Laser beam
Micro plasma
Electron beam
Key hole plasma
0.05 to 25 Amps
0.05 to 20 Amps
0.05 to 15 Amps
0.05 to 10 Amps
Sufficient current
Incorrect setting electrode
Insufficient electrode diameter
Insufficient heating of base metal
Gas welding
Arc welding
Resistance welding
Jig welding