Thermal Arc Fabricator 181i Operating Manual page 62

Fabricator 181i
Secondary Adjustable Variables
These variables cause changes in primary adjustable variables which in turn cause the desired change in the bead
formation. They are:
1. Stick-out (distance between the end of the contact tube (tip) and the end of the electrode wire). Maintain
at about 3/8" (10mm) stick-out
2. Wire Feed Speed. Increase in wire feed speed increases weld current, Decrease in wire feed speed decreases
weld current.
3. Nozzle Angle. This refers to the position of the welding MIG Gun in relation to the joint. The transverse
angle is usually one half the included angle between plates forming the joint. The longitudinal angle is
the angle between the centre line of the welding MIG Gun and a line perpendicular to the axis of the weld.
The longitudinal angle is generally called the Nozzle Angle and can be either trailing (pulling) or leading
(pushing). Whether the operator is left handed or right handed has to be considered to realize the effects
of each angle in relation to the direction of travel.
BASIC WELDING GUIDE
Gas Nozzle
Tip to
Work Distance
Average Arc Length
Electrode Stick-Out
Figure 4-8
Longitudinal
Angle
Axis of Weld
Transverse and Longitudinal
Nozzle Axes
Figure 4-9
Direction of Gun Travel
90°
Leading or "Pushing"
Angle
(Forward Pointing)
Nozzle Angle, Right Handed Operator
Figure 4-10
4-4
Contact Tip (Tube)
Electrode Wire
Actual Stick-out
Art # A-08997_AD
Transverse
Angle
Art # A-08998_AB
Trailing or "Pulling"
Angle
(Backward Pointing)
Art # A-08999_AC
Manual 0-5191