Telwin tecnica 164 230v acx+maschera [13/60] Welding description of the procedure
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Telwin tecnica 164 230v acx+maschera [13/60] Welding description of the procedure

Telwin tecnica 164 230v acx+maschera [13/60] Welding description of the procedure
mains voltage and frequency available at the place of
6. WELDING: DESCRIPTION OF THE
installation.
PROCEDURE
- The welding machine should only be connected to a
power supply system with the neutral conductor
- It is most important that the user refers to the maker's
connected to earth.
instructions indicated on the stick electrode packaging.
- To comply with the requirements of the EN 61000-3-11
This will indicate the correct polarity of the stick
(Flicker) standard we recommend connecting the
electrode and the most suitable current.
welding machine to interface points of the power supply
- The welding current must be regulated according to the
that have an impedance of less than Zmax =0,24 ohm.
diameter of the electrode in use and the type of the joint
- We advise against powering the welding machine by
to be carried out: see below the currents corresponding
means of generator sets. The welding machine model
to various electrode diameters:
carrying the "GE" (Generator Set) mark can be powered
ø Electrode (mm) Welding current (A)
by a generator set with a power of at least 1,5 times the
min. max.
maximum power of the welding machine.
1,6 25 - 50
2 40 - 80
- PLUG AND OUTLET:
2,5 60 - 110
- The 230V model is fitted at the factory with a power
3,2 80 - 160
supply cable and normalised plug, (2P + T) 16A/250V .
4 120 - 200
It can therefore be connected to a mains outlet fitted
- The user must consider that, according to the electrode
with fuses or an automatic circuit-breaker; the special
diameter, higher current values must be used for flat
earth terminal should be connected to the earth
welding, whereas for vertical or overhead welds lower
conductor (yellow-green) of the power supply line.
current values are necessary.
Table (TAB.1) shows the recommended delayed fuse
- As well as being determined by the chosen current
sizes in amps, chosen according to the max. nominal
intensity, the mechanical characteristics of the welded
current supplied by the welding machine, and the
join are also determined by the other welding parameters
nominal voltage of the main power supply.
i.e. arc length, working rate and position, electrode
- For welding machines without a plug (115/230V
diameter and quality (to store the electrodes correctly,
keep them in a dry place protected by their packaging or
models), connect a normalised plug (2P + T) - having
containers).
sufficient capacity- to the power cable and prepare a
- It is possible that welding with particular rutile electrodes
mains outlet fitted with fuses or an automatic circuit-
creates excessive spray: in this case we recommend
breaker; the special earth terminal should be
turning the selector on the front of the welding machine to
connected to the earth conductor (yellow-green) of the
the TIG position.
power supply line. Table (TAB.1) shows the
recommended delayed fuse sizes in amps, chosen
according to the max. nominal current supplied by the
Procedure
welding machine, and the nominal voltage of the main
- Holding the mask IN FRONT OF THE FACE, strike the
power supply.
electrode tip on the workpiece as if you were striking a
________________________________________________________________________________
match. This is the correct strike-up method.
WARNING: do not hit the electrode on the workpiece, this
WARNING! Failure to observe the above rules will
could damage the electrode and make strike-up difficult.
make the (Class 1) safety system installed by the
- As soon as arc is ignited, try to maintain a distance from
manufacturer ineffective with consequent serious risks
the workpiece equal to the diameter of the electrode in
to persons (e.g. electric shock) and objects (e.g. fire).
use. Keep this distance as much constant as possible for
________________________________________________________________________________
the duration of the weld. Remember that the angle of the
CONNECTION OF THE WELDING CABLES
electrode as it advances should be of 20-30 grades (Fig.
________________________________________________________________________________
G).
- At the end of the weld bead, bring the end of the electrode
WARNING! BEFORE MAKING THE FOLLOWING
backward, in order to fill the weld crater, quickly lift the
CONNECTIONS MAKE SURE THE WELDING MACHINE
electrode from the weld pool to extinguish the arc.
