WELD THE WORLD
Cod. 006.0001.2000
19/07/2018 V.2.0
Discovery 221AC/DC Evo
Discovery 300AC/DC Evo
41
ENGLISH
EXTRA FUSION
EXTRA
FUSION
0%
40%
80%
0
0%
80%
40%
80%
20%
CURRENT
ARC
0
50%
50%
EXTRA
FUSION
0%
40%
80%
0
0%
80%
40%
80%
20%
CURRENT
0
40%
60%
ARC
EXTRA
FUSION
0%
40%
80%
0
0%
80%
40%
80%
20%
CURRENT
0
20%
80%
ARC
- AC INVERSION FREQUENCY
○ The frequency in TIG AC is the number of inversions by DC + to DC- as a unit of time (T1) and
adjusted in Hertz (Hz). The reduction in the frequency value of the electric arc inversion tends to
widen its size, therefore it is advisable to use low frequencies for the welding of relatively large
thicknesses or for filling passes in multipass bevels. Conversely, in increasing the inversion fre
-
quency value, the arc size tends to decrease and therefore increases the concentration of the
pool and the precision of the welding. It is therefore advisable to use high values of frequency for
the welding of very thin thickness or for facings on edges of moulds
-
Consequences of a higher value:
• Arc concentration.
•
Reduction of heat-affected zone.
•
Slower melt speed.
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