Scully, Scott, Murphy & Presser
Control of welding arc length
 An arc length controlling method that is used in the practice of the pulsed welding in which welding is carried out by feeding an consumable electrode at a substantially constant speed while the pulse frequency f is set to a predetermined value. This method is carried out by effecting a welding after the counting time Tr and the target short-circuiting frequency Nr have been set, detecting the detected short-circuiting frequency Nk, and controlling the output voltage Vt to a value effective to allow the detected short-circuiting frequency Nk to be equal to the target short-circuiting frequency Nr. 
Daihen Corporation
B
B23K
inventional
Norihito Honjyun Tomoyuki Tuneo Waichi
Takahashi Tong Ueyama Takeda Nishikawa