IS SWITCHED OFF AND DISCONNECTED FROM THE
POWER SUPPLY OUTLET.
CHARACTERISTICS OF THE WELD BEAD
Table (TAB. 1) gives the recommended values for the
2
Fig. H
welding cables (in mm ) depending on the maximum current
supplied by the welding machine.
________________________________________________________________________________
7. MAINTENANCE
MMA WELDING
________________________________________________________________________________
Almost all coated electrodes are connected to the positive
WARNING! BEFORE CARRYING OUT
pole (+) of the power source; as an exception to the negative
pole (-) for acid coated electrodes.
MAINTENANCE OPERATIONS MAKE SURE THE
WELDING MACHINE IS SWITCHED OFF AND
WELDING OPERATIONS WITH DIRECT CURRENT
DISCONNECTED FROM THE MAIN POWER SUPPLY.
________________________________________________________________________________
Connecting the electrode-holder clamp welding cable
On the end take a special terminal that is used to close the
uncovered part of the electrode.
EXTRAORDINARY MAINTENANCE
This cable is connected to the terminal with the symbol (+)
EXTRAORDINARY MAINTENANCE OPERATIONS
SHOULD BE CARRIED OUT ONLY AND EXCLUSIVELY
Connecting the welding current return cable
BY SKILLED OR AUTHORISED ELECTRICAL-
This is connected to the piece being welded or to the metal
MECHANICAL TECHNICIANS.
bench supporting it, as close as possible to the join being
________________________________________________________________________________
made.
This cable is connected to the terminal with the symbol (-)
WARNING! BEFORE REMOVING THE WELDING
MACHINE PANELS AND WORKING INSIDE THE
Warnings:
MACHINE MAKE SURE THE WELDING MACHINE IS
- Turn the welding cable connectors right down into the
SWITCHED OFF AND DISCONNECTED FROM THE
quick connections (if present), to ensure a perfect
MAIN POWER SUPPLY OUTLET.
electrical contact; otherwise the connectors themselves
________________________________________________________________________________
will overheat, resulting in their rapid deterioration and loss
If checks are made inside the welding machine while it
of efficiency.
is live, this may cause serious electric shock due to
- The welding cables should be as short as possible.
direct contact with live parts and/or injury due to direct
- Do not use metal structures which are not part of the
contact with moving parts.
workpiece to substitute the return cable of the welding
- Inspect the welding machine regularly, with a frequency
current: this could jeopardise safety and result in poor
depending on use and the dustiness of the environment,
welding.
and remove the dust deposited on the transformer,
- 13 -

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mains voltage and frequency available at the place of installation The welding machine should only be connected to a power supply system with the neutral conductor connected to earth To comply with the requirements of the EN 61000 3 11 Flicker standard we recommend connecting the welding machine to interface points of the power supply that havean impedance of less than Zmax 0 24 ohm We advise against powering the welding machine by means of generator sets The welding machine model carrying the GE Generator Set mark can be powered by a generator set with a power of at least 1 5 times the maximum power of the welding machine PLUGANDOUTLET The 230V model is fitted at the factory with a power supply cable and normalised plug 2P T 16A 250V It can therefore be connected to a mains outlet fitted with fuses or an automatic circuit breaker the special earth terminal should be connected to the earth conductor yellow green of the power supply line Table TAB 1 shows the recommended delayed fuse sizes in amps chosen according to the max nominal current supplied by the welding machine and the nominal voltage of the main power supply For welding machines without a plug 115 230V models connects normalised plug 2P T having sufficient capacity to the power cable and prepare a mains outlet fitted with fuses or an automatic circuit breaker the special earth terminal should be connected to the earth conductor yellow green of the power supply line Table TAB 1 shows the recommended delayed fuse sizes in amps chosen according to the max nominal current supplied by the welding machine and the nominal voltage of the main power supply A WARNING Failure to observe the above rules will make the Class 1 safety system installed