Further Explanations - Fronius TransPocket 4000 CEL Bedienungsanleitung

"P" parameter (constant welding power)
If the "P" parameter is set, the welding power is kept constant, irrespective of the welding
voltage and welding current. This results in a hyperbolic characteristic (6).
The "P" parameter is particularly suitable for cellulose electrodes. The "P" parameter is
therefore also the factory setting when the "MMA welding with Cel electrode" process is
selected.
If there are problems with a rod electrode tending to "stick", set the arc-force dynamic to a
higher value.
60
50
40
30
20
10
Characteristics that can be selected using the Eln
function
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)

Further explanations

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
the characteristics (4), (5) and (6) according to the welding voltage at a given moment. 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).
Applies to characteristics (5) and (6): Depending upon the welding voltage (arc length), the
welding current (I) will also become either smaller or larger, even though the value set for
I
H
86
(V)
(4)
con - 20
(6)
A / V
(5)
(7)
0
0
50 100 150 200 250 300 350 400 450 (A)
Load line for rod electrode
Load line for rod electrode where arc length is increased
Load line for rod electrode where arc length is reduced
Characteristic where "con" parameter is selected (constant welding current)
Characteristic where "0.1 - 20" parameter is selected (drooping characteristic with
adjustable slope)
Characteristic where "P" parameter is selected (constant welding power)
Example of pre-set arc-force dynamic where characteristic (4) is selected
Example of pre-set arc force dynamic where characteristic (5) or (6) is selected
remains the same.
(2)
(1)
(3)
(8)
) is permanently set, the operating point may migrate along
H