Weco Discovery 300 AC/DC, Инструкция по эксплуатации

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Discovery 300 AC/DC
Cod.006.0001.1840
13/07/2016 v2.2
ENGLISH
0
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The following picture shows the positive wave interval ∆I that, if
subtracted and added to the negative wave, forms the new form of
broken line wave.
Consequences of a higher value:
−
Tighter arc.
−
Greater weld penetration.
−
Reduced pickling.
−
Loss of arc.
−
Less deformation of the electrode.
AC frequency
The picture below shows the example where the wave on the second
graph has a double frequency compared with the first.
Consequences of a higher value:
−
Arc concentration.
−
Reduction of heat-affected zone.
−
Reduction of heat-affected zone.
−
Slower melt speed.
AC balance
This parameter establishes the positive wave vs. negative wave time
ratio.
The following figure shows two graphs with different balance value:
the first graph represents the curve of the current with a negative
value balance (more penetration) in which it can be seen that there is
a low percentage of positive wave compared with the negative.
In the second graph the current curve is shown with a positive value
balance (more cleaning); in this case the percentage of the positive
wave is greater than the negative one.
Consequences of a higher value:
−
Greater weld penetration.
−
Less cleanliness.
Electrode diameter
The parameter optimizes the AC TIG welding arc strike on the basis
of the diameter of the chosen electrode.