Oerlikon CITOARC 1900C FORCE Instruction De Securite D'emploi Et D'entretien page 7

TYPES OF MALFUNCTIONING/ WELDING FAULTS – CAUSES – REMEDIES
TYPES OF MALFUNCTIONING
WELDING FAULTS
Excessive jets.
Craters.
Inclusions.
Insufficient penetration.
Sticking.
Blowholes and porosity.
Cracks.
In TIG the electrode melts.
POSSIBLE CAUSES
Welding arch too long.
Welding current too high.
Excessive Arc Force.
Rapid moving away of electrode on lifting.
Poor cleaning or distribution of passes. Faulty electrode movement.
High feed speed. Welding current too low.
Welding arc too short.
Current too low.
Wet electrodes. Long arc. Incorrect torch polarity.
Current too high. Dirty materials.
Incorrect torch polarity. Type of gas unsuitable.
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CONTROLS AND REMEDIES
Wrong torch polarity, lower the current values.
Wrong torch polarity, lower the current values.
Lower the Arc Force rate.
Increase the set current value.
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