PRO-POINT ARC 170 Manuel D'utilisation page 25

V1.0
the given range. In case that the input voltage or amperage
exceeds the stipulated value, it is possible to damage the
equipment's components. Please ensure your primary power
supply is correct (See Specifications).
MMA (MANUAL METAL ARC) WELDING
One of the most common types of arc welding is manual
metal arc welding (MMA) or stick welding. An electric
current is used to strike an arc between the base material
and a consumable electrode rod or 'stick'. The electrode rod
is made of a material that is compatible with the base
material being welded and is covered with a flux that gives
off gaseous vapours that serve as a shielding gas and
providing a layer of slag, both of which protect the weld area
from atmospheric contamination. The electrode core itself
acts as filler material the residue from the flux that forms a
slag covering over the weld metal must be chipped away
after welding.
1. Strike the electrode on the workpiece
to create the arc and hold the
electrode steady to maintain the arc
(Fig. 9)
2. The heat of the arc melts the surface
of the base metal to form a molten
pool at the end of the electrode.
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ARC 170 DUAL VOLTAGE ARC/TIG WELDER 8611295
Fig. 8
Fig. 9
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