Yeswelder YWM-200, Руководство оператора

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Check and secure work connection Poor work clamp connection.
PROBLEM POSSIBLE CAUSE COURSE OF ACTION
Poor starting.
TROUBLESHOOTING
STICK WELDING ISSUES
Adjust current.
Current may be set too low for electrode
size.
Adjust current.
Current may be set too high for electrode
size.
S t i c k e l e c t r o d e
“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.
Reduce arc length. Arc length too long.
Use dry electrode. Damp electrode.
Remove all grease, oil, moisture, rust, paint, coatings, slag,
and dirt from work surface before welding.
Workpiece dirty.
Decrease amperage or select larger electrode. Amperage too high for electrode.
Reduce arc length or voltage. Arc length too long or voltage too high.
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
p r e c e e d i n g w e l d
bead.
Increase amperage. Select larger electrode and increase
amperage.
Insufficient heat input.
Place stringer bead in proper location at joint during welding.
Improper welding technique.
Keep arc on leading edge of weld puddle.
Workpiece dirty.
changed the word “work” to “electrode” to help better
exapling angle when welding various positions.
Momentarily hold arc on groove side walls when using
weaving technique.
Remove all grease, oil, moisture, rust, paint, coatings, slag,
and dirt from work surface before welding.
Lack Of Penetration
− shallow fusion be-
tween weld metal
and base metal.
Improper joint preparation.
Material too thick. Joint preparation and design must pro-
vide access to bottom of groove.
Keep arc on leading edge of weld puddle. Improper weld technique.
Insufficient heat input.
Increase amperage. Select larger electrode and increase
amperage.
Reduce travel speed.
B u r n T h r o u g h −
weld metal melting
completely through
base metal resulting
in holes where no
metal remains.
Select lower amperage. Use smaller electrode.
Excessive heat input.
Increase or maintain steady travel speed.