Fronius TransTig 2200 Instructions De Service page 152

Dynamic (arc In order to obtain optimum welding results, it will sometimes be necessary to set or
force) function adjust the "Dynamic (arc-force)" function. For details on setting the "dYn" parameter,
please see "The Set-up menu: Level 1" - sub-section "Rod-electrode set-up
parameters".
Functional principle
At the instant of droplet transfer, i.e. when a short circuit occurs, there is a momentary
rise in the amperage. In order to obtain a stable arc, the welding current is temporarily
increased. If the rod electrode threatens to sink into the weld pool, this measure
prevents the weld-pool solidifying, as well as preventing more prolonged short-circuiting
of the arc. This largely prevents the rod-electrode from "sticking".
Setting-range of the dYn parameter
0 ........ soft, low-spatter arc
100 .... harder, more stable arc
"Eln"
Important! For details on setting the "Eln" set-up parameter, please see "The set-up
characteristic-
menu: Level 2" - sub-section "Rod-electrode set-up parameters".
selection
function
Fig.25 Characteristics that can be selected using the Eln function
"con" (constant welding current) parameter
-
-
-
Parameter "0.1 - 20" (falling characteristic with adjustable slope)
-
-
Important! When setting a flat characteristic , set the arc-force dynamic to a higher
value.
U (V)
0 25 50 75
If the "con" parameter is set, the welding current will be kept constant, irrespective
of the welding voltage. This results in a vertical characteristic .
The "con" parameter is especially suitable for rutile electrodes and basic electrodes,
as well as for gouging.
For gouging, set the arc-force dynamic to "100".
Parameter "0.1 - 20" is used to set a falling characteristic . The setting range
extends from 0.1 A / V (very steep) to 20 A / V (very flat).
Setting a flat characteristic
... Load line for rod electrode
... Load line for rod electrode where arc
length is increased
con - 20 A / V
... 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 (falling
characteristic with adjustable slope)
... Characteristic where "P" parameter is
selected (constant welding power)
... Example of pre-set arc force dynamic
100 I (A)
where characteristic
... Ex. of preset arc force dynamic where
characteristic
is only advisable for cellulose electrodes.
44
is selected
or is selected