Uni-Mig KUMJRRW200MIG Instruction Manual download pdf (Page 27)

Travel Angle - Travel angle is the right to left angle relative to the direction of welding. A travel

angle of 5°- 15° is ideal and produces a good level of control over the weld pool. A travel angle

greater that 20° will give an unstable arc condition with poor weld metal transfer, less penetration,

high levels of spatter, poor gas shield and poor quality finished weld.

Angle 5°- 15°

Not enough angle

Angle more than 20°

good level of control over the

weld pool, even at weld

less control over the weld pool

more spatter

poor control, unstable arc, less

penetration, lots of spatter

Angle to Work - The work angle is the forward back angle of the gun relative to the work piece.

The correct work angle provides good bead shape, prevents undercut, uneven penetration, poor

gas shield and poor quality finished weld.

Correct angle

Not enough angle

Too much angle

good level of control over the

weld pool, even at weld

less control over the weld pool

more spatter

poor control, unstable arc, less

penetration, lots of spatter

Stick Out- Stick out is the length of the unmelted wire protruding from the end of the contact tip.

A constant even stick out of 5-10mm will produce a stable arc, and an even current ow providing

good penetration and even fusion. Too short stick out will cause an unstable weld pool, produce

spatter and over heat the contact tip. Too long stick out will cause an unstable arc, lack of pen-

etration, lack of fusion and increase spatter.

Normal stick out

Too short

Too long

Even arc, good penetration

even fusion, good nish

Unstable arc, spatter, over

heat contact tip

Unstable arc, spatter, poor

penetration and fusion

5-10mm

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Uni-Mig KUMJRRW200MIG Instruction Manual Page 27