HBS CDM 3201, Operating Manual, Page: 49 / 94

CDM 3201 Order No. BA 92-12-3321A Issue 19.09.08 49
5.8.3 Arc Blow Effect
A so called arc blow effect can occur with unproportionally distributed ground connec-
tions in relation to the base material mass, varying material distribution, or welding at
the edge of a workpiece. This is an undesired deflection of the arc. It causes a single-
sided melting of the stud material, increased pore formation, and undercuts in the
welding area.
The arc blow effect is proportional to the current and can be influenced by symmetric
installation of the ground clamps, by fitting of compensation masses, or by rotating the
welding gun around its vertical axis (applies for welding guns with external welding
cable).
Arc blow effects and some corrective actions
(according to standards, see appendix)
Cause Corrective action
5 Stud Welding Procedure
5.8 Checking the Quality of the Weld