Daihen varstroj VARMIG 231-i LCD, Owner'S Manual, Page: 53 / 100

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Welding current (wire feed speed)
Travel speed
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 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 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 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.
Establishing the Arc and Making Weld Beads
Before attempting to weld on a finished piece of work, it is recommended that practice welds be made on a
sample metal of the same material as that of the finished piece
The easiest welding procedure for the beginner to experiment with MIG welding is the flat position. The
equipment is capable of flat, vertical and overhead positions.
Longitudinal Angle