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6 - ANNEXES
6.1. PRESENTATION OF WELDING PROCESSES
For carbon and stainless steels, DIGISTEEL III 320C / DIGIPULS III 320C uses 2 types of short arc:
"soft" or "smooth" short arc
The "dynamic" short arc or « SSA ».
Pulsed MIG may be used on all types of metal (steel, stainless steel and aluminium) with solid wires and some cored wires. It is particularly
suitable for stainless steel and aluminium, for which it is the ideal process, eliminating spatter and achieving excellent wire fusion.
Characteristics of the power source arc
"Soft"or "Smooth" short arc (SA)
The "soft" short arc achieves great reduction in spatter when welding carbon steels, resulting in a very significant reduction in finishing costs.
It improves the appearance of the weld bead thanks to improved wetting of the molten pool.
The "soft" short arc is suitable for welding in all positions. An increase in wire feed speed enables entering spray arc mode without preventing
transition into globular mode.
Note: The "soft" short arc is slightly more energetic than the "speed" short arc. Consequently the "speed" short arc may be preferable to the "soft" short
arc for welding very thin sheets (≤ 1 mm) or for welding penetration passes.
Dynamic" short arc or "Speed Short Arc" (SSA)
"
The Speed Short Arc or SSA allows greater versatility in welding carbon and stainless steels and absorbs fluctuations in the welder's hand
movements, for example when welding in a difficult position. It also helps compensate for differences in the preparation of the workpieces.
By increasing the wire feed speed, the SA mode enters seamlessly into SSA mode, while preventing the globular mode
Thanks to its quick arc control and using appropriate programming, DIGISTEEL III 320C / DIGIPULS III 320C can artificially extend
the Short Arc range to higher currents, in the range of the speed short arc.
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Waveform of short arc welding process
DIGISTEEL III 320C / DIGIPULS III 320C
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