18
Trouble Shooting
• The defects of welding bead
Welding
bead defects
Reason
Solution
Air hole
There is too much oil, rust or water on wire
or work-piece
Clean the wire and work-piece
Poor CO
2
gas protection(less gas flow, gas
is not pure, nozzles is blocked, gas leakage,
too much wind
Improve the gas connection
The silicon and manganese in wire is not
enough
Change to suitable wire
Crack
The current and voltage doesn’t match
Adjust the welding data
too much water in the gas
change the gas flow
there is too much oil, rust and water
on wire or work-piece
clean the wire and work piece
Under cut
arc length is too small, and welding speed
is too fast
increase the arc length and slow the wel-
ding speed
torch location is not good and welding
current is too small
adjust the torch location, and increase the
welding current
base plate groove is too deep
change the shallow plate groove
Slag Inclusion
the former molten slag of welding bead is
not cleaned
remove molten slag
small current, too much weld slowly deposi-
tion, to much swing during welding
increase the current and reduce the swing
during welding
Big spatter
welding current and voltage doesn’t match Adjust the welding data
There is too much oil, rust or water on wire
or work-piece
clean the wire and work piece
wire is streching too long outside the nozzle press the torch closer to work-piece
too big diameter of the nozzle
Change to suitable nozzle
Penetration is not
enough
welding current is too small
Increase welding current
wire is streching too long outside the nozzle press the torch closer to work-piece
groove is not good, too small angle, too
small gap
change the welding technology process
• Common Failure of welding machines and solution
No
Failure
Failure reason
Solution
F1
Fan is not turning
Fan is broken
Change the fan
Loose connection
Check where is the loss connection and tighten it
other
Contact the seller
F2
Protection LED is
on
overheat of the internal
machine
Wait till the temperature is coming down and
light is off
Thermal relay is broken
Change thermal relay
other
Contact the seller
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