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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 values are necessary.
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As well as being determined by the chosen current
intensity, the mechanical characteristics of the welded
join are also determined by the other welding
parameters i.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).
Procedure
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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,
this could damage the electrode and make strike-up
difficult.
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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. H).
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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
7. MAINTENANCE
________________________________________________________________________________
W A R N I N G ! B E F O R E C A R RY I N G O U T
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 EXCLUSIVEL Y
BY SKILLED OR AUTHORISED ELECTRICAL-
MECHANICAL TECHNICIANS.
________________________________________________________________________________
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,
reactance and rectifier using a jet of dry compressed air
(max. 10bar).
- Do not direct the jet of compressed air on the electronic
boards; these can be cleaned with a very soft brush or
suitable solvents.
- At the same time make sure the electrical connections
are tight and check the wiring for damage to the
insulation.
- At the end of these operations re-assemble the panels of
the welding machine and screw the fastening screws
right down.
- Never, ever carry out welding operations while the
welding machine is open.
80
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160
120
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200
Fig. I
8. TROUBLESHOOTING
IN CASE OF UNSATISFACTORY FUNCTIONING,
BEFORE SERVICING MACHINE OR REQUESTING
ASSISTANCE, CARRY OUT THE FOLLOWING CHECK:
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Check that the welding current, which is regulated by the
potentiometer with a graduated amp scale, is correct for
the diamter and electrode type in use.
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Check that when general switch is ON the relative lamp
is ON. If this is not the case then the problem is located
on the mains (cables, plugs, outlets, fuses, etc.)
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Check that the yellow led (ie. thermal protection
interruption- either over or undervoltage or short circuit)
is not lit.
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Check that the nominal intermittance ratio is correct. In
case there is a thermal protection interruption, wait for
the machine to cool down, check that the fan is working
properly.
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Check the mains voltage: if the value is too high or too
low the welding machine will be stopped.
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Check that there is no short-circuit at the output of the
machine: if this is the case eliminate the incovenience.
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Check that all connections of the welding circuit are
correct, particularly that the work clamp is well attached
to the workpiece, with no interferring material or surface-
coverings (ie. Paint).
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Protective gas must be of appropriate type (Argon
99,5%) and quantity.
_______________(D)______________
BEDIENUNGSANLEITUNG
A C H T U N G !
SCHWEISSMASCHINE LESEN SIE BITTE SORGFÄLTIG
DIE BETRIEBSANLEITUNG.
LICHTBOGEN-SCHWEISSMASCHINEN FÜR UMHÜLLTE
ELEKTRODEN (MMA) IN INDUSTRIE UND GEWERBE.
Anmerkung: Im folgenden Text wird der Begriff
"Schweißmaschine" gebraucht.
1.
ALLGEMEINE
SICHERHEITSVORSCHRIFTEN
ZUM LICHTBOGENSCHWEISSEN
Der Bediener muß im sicheren Gebrauch der
Schweißmaschine ausreichend unterwiesen sein. Er
m u ß
ü b e r
L i c h t b o g e n s c h w e i ß v e r f a h r e n , ü b e r d i e
Schutzvorkehrungen und das Verhalten im Notfall
informiert sein.
(Siehe auch die "TECHNISCHE SPEZIFIKATION IEC
oder CLC/TS 62081": INSTALLA TION UND GEBRAUCH
VON LICHTBOGENSCHWEISSANLAGEN).
- Vermeiden Sie den direkten Kontakt mit dem
Schweißstromkreis; die von der Schweißmaschine
bereitgestellte Leerlaufspannung ist unter
bestimmten Umständen gefährlich.
- Das Anschließen der Schweißkabel, Prüfungen und
Reparaturen dürfen nur ausgeführt werden, wenn die
Schweißmaschine ausgeschaltet und vom
Versorgungsnetz genommen ist.
- Bevor Verschleißteile des Brenners ausgetauscht
- 13 -
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