Welcome to X3M TIG ...
Miller XMT 450
E 7018-1-H4, 3/32
Today I'm going to show you how to weld in 3F or vertical-up,
using weaving technique or zig-zag.
Fighting gravity is the main challenge in vertical-up welding—or any position that is 45 degrees or steeper.
Stick electrodes with an AWS classification of 7018 are considered the first choice
because of their low iron powder content.
7018 allows a faster weaving pattern,
freeze quickly and is less inclined to drip off the work during its liquid state.
Vertical-up is the slowest because the welder needs to combat gravity, and slow travel speed provides better penetration.
When weaving vertically up with a 7018 electrode, zigzag back and forth,
allow each puddle section to freeze so you can weld up to the next stair step.
Hold the electrode slightly uphill, and keep a short arc to gain better penetration and fusion.
Pause briefly at the sides to allow the bead below to cool.
Watch the puddle closely to make sure the slag drips off the shelf.
A good technique to practice while welding is "counting" while pausing on sides...
...1...
...2...
...1...
...2...
...1...
...2...
To continue where you stop, whip the electrode upward while maintaining the arc.
And return the electrode and apply another level to the leading edge of the weld.
One error to avoid while weaving is undercutting.
This occurs when the work is gouged without sufficient filler metal or simply put,
You don't pause long enough on sides!
One way to avoid this is by reducing current and slowing the process.
Sometimes simply reducing the puddle size improves operator control.
Good welders watch the puddle closely.
They learn to read its characteristics.
In general,
use the lower end of an electrode's amperage rating when welding vertically up or overhead.
120 to 130 Amps using1/8-in. and 90 to 95 Amps for 3/32-in. electrode.
Safety glasses, a proper helmet, gloves, long sleeves, and leather or fire-retardant clothing are a must.
Safety first...
Stick welding requires a certain mastery of skills,
vertical and overhead stick welding is more difficult than flat or horizontal.
One of the reasons the specialty is in such great demand.
Use a buffing wheel or grinder to clean your weld
from any slag, arc marks, or spatters.
Well, I hope you enjoyed watching the video
or find some useful information or technique
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Play safe...