Ferax 1600 m gng Instruction Manual - 17.0 Welding

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17.0 WELDING

DISCONTINUITIES AND

DEFECTS

• Defect: The wire pushes the torch back from the

workpiece.

Cause: Excessive wire speed.

• Defect: The wire sticks on the contact tip.

Cause: Low wire feeding.

• Defect: Excessive welding spatters

Cause: Erratic wire feeding, improper torch position

(too inclined)

• Defect: Arc is unstable

Cause: Low voltage, erratic wire feeding, inadequate

gas flow rate.

• Defect: Inadequate penetration.

Cause: Welding current too low, excessive travel

speed, torch travel direction should be reversed.

• Defect: Cracking

Cause: Base material dirty, welding current too low,

excessive welding voltage, rust on the electrode wire.

• Defect: Porosity

Cause: Cylinder of shielding gas empty, leaky gas

hoses, wrong adjustment of gas flow rate.