Motoman XRC 2001, Operator'S Manual

Page: 61 / 387

5.4 Welding Test
5-9
Convex bead:
Part of the fillet weld has a
swelled bead surface. It
can be seen in an upward
weld at vertical position and
an incline position. • Welding current is too high
• Arc voltage is too low
• Welding speed is too slow
or too fast
• Lower the welding speed.
• Adjust the voltage.
Concave bead:
Part of the fillet weld has a
dented bead surface. It can
be seen in a downward
weld at a vertical position or
incline position • Welding current is too high
• Arc voltage is too high
• Welding speed is too slow
• Lower the welding speed.
• Adjust the voltage appropriately.
Meandering of beads:
State in which welding
bead is shaped like a
snake. • The welding wire is bent
and twisted.
• The welding chip’s hole
diameter is growing larger.
• Magnetic blow influences
welding.
• Shorten the wire length.
• Use a pail.
• Exchange old tips for new tips.
• Change earthing condition.
• Change welding direction.
Welding Defect Reason for Occurrence Correction Method