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Item Metadata only Digitalization evaluation of welder performance(Mahidol University. Mahidol University Library and Knowledge Center, 2024) Seamkong, Kuoch, 1992-; Eakkachai Warinsiriruk; Tuangyot Supeekit; Thanakorn Naenna ; Sutep Joy-A-KaThis research studied the natural hand-movement of welder in Gas Metal Arc Welding (GMAW) process. In terms of semi-automatic GMAW process, welder skills could affect the weld bead quality. To monitor torch movement and arc stability of manual... welding, the arc signal of current and voltage from the welding machine were utilized to observe on hand movement of welder. The research involved three main stages. First, was simulation of the hand-fluctuation using robot welding, then the Cyclogram