIONS MAKE SURE THE WELDING MACHINE IS

FROM THE MAIN POWER SUPPLY OUTLET.

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SWITCHED OFF AND DISCONNECTED FROM THE POWER

SUPPLY OUTLET.

If checks are made inside the welding machine while it is live, this

- Inspect the welding machine regularly, with a frequency

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MMA WELDING

Almost all coated electrodes are connected to the positive pole (+) of

- Do not direct the jet of compressed air on the electronic boards;

the power source; as an exception to the negative pole (-) for acid

On the end take a special terminal that is used to close the uncovered

- Never, ever carry out welding operations while the welding

part of the electrode.

This cable is connected to the terminal with the symbol (+)

8. TROUBLESHOOTING

Connecting the welding current return cable

IN CASE OF UNSATISFACTORY FUNCTIONING, BEFORE

Warnings:

- Turn the welding cable connectors right down into the quick

- Check that when general switch is ON the relative lamp is ON. If

connections (if present), to ensure a perfect electrical contact;

otherwise the connectors themselves will overheat, resulting in

their rapid deterioration and loss of efficiency.

jeopardise safety and result in poor welding.

- Check the mains voltage: if the value is too high or too low the

6. WELDING: DESCRIPTION OF THE PROCEDURE

- It is most important that the user refers to the maker's instructions

- Check that there is no short-circuit at the output of the machine: if

indicated on the stick electrode packaging. This will indicate the

the electrode in use and the type of the joint to be carried out: see

- Protective gas must be of appropriate type (Argon 99,5%) and

below the currents corresponding to various electrode diameters:

ø Electrode (mm) Welding current (A)

1,6 25 - 50

2 40 - 80

2,5 60 - 110

3,2 80 - 160