OM-2237 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
Summary of Contents for CST 250
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Page 30: ...OM 2237 Page 26 SECTION 6 ELECTRICAL DIAGRAMS Figure 6 1 Circuit Diagram 206 171 C...
Page 33: ...OM 2237 Page 29 Notes...
Page 42: ...Notes...
