ESAB PLASMAWELD 402 - TIG Welding Procedure; TIG Pilot Arc Welding Procedure

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B. TIG Welding
1. Position of poti h defines the duration of up-slope, while time of down-slope is set at
poti
m.
2. Depending on the position of switch i, the machine can be operated in 2- or 4-stroke
mode:
2-stroke mode Symbol
1. Press torch- or foot-switch = Welding
2. Release torch- or foot-switch = End of welding and gas post-flow
4-stroke mode Symbol
1. Press torch- or foot-switch = Gas pre-flow and HF
2. Release torch- or foot-switch = Welding with current up-slope
3. Press torch or foot-switch = Current down-slope
4.Release torch- or foot-switch = End of welding and gas post-flow
C. TIG pilot arc welding
Welding process runs as with Plasma welding
D. MMA Welding
1. Hot-Start
When switch-potentiometer
h is in position 0, current drops down immediately from
maximum value of power supply to preset value.
2. Soft-Start
When switch-potentiometer
h is turned clockwise, soft-start function is switched on.
Up-slope time from basic current to preset welding current is infinitely variable.