Tweco 300 DC Arcmaster - Manual (Page 55)

ARCMASTER 300 ACDC
February 22, 2006 10-5
A Small electrodes used on
heavy cold plate.
A Use larger electrodes and
pre-heat the plate.
B Welding current is too low. B Increase welding current.
C Wrong electrode angle. C Adjust angle so the welding
arc is directed more into the
base metal.
D Travel speed of electrode is
too high.
D Reduce travel speed of
electrode.
E Scale or dirt on joint
surface.
E Clean surface before
welding.
Remedy
4 Portions of the weld
run do not fuse to the
surface of the metal or
edge of the joint.
Description Possible Cause
Table 10-2 (continued): Stick Welding Problems
Lack of fusion caused by dirt,
electrode angle incorrect,
rate of travel too high
Lack of side fusion, scale
dirt, small electrode,
amperage too low
Lack of inter-run
fusion
Lack of root fusion
Art # A-04992
Figure 10-2: Example of lack of fusion