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Dynamic Arc

 The Dynamic Arc function makes it possible to keep the product of Voltage x current constant. The power source increases increases the welding current as the arc voltage decreases and reduces the welding current if the arc voltage increases.

The Dynamic Arc function allows an increase of the welding current when the arc voltage decreases and vice versa (the power source reduces the welding current if the arc voltage increases).

The Dynamic Arc value can be adjusted from a minimum of 10 Ampere to a maximum of 50 Ampere per each variation of 1 Volt, whether positive or negative.

This value must be set in accordance with the thickness of the base material, and the type of processing that has to be carried out (recommended values between 1A and 20A for thin gauges and values between 20A e 50A for thicker gauges). It follows that in spite of the arc length variations the energy absorption remains constant.


TIG DC Standard Welding


When the arc length changes, the melting pool (D) becomes wider with consequent increase of the heat output on the base material which is subjected to overheating.


Dynamic Arc TIG DC Welding


When the arc length changes, the melting pool maintains exactly the same width (D) avoiding the base material’ s overheating, any plastic deformation and any loss of its mechanical features.


Dynamic Arc Benefits


The Dynamic Arc function permits the welding with extremely short arcs. When the electrode is very close to the base material, the current increase avoids the contact by the shifting of the welding pool.

This prevents both the electrode’s sticking at the material and the inclusion of tungsten’ s particles on the deposit.

- Faster welding.

- Reduced plastic deformation of the welded part.

- Increased vertex penetration.

- Heat concentrated only at the point of the weld and not in the surrounding area.

- Less oxidation of the part and hence reduced cost of post welding operations.

- Improved control of the first root pass (helpful for plumbers and plant engineers).

- Less risk of electrode sticking when it touches the weld puddle.

- Easy welding also on irregular preparated pices.

- Reduced margin of error and increased arc stability in spite of torch moving variation.

- Through the combination between Puls and High frequency it is possible the obtaining of a very focused arc with higher power density.


Dynamic Arc Applications

TIG DC continuous fillet weld without additional material:



TIG DC continuous fillet weld without additional material by Dynamic Arc:



Suggested Parameters


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