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5. In order to produce a satisfactory weld, the controls may be fine tuned as
required. This will come with practice.
NOTE: MIG welding is an acquired skill, it is strongly advised that, if you
are not fully familiar with this type of welding, you practice on a
piece of material with the same characteristics as your
workpiece, until you are satisfied with the result, and you have
fine tuned your welder to produce a satisfactory weld.
NOTE: One of the problems experienced with novice welders, is the
welding wire sticking to the contact tip. This is as a result of the
wire feed speed being too slow. It is always better therefore to
start with too high a speed, and back off slightly, to avoid the
possibility of the wire welding itself to the tip. This is the reason
position 6 is recommended for start up.
NOTE: The Wire Feed control is for fine tuning the wire speed. The speed
of wire delivery will increase automatically as the current is
increased. Therefore, once the ideal speed is achieved by fine
tuning, it should not be necessary to adjust this control when the
welding current is changed.
NOTE: Listen to the sound made. An irregular crackling sound denotes
too high a wire speed. Decrease the speed until a regular, strong
buzzing sound is heard.
THERMAL OVERLOAD
The ‘Thermal Overload’ shuts off the
welder when it becomes too hot,
due to the duty cycle being
exceeded. This is to prevent any
damage to the machine.
When this occurs, the warning lamp
shown will glow (amber). Allow the
welder to cool, until the amber light
extinguishes before resuming work.
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