Installation - Cebora Sound MIG 2740/T Star Pulse Betriebsanleitung

This adjustment is important in order to always achieve
good starts.
Manufacturer setting «Au»: automatic.
The value can be changed using the knob AN. If, once
changed, you wish to return to the original settings,
press the key AV until the abbreviation «Au» reappears on
the display AM.
9- BB (Burn-back).
The adjustment may range from 4 to 250ms. Serves to
adjust the length of the wire leaving the contact tip after
welding. The higher the number, the more the wire burns.
Manufacturer setting «Au» automatic.
If, once changed, you wish to return to the original set-
tings, press the key AV until the abbreviation «Au» reap-
pears on the display N.
10- L (impedance).
The adjustment may range from -9.9 to +9,9. Zero is the
number set by the manufacturer:if the number is negative,
the impedance decreases and the arc becomes harder; if
increased, it becomes softer.
11- dP ( Double pulse, optional )
This type of welding varies the current intensity between
two levels and may be included in all synergic processes.
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.
To activate the function proceed as follows:
A)- Activate the function by turning knob AN until the
abbreviation On reappears on the display AM.
B)- Turn knob AI fino uni tl the abbreviation FdP reap-
pears (double pulse frequency) on the display AL. The
display AM reads the abbreviation OFF.
Turn the knobAN to select the working frequency (adjust-
ment from 0.5 to 5 Hz). The selected value is shown on
the display AM.
C) Turn knobAI until the abbreviation ddP (difference in
m/min of the double pulse) is displayed.
Turn the knob AN to select the meters per minute (range
from 0.1 to 3m/min) that will be added to and subtracted
from the reference speed (default 1m/min).
D)Turn the knob AI until the display shows the the
abbreviation tfP. This is the duration of the highest wire
speed, thus the highest current. It is expressed as a per-
centage of the time gained from the Fdp frequency (see
figure 3).
DdP= 0,1÷3 m/min
tdP = 25÷75% di
T = 1/ Fdp (0,5÷5 Hz)
R e f e r e n c e
speed
T
Fig. 3
Turn knob AN to adjust the percentage. Range between
25 and 75% (default 50%).
E)-Turn knobAI unitl
abbreviationAdP (arc length of the highest current).
Range between -9.9 and 9.9% (default 0).
When welding, check that the arc length is the same for
both currents; turn the AN knob to correct it if necessary.
Note: it is possible to weld within the double pulse func-
tions.
Once these adjustments have been made, to return to the
control panel normal display briefly press key AE.
Should it be necessary to adjust the arc length of the low-
est current/lowest speed, adjust the arc length of the ref-
erence speed. When the reference speed moves, the pre-
vious settings must also be repeated for the new speed.
12- PP (push-pull).
By using Push-Pull torch Art. 2009 function PPF (Push
Pull Force) is enabled which adjusts the drive torque of
the push-pull motor in order to make the wire feed linear.
The adjustment may range from 99 to -99 and is done
through knob AN.. Standard adjustment is 0.
13- Ito. (Inching time out.
The purpose is to stop the welding machine if the wire
flows after starting with no passage of current.
The wire flow from the welding torch can be adjusted
from 5 to 50 centimeters by means of knob AN. When this
function is restored, it may be activated (On) or cut off
(Off).
14- Fac. (factory).
The purpose is to return the welding machine to the orig-
inal settings provided by the manufacturer. With the func-
tion selected, the display AM shows noP = restores the
welding machine to the original settings disregarding the
stored programs, Prg = deletes all stored programs and
ALL = restores the welding machine to the original set-
tings.
To save the desired function press the button AV, the
abbreviation shown on the display AM will begin flashing;
after a few seconds, a sound will confirm that it has been
saved.

6 INSTALLATION

The welding machine must be installed by skilled per-
sonnel. All connections must be made in full compliance
with current safety laws.
6.1 PLACEMENT
The weight of the welding machine is approximately
67Kg therefore for lifting it see Fig.4.
Position the unit in an area that ensures good stability,
and efficient ventilation so as to prevent metal dust
(grinding) from entering.
6.2 ASSEMBLY
Mount the rear wheels.
Mount the plug on the power cord, being especially care-
ful to connect the yellow/green conductor to the earth
the display shows the
15