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BURNBACK SETTING
Burnback is a feature that continues to supply power to the welding wire after the torch trigger
is release, but stops the welding wire from feeding. This provides time for the welder to remove
the welding wire from the weld pool before it solidifies. The setting is preset by the factory.
SMART-SET
Smart-Set uses pre-defined welding settings based on the type of Gas (Co2 or an Argon/Co2
mixture) and the wire diameter (0.030 or 0.035 in.). Turn the knob (F) to the selected pairing
and Smart-Set will configure the remaining parameters for optimal welding. You can begin
welding immediately.
WIRE FEED ON DEMAND
The welding unit has a feed-on-demand system to prevent wire waste. Initially the wire is slowly
fed through the torch, regardless of the set speed. Once an arc is struck, the unit feeds the wire
at the user's selected speed.
ARC (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. 24)
2.
The heat of the arc melts the surface of the base metal to form a molten pool at the end
of the electrode.
3.
The melted electrode metal is transferred across the arc into the molten pool and
becomes the deposited weld metal.
The deposit is covered and protected by a slag, which comes from the electrode
4.
coating.
The arc and immediate area are enveloped by an
5.
atmosphere of protective gas.
6.
Hold the electrode slightly above the workpiece to
maintain the arc while travelling at an even speed
to create an even weld deposition (Fig. 25)
7.
To finish the weld, break the arc by quickly
snapping the electrode away from the workpiece
(Fig. 26).
8.
Wait for the weld to cool and carefully chip away the
slag to reveal the weld metal underneath (Fig. 27).
Manual metal arc (stick) electrodes have a solid
metal wire core and a flux coating. These electrodes
18
145A MULTI-PROCESS MIG-ARC-TIG WELDER
Fig. 24
Fig. 26
For technical questions call 1-800-665-8685
V1.0
Fig. 23
Fig. 25
Fig. 27
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