CHIEF MultiMig 721 Multivoltage, Инструкция по эксплуатации

Страница: 9 / 52

9
• Burnback correction .
The adjustment can vary from -9.9 to +9.9. Its purpose
is to adjust the length of the wire coming out of the gas
nozzle after welding. A positive figure corresponds to
greater wire burning.
The factory adjustment is 0 (Default function).
Turn the knob
2 to select the parameter and confirm
the selection by pressing the knob.
The value is adjusted by turning the knob 2 . To confirm
the selection just press the knob 2 or the key .
Press the key DEF to reset the factory set parameters.
• Double Level .
Active in synergic MIG/MAG processes. This type of
welding varies the current intensity between two lev-
els. Before setting the double level welding, it is neces-
sary to make a short bead to determine the wire speed
and the current to obtain the penetration and the bead
width closest to the type of welding to be made.
In this way the wire feed speed value (and the corre-
sponding current) is determined; the meters per min-
ute that will be set will be alternatively added to and
subtracted from this value.
Before start working you should not forget that for a
correct bead, the minimum overlapping between two
“meshes” must be 50%.
MIN MAX DEF
Frequency 0.1 Hz 5.0 Hz 1.5 Hz
Speed
difference
0.1 m/min 3.0 m/min 1.0 m/min
Duty cycle 25% 75% 50%
Arc correction -9,9 9,9 0,0
Double level frequency.
The Herz frequency is the number of periods per sec-
ond.
Period means the speed alternating from the higher to
the lower values.
The lower value, that does not penetrate, is used by the
operator to change from one mesh to the next one; the
higher speed, corresponding to the maximum current,
is the penetrating speed and the mesh execution. The
operator will stop to make the mesh.
The speed difference. Is the amplitude of the speed
change in m/min.
The speed change determines the sum and the sub-
traction of m/min from the reference speed described
above. Parameters being the same, when the number
increases the mesh is wider and penetration is deeper.
Duty cycle . The double level time expressed as a per-
centage, is the higher speed/current time as compared
to period duration. Parameters being the same, it de-
termines the mesh diameter and therefore the penetra-
tion.
Arc correction. Sets arc length of the higher speed/
current.
Important : make sure that the arc length is the same
for both currents.
Turn the knob 2 to select the parameter and confirm
the selection by pressing the knob.
The value is adjusted by turning the knob 2 . To confirm
the selection simply hold down the knob 2 or the key
.
Press the key DEF to reset the factory set parameters.
• Preflow .
The adjustment may range from 0 to 10 seconds
Turn the knob
2 to select the parameter and confirm
the selection by pressing the knob.
The value is adjusted by turning the knob 2 . To confirm
the selection just press the knob 2 or the key .
Press the key DEF to reset the factory set parameters.