Product Manual

Page 48 of 58
A. Weld speed is too fast.
B. Weld speed is too slow.
C. Arc is too long.
D. Ideal weld.
A solid weld bead requires that the electrode be moved slowly and steadily along the
weld seam. Moving the electrode rapidly or erratically will prevent proper fusion or
create a lumpy, uneven bead.
⚠WARNING
ELECTRIC SHOCK CAN KILL!
To prevent ELECTRIC SHOCK, do not perform any welding while standing, kneeling, or lying directly
on the grounded workpiece.
f. Finish the bead
As the coating on the outside of the electrode burns off, it forms an envelope of
protective gases around the weld. This prevents air from reaching the molten metal and
creating an undesirable chemical reaction. The burning coating, however, forms slag.
The slag formation appears as an accumulation of dirty metal scale on the finished
weld. Slag should be removed by using a chipping hammer.
⚠WARNING
PEENING THE SLAG FROM A WELD JOINT CAUSES SMALL CHIPS OF METAL TO FLY
THROUGH THE AIR!
• Metallic chips flying through the air can cause eye injury or injury to other parts of the head, hands
or exposed portions of the body. Wear goggles or safety glasses with side shields and protect the
hands and other exposed parts of the body with protective garments, or if possible, work with a
shield between the body and the work piece.
Strain is created in the metal due to the intense heat the arc produces while welding.
Peening the weld not only removes the scale left behind in the welding but relieves the
internal strains developed by the heating and cooling process.