Yeswelder YWA-160, Руководство пользователя, Страница: 17 / 24

TROUBLESHOOTING
STICK WELDING ISSUES
PROBLEM
Poor starting
Stick electrode
"blasts Off" when
arc is struck.
Electrode "stick" in
weld puddle
Porosity - small cav
ities or holes result
ing from gas pock-
ets in weld metal
Excessive Spatter -
scattering Of molten
metal particles
that
cool to solid form
near weld bead.
Incomplete Fusion
failure of weld metal
to fuse completely
with base metal or a
preceeding weld
bead.
Lack Of Penetration
shallow fusion be-
tween weld metal
and base metal
Burn Through
weld metal melting
completely through
base metal resulting
in holes where no
metal remains.
POSSIBLE CAUSE
Poor work clamp connection
Current may be set too high for etedrode
size
Current may be set too low for electrode
Size.
Arc length too long
Damp electrode
Workpiece dirty
Amperage too high for electrode
Arc length too long or voltage too high.
Insufficient heat input.
Improper welding technique
Workpiece dirty
Improper joint preparation
Improper weld technique.
Insufficient heat input.
Excessive heat input
-14-
COURSE OF ACTION
Check and secure work connection
Adjust current.
Adjust current.
Reduce arc length
Use dry electrode
Remove all grease, Oil, moisture, rust, paint, coatings, slag,
and dirt from work surface before welding
Decrease amperage or select larger electrode.
Reduce arc length or voltage
Increase amperage Select larger electrode and increase
amperage
Place stringer bead in proper location at joint during welding
Adjust work angle or widen groove to access bottom during
welding
Momentarily hold arc on groove side walls when using
weaving technique
Keep arc on leading edge of weld puddle
Remove all grease, oil, moisture, rust, paint, coatings, slag,
and dirt from work surface before welding
Material too thick. Joint preparation and design must pro-
vide access to bottom Of groove
Keep arc on leading edge of weld puddle
Increase amperage Select larger electrode and increase
amperage
Reduce travel speed
Select lower amperage. Use smaller electrode.
Increase or maintain steady travel speed