17OPERATING MANUAL
Welding techniques
The best way to teach yourself how to weld is with short periods of practice at regular
intervals. All practice welds should be done on scrap metal that can be discarded.
Do not attempt to make any repairs on valuable equipment until you have satised
yourself that your practice welds are of good appearance and free of slag or gas
inclusions.
Holding the electrode
The best way to grip the electrode holder is the way that feels most comfortable to
you. To Position the Electrode to the work piece when striking the initial arc, it may
be necessary to hold the electrode perpendicular to the work piece. Once the arc is
started the angle of the electrode in relation to the work piece should be between
10 and 30 degrees. This will allow for good penetration, with minimal spatter.
Striking the arc
WARNING
!
EXPOSURE TO A WELDING ARC IS EXTREMELY HARMFUL TO THE
EYES AND SKIN.
Never strike an arc or begin welding until you have adequate
protection. Wear ame proof welding gloves, heavy long-sleeved
shirt, trousers without turn-ups, safety shoes and a welding
helmet or face mask.
Scratch the work piece with the end of electrode to start
arc and then raise it quickly about 3.2mm gap between
the rod and the work piece. See picture (right).
It is important that the gap be maintained during the
welding process and it should be neither too wide or too
narrow. If too narrow, the rod will stick to the work piece.
If too wide, the arc will be extinguished. It needs much
practice to maintain the gap. Beginners may usually get
sticking or arc extinguishing. When the rod sticks to
the work piece, gently rock it back and forth to make
them separate. If not, the circuit is shorted, and it will
overload the welder. A good arc is accompanied by a
crisp, cracking sound. The sound is similar to that made
by eggs frying. To lay a weld bead, only 2 movements
are required; downward and in the direction the weld is
to be laid, as in following gure:
1/8"
3.2mm
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