Preparing Tungsten For Ac Or Dc Electrode Negative (Dcen) Welding - Miller Electric CST 250 Owner's Manual

7-3. Preparing Tungsten For AC Or DC Electrode Negative (DCEN) Welding

OM-2237 Page 28
1
2-1/2 Times
Electrode Diameter
4
Ideal Tungsten Preparation − Stable Arc
4
Wrong Tungsten Preparation − Wandering Arc
2
1
2
3
1
2
3
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.
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
1 Arc Wander
2 Point
3 Grinding Wheel
Grinding wheel should be dedi-
cated to grinding tungsten only.
4 Radial Ground
Ref. S-0161 / Ref. S-0162