25OPERATING MANUAL
Problem Analysis Solutions
Excessive ceramic
cup usage
1. Excess duty of cycle
torch
2. Too small a nozzle bore
for size of tungsten
3. Thermal shock
1. Change torch
2. Increase bore of nozzle
3. Increase bore of nozzle or
warm ceramic cup slowly
from cold
Striking the arc method following step:
1. Open the gas valve on the Lift TIG torch.
2. Tilt the torch at an angle, resting the alumina cup on the work piece,
3. Rotate the torch to a vertical position, as you do so the tungsten should make
contact with the work piece and start the arc.
4. As soon as the arc is formed lift the torch from the work piece, by 2-3mm,
to prevent the tungsten from sticking to the work and contamination
of the tungsten.
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