Impax IM-MIG120 Instruction Manual page 30

MIG OPERATION
Fig 24
2-3mm
When welding material from 7mm to 30mm thick
prepare the material as shown in Fig.25 filling up
the space with several layers of weld.
Fig 25
60º
2-3mm
5
3
When welding together material over 30mm in
thickness prepare the material as shown in
Fig.26 filling up the space with several layers of
weld.
Fig 26
60º
2-3mm
Disconnect the welder from the mains power
supply before changing or removing wire reels.
Use pliers to move the welded pieces as they
will be extremely hot.
Note: As MIG welding is an aquired skill, it is
strongly advised that, if you are not fully familiar
with this type of welding, you practice on a
7mm
>30mm
6
4
2
1
>30mm
piece of material with the same characteristics
as that of your workpiece until you are satisfied
with the result, and you have fine tuned your
welder to produce a satisfactory weld.
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.
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.
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.
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