21
•
Machine stuck on minimum amps when welding although higher amperage has been
set
Make sure machine has not been set to 4-way operation as when in this mode when you
press torch switch you get minimum amps and when you let go of switch machine will go to
maximum amps set.
•
When using foot pedal machine is stuck on minimum amps
Make sure 2/4-way switch is in 2 way position, the remote foot pedal will not work in the 4-
way position, this is for torch switch operation only.
•
Arc ‘Flutters’ when TIG welding
1. Tungsten electrode may be too large in diameter for the current setting.
2. Tungsten not sharp when in DC mode
3. Gas shielding flow may be low or high, check gas flow, reduce tungsten stick out
beyond ceramic
4. Check for leaks in torch & gas hoses
•
Black areas along weld bead
1. Clean any oily or organic contamination from the work piece
2 Tungsten electrode contaminated. Replace or sharpen
3 Check for leaks or contamination on gas hoses & connections.
4 Gas flow may be insufficient, increase gas flow, reduce tungsten stick out from ceramic
•
Weak HF – Poor arc striking – welding output normal
1 Check torch and earth connections – is torch cable insulation in good condition.
2 Check for leaks or contamination on gas hoses & connections.
3 Gas flow may be insufficient, increase gas flow, reduce tungsten stick out from ceramic
4 Keep output cables short as possible
•
HF spark is present at the tungsten electrode but unable to start welding arc,
Machine has normal welding output
1 Tungsten may be contaminated - replace or sharpen
2 The current may be set too low
3 Tungsten may be too large for process
4 Gas flow may be insufficient, increase gas flow, reduce tungsten stick out from ceramic
