Miller Electric CST 250 - Manuel (Page 32)

OM-212 817 Page 28
7-3. Preparing Tungsten For AC Or DC Electrode Negative (DCEN) Welding
Ref. S-0161 / Ref. S-0162
1 Tungsten Electrode
2 Tapered End
Grind end of tungsten on fine grit,
hard abrasive wheel before weld-
ing. Do not use wheel for other jobs
or tungsten can become contami-
nated causing lower weld quality.
3
Ideal Tungsten Preparation − Stable Arc
2-1/2 Times
Electrode Diameter
1 2
1 Stable Arc
2 Flat
Diameter of this flat determines
amperage capacity.
3
Grinding Wheel
Grinding wheel should be dedi-
cated to grinding tungsten only.
4
Straight Ground
3
1
2
1 Arc Wander
2 Point
3 Grinding Wheel
Grinding wheel should be dedi-
cated to grinding tungsten only.
4
Radial Ground
2
1
4
Wrong Tungsten Preparation − Wandering Arc
4