by the manufacturer ineffective with consequent serious risks to persons e g electric shock and objects e g fire CONNECTION OF THEWELDING CABLES A WARNING BEFORE MAKING THE FOLLOWING CONNECTIONS MAKE SURE THEWELDING MACHINE IS SWITCHED OFF AND DISCONNECTED FROM THE POWER SUPPLY OUTLET Table TAB 1 gives the recommended values for the welding cables in mm depending on the maximum current supplied by theweldingmachine MMA WELDING Almost all coated electrodes are connected to the positive pole of the power source as an exception to the negative pole for acid coated electrodes WELDING OPERATIONSWITH DIRECT CURRENT Connecting theelectrode holder clamp welding cable On the end take a special terminal that is used to close the uncovered part of the electrode This cable I s connected to the te rm Inal with the symbo I Connecting the welding current return cable This is connected to the piece being welded or to the metal bench supporting it as close as possible to the join being made This cable isconnected to the terminal with the symbol Warnings Turn the welding cable connectors right down into the quick connections if present to ensure a perfect electrical contact otherwise the connectors themselves will overheat resulting in their rapid deterioration and loss of efficiency The welding cables should be as short as possible Do not use metal structures which are not part of the workpiece to substitute the return cable of the welding current this could jeopardise safety and result in poor welding 13 6 WELDING DESCRIPTION OF THE PROCEDURE It is most important that the user refers to the maker s instructions indicated on the stick electrode packaging This will indicate the correct polarity of the stick electrodeandthemostsuitablecurrent The welding current must be regulated according to the diameter ofthe electrode in use and the type of tne joint to be carried out see below the currents corresponding to variouselectrode diameters o Electrode mm Welding current A min max 1 6 25 50 2 40 80 2 5 60 110 3 2 80 160 4 120 200 The user must consider that according to the electrode diameter higher current values must be used for flat welding whereas for vertical or overhead welds lower current valuesare necessary As well as being determined by the chosen current intensity the mechanical characteristics ofthe welded join are also determined by the other welding parameters r e arc length working rate and position electrode diameter and quality to store the electrodes correctly keep them in a dry place protected by their packaging or containers It is possible that welding with particular rutile electrodes creates excessive spray in this case we recommend turning the selector on the front of the welding machine to the TIG position Procedure Holding the mask IN FRONT OF THE FACE strike the electrode tip on the workpiece as if you were striking a match This is the correct strike up method WARNING do not hit the electrode on the workpiece th is could damage the electrode and make strike up difficult As soon as arc is ignited try to maintain a distance from the workpiece equal to the diameter of the electrode in use Keep this distance as much constant as possible for the duration of the weld Remember that the angle of the electrode as it advances should be of 20 30 grades Fig 6 At the end of the weld bead bring the end of the electrode backward in order to fill the weld crater quickly lift the electrode from the weld pool to extinguish the arc CHARACTERISTICS OF THE WELD BEAD Fig H 7 MAINTENANCE A WARNING BEFORE CARRYING OUT MAINTENANCE OPERATIONS MAKE SURE THE WELDING MACHINE IS SWITCHED OFF AND DISCONNECTED FROM THE MAIN POWER SUPPLY EXTRAORDINARY MAINTENANCE EXTRAORDINARY MAINTENANCE OPERATIONS SHOULD BE CARRIED OUT ONLY AND EXCLUSIVELY BY SKILLED OR AUTHORISED ELECTRICAL MECHANICALTECHNICIANS A WARNING BEFORE REMOVING THE WELDING MACHINE PANELS AND WORKING INSIDE THE MACHINE MAKE SURE THE WELDING MACHINE IS SWITCHED OFF AND DISCONNECTED FROM THE MAIN POWER SUPPLY OUTLET If checks are made inside the welding machine while it is live this may cause serious electric shock due to direct contact with live parts and or injury due to direct contact with moving parts Inspect the welding machine regularly with a frequency depending on use and the dustiness of the environment and remove the dust deposited on the transformer

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