19
Parts & Service: 020 8988 7400 / E-mail: [email protected] or [email protected]
OPERATING THE WELDER
PREPARE THE WORKPIECE
The welded area must be clean. Coatings, plating or corrosion must be
removed. If not, you will not be able to achieve a good quality weld.
Attach the earth clamp to the workpiece as near to the point of weld as
possible.
OPERATION
1. With the welding current set and the wire trimmed, set the wire feed
control to 6.
2. Plug the machine into the mains supply and switch on.
3. Cover your face with a welding mask or welding shield.
• This is essential.
4. Lower the torch to the workpiece with one hand and approach the work
with the torch tip at an angle of about 35
o
and pull the trigger fully.
• As the wire touches the workpiece an arc will be struck.
5. In order to produce a good quality weld, the controls can 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
CAUTION: THE DUTY CYCLE MUST BE FOLLOWED TO PREVENT THE
THERMAL OVERLOAD PROTECTION FROM OPERATING.
Содержание MIG 240
Страница 28: ......
