A bit of advice from someone who has thousands of hours experience
with welding wire in a physicly dynamic environment. First, properly
size the wire for the current load. #2 for 100A give or take depending
on the insulation(bumping 1 or 2 guages here won't kill you). You
always want to size on the high side because.. it's expensive to
replace. Welding wire has many fine conductors, composed of alloys
that resist fatigue and heat crystalizing. Welding wire, is quite
properly more expensive because it handles abuse and motion.
If your robowelder only needs 360/380 degrees of rotation, get
enough length so you can perform the rotation without too much
twist per inch of wire, but always turn it back to a start index.
C. Smith


tig does not use wire. Filler rod sometimes but not needed here.
This is basically an over lapped joint.
Here is a picture of the part that is welded on to the end of the
4130 .049" wall one inch OD tube. The turned down part goes inside
the end of the tube.

Paul Lamar
-----------------------------------
I think C. Smith is referring to your grounding wire.
Bill Schertz

Brain fad big time on my part.  Thanks Bill and sorry Craig.

Paul Lamar


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