Fronius MagicWave 190 User Manual

93
EN
NOTE!
When setting a flat characteristic (5), set the arc-force dynamic to a higher value.
P-constant (constant welding power)
- If the P-constant characteristic is set, the welding power is kept constant, irrespective
of the welding voltage and welding current. This results in a hyperbolic characteristic
(6).
- This setting is particularly suitable for cellulose electrodes.
NOTE!
If there are problems with a rod electrode tending to "stick", set the arc-force dy-
namic to a higher value.
Settings example: I1 = 250 A, arc-force dynamic = 50
(1) Load line for rod electrode
(2) Load line for rod electrode where
arc length is increased
(3) Load line for rod electrode where
arc length is reduced
(4) Characteristic for parameter setting
I-constant (constant welding cur-
rent)
(5) Characteristic for parameter setting
0.1 - 20.0 (drooping characteristic
with adjustable slope)
(6) Characteristic for parameter setting
P-constant (constant welding pow-
er)
(7) Example of pre-set arc-force dynamic where characteristic (4) is selected
(8) Example of pre-set arc-force dynamic where characteristic (5) or (6) is selected
(a) Operating point where arc length is long
(b) Operating point when welding current I1 is set
(c) Operating point where arc length is short
The characteristics (4), (5) and (6) shown here apply when using a rod electrode whose
characteristic corresponds to the load line (1) at a given arc length.
Depending on what welding current (I) has been set, the point of intersection (operating
point) of characteristics (4), (5) and (6) will be displaced along the load line (1). The oper-
ating point provides information on the actual welding voltage and the actual welding cur-
rent.
Where the welding current (I
1
) is permanently set, the operating point may migrate along
the characteristics (4), (5) and (6) depending on the welding voltage at that moment in time.
The welding voltage U is dependent upon the arc length.
If the arc length changes (e.g. in accordance with the load line (2)) the resulting operating
point will be the point where the corresponding characteristic (4), (5) or (6) intersects with
the load line (2).
10
20
30
40
50
60
U (V)
004003001 200
I (A
)
I
1
+ DynamikI
1
- 50 %
(8)
(2)
(1)
(3)
(7)
(c)
(c)
(b)
(a)
(a)
(6)
(5)
(4)

Fronius MagicWave 190 Specifications

General

Brand	Fronius
Model	MagicWave 190
Category	Welding System
Language	English