4 FIG.
29 - Effect of Varying the Welding Speed 14.4
INCHES PER MINUTE 40
Volts 1200 Amperes WELDING
SPEED SQUARE
GROOVE BUTTJOINT
1/2-in. Plate LOW
CORRECT 21
INCHES PER MINUTE 29
Volts 500 Amperes 30
INCHES PER MINUTE 29
Volts 500 Amperes HIGH
39 INCHES PER MINUTE
29 Volts 500 Amperes
Result: Too little wire deposited
per unit length of weld. Both
welds undercut. Bottom weld
has insufficient reinforcement.
Result: Welds are
satisfactory in all respects.
Result: Too much wire deposited
per unit length of weld. Fusion
zone too wide and poorly shaped.
45o
SINGLE-VEE GROOVE
BUTT JOINT
1-1/2 in. Plate
8.75 INCHES PER MINUTE
40 Volts 1200 Amperes
12.5 INCHES PER MINUTE
40 Volts 1200 Amperes
