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13 Check Quality of the Welded Joint
13.3
Blowing Effect and Remedies
With asymmetric ground connections, different material distributions or when wel-
ding at the edge of a workpiece a "blowing effect" can occur. This is an undesirable
deflection of the light arc. This results in uneven melting of the stud material, in
increased poring and undercuts in the welding area.
The blowing effect is proportional to the current amperage and can be influenced
by symmetrical connection of the ground terminals, by connecting compensating
grounds or (on welding guns with external welding cable) by turning the welding gun
about its vertical axis.
40
Blowing effect
Cause
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Remedy
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