In this section, we will refer to welding machines that use electrodes and that only have AC (alternating current) output.
The welding quality of this type of machines is not optimal, not by the operator, but by the output of the current.
This type of welding machines with only AC (alternating current) output, as the name implies, causes the current to alternate in time. Since is not a constant current, the delivery of heat varies over time.
What does this mean, when talking about welding? In a few words, that the welding will not be even. You could do good welding points, but not long cords.
These would be asymmetric, since the current varies from positive to negative and that is perceived in the welding, in the electric arc.
When this happens, not having a weld arc or a constant heat delivery, that makes the operator try harder so the welding is well done.
To solve this, it is best to have equipment that is both AC and DC (direct current), because the latter, being a constant current, provides a fixed power that allows to have homogeneous cords.
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