19
flat
Straight
Ground
Stable arc
Arc wander
Radial
Ground
Do not grind the electrode radially or ‘arc
wander’ may occur
point
TIG ELECTRODES
In order to obtain the optimum arc striking performance with the Miniarc 150 APS it is recommended that 2% Thori-
ated tungstens are exclusively used (red tip).
Maximum Electrode Ratings d.c.
Electrode Dia. Current Range
.040” 5A -70A
1/16” 50A - 150A
Shielding Gas
To prevent oxidation, always purge the argon hose before welding and maintain the argon flow until the tungsten has
cooled sufficiently after welding has ceased.
ALWAYS WEAR GOGGLES AND A MASK
WHEN GRINDING ELECTRODES.
SECTION 3 OPERATION
Figure 3.5
Figure 3.6
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