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PARAMETERS
Current setting: The correct current, or amperage setting primarily
depends on the diameter and type of electrode selected. Select an
amperage based on the material thickness and welding position
(about 15 % less heat for overhead work compared to a flat weld).
Diameter of
welding rod (mm)
Welding current (A)
According to the adjustment of current, the wire feed rate
for MAG torch also gets adjusted.
Length of arc: The correct arc length varies with each electrode and
application. As a good starting point, arc length should not exceed
the diameter of the metal portion of the electrode. Excessively long
arcs (too much voltage) produce spatter, low deposition rates,
undercuts and sometimes porosity. Length of arc is regulated by
holding electrode tip at a suitable distance from welding piece.
Angle of travel: Hold the rod perpendicular to the joint and tilt the
top of the electrode in the direction of travel approximately 5 to
15°. For welding vertical up, use a forehand technique and tilt the
top of the rod 15° away from the direction of travel.
Speed of travel: The proper travel speed produces a weld bead with
the desired contour (or crown), width and appearance. Slow travel
speeds produce a wide, convex bead with shallow penetration.
Excessively high travel speeds also decrease penetration, create a
narrow and/or highly crowned bead, and possibly undercuts.
φ1.6
φ2.0
20-60
60-100
8
φ2.5
φ3.2
80-120
120-140
IBL M200-105
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