Arc stability

Arc stability is determined in high current welding tests in two ways: by measuring the vibration, welding current and voltage; and by recording the brightness variations of the arc. The test set-up used for measuring the arc stability is shown  below.

High current welding tests OK AristoRod 12.50

Vibration is measured by a sensor placed on the torch while, simultaneously, current and voltage are recorded in ms by the power source control unit. Variations in the brightness of the arc are extracted from high speed videos recording actual arc behavior.

High current welding tests OK AristoRod 12.50

OK AristoRod 12.50

Standard copper coated wire

Standard copper coated wire

The figures above shows typical results for OK AristoRod™ and copper coated wire. The vibration, measured in m/s2, is substantially higher for the copper coated wire, while voltage and welding current vary within a larger scatterband. The green area shows the voltage and current window. Voltage variations are, of course, unavoidable, because of the droplet split-off. However, voltage variance is higher with copper-coated wire. Current variance is even more pronounced, due to the less stable arc.

This is confirmed by the brightness variations (grey scale variation) shown in the graph below. The light intensity variations of the arc during one second were recorded with a high speed camera taking 3000 frames per second. Number 1 shows OK AristoRod™ and 2-10 various copper coated wires available in the global marketplace.

Optical stability

From all wires tested, OK AristoRod™ clearly gave the highest arc stability. High speed videos reveal a more stable arc with less spatter.


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