在螺柱焊時，弧柱的軸線偏離螺柱軸線，這種現象稱爲電弧偏吹。
When the stud welding, arc column axis deviation stud axis, this phenomenon is called electric arc blow.
在螺柱焊時，計入固有磁場的影響磁場有：金屬钣材的帶電磁場；鐵磁物質的分布量和焊鉗電纜的磁場
。
When stud welding, included in the intrinsic magnetic field the influence of magnetic field are: metal coin material with electromagnetic field; The distribution of ferromagnetic material and the magnetic field of electrode holder cable.
電弧偏吹常造成電弧不能穩定燃燒，使焊縫成形變壞，嚴重時甚至使焊接無法進行。
Arc blow often cause arc not stable combustion, the weld deformation bad, serious when even cannot make the welding place.