Cebora Sound Mig 3840/T Pulse Betriebsanleitung Seite 19

the same type saved consecutively and bounded by two
free programs.
This function is carried out with the arc in use.
3.5 SERVICE FUNCTIONS MENU
3.5.1 Managing the cooling unit
Press the button AO and, holding it down, press the
button E to enter in a submenu.
Use the knob N to make your choice: H2O
Turn the knob Q to select the operating mode:
· OFF = off.
· On C = always lit
· On A = automatic start-up. When the machine starts,
the unit is running. If the torch trigger is not pressed, it
shuts off after 15 seconds. When the torch button is
pressed, the unit begins operating, and shuts off 3
minutes after the button itself is released.
Press the keys AO and E again to exit.
If the coolant pressure is too low, the power source deli-
vers no current and the message H2O will appear, fla-
shing, on the display O.
3.5.2 SP Spot-welding and stitch welding.
Active in two-stage (LED S) or four-stage welding (LED T).
Select using the knob N. The display P reads OFF. Turn the
knob Q until the message On appears on the display P to
activate the function.
Turning the knob N, select the item "tSP" (spot welding
time). The display P displays the time of 1 second. Use the
knob Q to set the time, between 0.3 and 5 seconds.
If you want to set stitch welding (welding with automatic
pause time), turn the knob N again so that the display P
reads "tIn" (stitch time). The display P reads OFF. Turn
the knob Q until a number appears, which will be the time
you select between welds.
3.5.3 Automatic Hot Start.(HSA).
Press the button AO and, while holding it down, press the
button E to enter a submenu.
Turn the knob N to select: HSA.
Turn the knob Q to select the type of operation:
OFF = Off
On = Active
Tthe function is active in synergic MIG programs when
two-stage welding (LED S) or four-stage (LED T) is
selected.
The operator may adjust:
1. The level of the "hot-start" current, LED AB.
2. Its duration, LED AD, range from 0.1-10 seconds.
3. The time to switch between the "hot-start" current and
welding current, LED AC.
Starting from version 06 of art. 287 and version 13 of
art. 289, the parameters set with the LEDs AB, AC, and
AD may be selected (knob N) and adjusted (knob Q)
after selecting the HSA function. The following items
are available:
SC = starting current corresponding to the LED AB.
Slo = Slope (interface time) corresponding to the LED AC.
tSC = Starting current time corresponding to the LED AD.
3.5.4 CrA (crater filler- final crater filling).
The function may be selected using the knob N, and oper-
ates in two-stage (LED S) or four-stroke welding (LED T)
and if you wish, also in combination with the HSA function.
After activating the function by selecting "On" with the
knob Q, turn the knob N to display the items:
Slo = Interface time between the welding current and
crater current. Default 0.5 sec. Adjustment range
0.1 –10 sec.
CrC = crater current expressed as a percentage of the
wire speed in welding. Default 60%. Adjustment
range 10 – 200%.
TCr = crater current duration. Default 0.5 sec. Adjustment
range 0.1 –10 sec.
3.5.5 dP Double pulse ( Art. 287 Optional ).
This type of welding varies the current intensity between
two levels and may be included in all synergic programs.
Before setting, it is necessary to make a short bead to
determine the speed closest to the type of welding that
you will be doing. This determines the reference speed.
Proceed as follows to activate the function:
1. Press the button AO and, while holding it down, press
the button E to enter a submenu.
2. Turn the knob N until the abbreviation "dP" appears on
the display O. Activate the function by turning the knob
Q until the message On appears on the display P.
3. Turn the knob N until the message FdP (double pulse
frequency) appears on the display O. Display P shows
the message OFF. Turn the knob Q to select the work-
ing frequency (range from 0.5 to 5 Hz). The value
selected is shown on display P.
4. Turn the knob N until the message ddP (double pulse
difference in m/min) appears.
Turn the knob Q to select the meters per minute (range
0.1- 3m/min) that will be added to and subtracted from
the reference speed (default 1m/min).
5. Turn the knob N until the message tdP appears. This
is the duration of the highest wire speed, thus the
highest current. It is expressed as a percentage of the
time gained from the frequency Fdp (see figure 3).
DdP= 0,1÷3 m/min
tdP = 25÷75% di
T = 1/ Fdp (0,5÷5 Hz)
Turn the knob Q to adjust the percentage. Range
between 25 and 75% (default 50%).
6. Turn the knob N until the message AdP appears (arc
length of the highest current). Range -9.9 - 9.9 (default 0).
Make sure that the arc length in welding is the same for
both currents; turn the knob Q to correct if necessary.
Note: it is possible to weld within the double pulse func-
tions.
R e f e r e n c e
speed
T
Fig. 3
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