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Striking the arc
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 flameproof welding gloves, heavy long-sleeved shirt, cuffless trousers,
high-topped shoes and a welding helmet or shield.
Scratch the work piece with the end of electrode to start arc and then raise it
quickly about 1/8 inch gap between the rod and the work piece. See following
picture:
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 extin-
guishing. When the rod sticks to the work piece, gently rock it back and forth
to make them separate. If not, the circuit is short connection, and it will over-
load 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 figure:
Judge a good weld bead
When the trick of establishing and holding an arc has been learned, the next
step is learning how to run a good bead. The first attempts in practice will
probably fall short of acceptable weld beads. Too long of an arc will be held or
the travel speed will vary from slow to fast (see following)
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