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Fenómeno
When pressing and
holding the torch
switch, the wire is
normal, but the gas
path is blocked
Pressing and holding
the torch switch, the
wire feeder does not
work, and there is no
indication of no-load
voltage
Defectos de soldadura comunes
Weld Defect
Pores
Cracks
Undercut
Slag insulation
Large spatter
Insufficient penetration
KEEP WORKiNG
KEEP WORKiNG
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Análisis de causa
Damage of magnetic valve
Foreign matter in the connection between
welding torch and magnetic valve
Damage of welding torch switch
Breakage of wire feeder control cable
Damage of control circuit board
Excess oil, rust and water on welding wire and workpiece.
Poor CO2 gas protection. (Low flow rate, insufficient silicon and manganese content in
the welding wire, impure gas, nozzle block, air leakage, and large wind)
Excess oil, rust and water on welding wire and workpiece
Improper matching between current and voltage
Excessive penetration depth and high carbon content inside base metal weld
Excessively small first weld of the multi-layer welding, improper welding sequence,
and excessive water content of the gas.
Small arc length and fast weld speed
Unsuitable position of torch, small welding current, and deep groove of the pad.
Unclear slag removal of the front weld
Too large deposition quantity and large welding swing in low and small current
Improper matching between current and voltage
Poor clean of welding wire and workpiece
Too large or small pore diameter of conductive nozzle and excessively long extension
of welding wire.
Small welding current, excessively long extension of welding wire, improper groove,
small angle and gap.
Change magnetic valve
Change or dredge
Change the welding torch
Repair the wire feeder control cable
Change control circuit board
Analysis of causes and elimination methods
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Solución
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