Preparing Tungsten For Ac Or Dc Electrode Positive (Dcep) Welding; Preparing Tungsten For Dc Electrode Negative (Dcen) Welding - Miller Electric PC-300 Owner's Manual

6-2. Preparing Tungsten For AC Or DC Electrode Positive (DCEP) Welding

6-3. Preparing Tungsten For DC Electrode Negative (DCEN) Welding

1
1-1/2 Times
Electrode Diameter
2
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 Balled End
Y Understand
and follow
safety symbols at start of
Section NO TAG before pre-
paring tungsten.
Ball end of tungsten before welding
by applying either an ac amperage
slightly higher than what is recom-
mended for a given electrode diam-
eter (see Section 6-1), or a dc
electrode positive amperage.
Ref. S-0161
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
4 Straight Ground
1 Arc Wander
2 Point
3 Grinding Wheel
4 Radial Ground
Ref. S-0161 / Ref. S-0162
OM-898 Page 15