Uni-Mig KUMJRRW200MIG Instruction Manual download pdf (Page 26)

Basic MIG Welding .

10°

wire pointed ahead of bead wire pointed back into bead

travel direction travel direction travel direction

(A) Push Technique

(B) Gun Perpendicular (C) Drag Technique

10°

at even weld prole

light penetration

narrower weld prole

even penetration

narrow higher weld prole

more penetration

Good weld quality and weld prole depends on gun angle, direction of travel, electrode extension

(stick out), travel speed, thickness of base metal, wire feed speed (amperage) and arc voltage.

To follow are some basic guides to assist with your setup.

Gun Position - Travel Direction, Work Angle

Gun position or technique usually refers to how the wire is directed at the base metal, the angle

and travel direction chosen. Travel speed and work angle will determine the characteristic of the

weld bead prole and degree of weld penetration.

Push Technique - The wire is located at the leading edge of the weld pool and pushed towards

the un-melted work surface. This technique offers a better view of the weld joint and direction of

the wire into the weld joint. Push technique directs the heat away from the weld puddle allowing

faster travel speeds providing a atter weld prole with light penetration - useful for welding thin

materials. The welds are wider and atter allowing for minimal clean up / grinding time.

Perpendicular Technique - The wire is fed directly into the weld, this technique is used prima-

rly for automated situations or when conditions make it necessary. The weld prole is generally

higher and a deeper penetration is achieved.

Drag Technique - The gun and wire is dragged away from the weld bead. The arc and heat is

concentrated on the weld pool, the base metal receives more heat, deeper melting, more penetra-

tion and the weld prole is higher with more build up.

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Uni-Mig KUMJRRW200MIG Instruction Manual Page 26