PROBLEM TO BE SOLVED: To propose a technology with which welding conditions in a welding apparatus can be adjusted in the course of actual welding and set to optimum welding conditions in a short period of time, without greatly modifying an existing arc welding system, and further the welding conditions can be investigated easily.;SOLUTION: The invented arc welding system 10 comprises a control system 31 which produces welding signals on the basis of one or more of welding conditions memorized beforehand, an arc welding condition adjusting device 41 which corrects the welding signals produced by the control system 31 to corrected welding signals, and a welding apparatus 60 which performs arc welding on the basis of the corrected welding signals corrected by the arc welding condition adjusting device 41 so that the correction value of the corrected welding signals by the arc welding condition adjusting device 41 can be changed in the course of arc welding by the welding apparatus 60.;COPYRIGHT: (C)2010,JPO&INPIT
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