Panasonic YC-400TX4 Operating Instructions Manual page 22

Digital igbt controlled dctig arc welding power source
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The Schematic diagram of current control
Iw:Welding currernt
The solid line represents no pulse
The dotted line represents pulse
Ib:Initial current
Ic:Crater current
Ip:Pulse current
T1:Up Slope(0~20S)
T2:Down Slope(0~20S)
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