Fronius MagicWave 190 Operating Instructions Manual page 86

Pulse waveform
to optimize arc pressure
Hard rectangle / Soft rectangle / Sine
Factory setting: Hard rectangle
Hard rectangle:
Pure rectangular waveform;
slightly louder arc noise. Rapid current changes
Used for orbital welding, for example
Soft rectangle:
Rectangular waveform with decreased edge steepness, for noise reduction compared to
the pure rectangular waveform;
universal applications
Sine:
Sinusoidal waveform (default setting for low noise and stable arc);
used for corner seams and cladding applications, for example
Optimising the arc pressure has the following effects:
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Base current waveform
To optimise the arc pressure
Hard rectangle / Soft rectangle / Sine
Factory setting: Hard rectangle
Hard rectangle:
Pure rectangular waveform;
slightly louder arc noise. Rapid current changes
Used for orbital welding, for example
Soft rectangle:
Rectangular waveform with decreased edge steepness, for noise reduction compared to
the pure rectangular waveform;
universal applications
Sine:
Sinusoidal waveform (default setting for low noise and stable arc);
used for corner seams and cladding applications, for example
Starting current time
The starting current time specifies the duration of the starting-current phase.
off / 0.01 - 30.0 s
Factory setting: off
IMPORTANT! The starting current time only applies to 2-step mode and spot welding. In
4-step mode, the duration of the starting-current phase is controlled using the torch trigger.
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Better wetting of the weld pool (improved welding of butt welds or corner welds)
Slow current rise or current drop (especially with fillet welds, high-alloy steels or clad-
ding applications, the filler material or the weld pool is not pushed away)
Quieter welding thanks to smoother waveforms