Resetting; Limits To Changing Parameters; Energy Saving" Function; Aluminum Welding - CEA DIGITECH 400 PULSED-TA4 Manual De Instrucciones

tons on the panel are disabled while the right (+) and left (-) but-
tons on the torch remain active. If the torch is not of the up/
down type, it is not possible to change the automatic point
during the welding.
When the welding is active, pressing the right (+) and left (-) but-
tons on the torch let you pass from one automatic welding point to
the previous or next one withing the same sequence, respecting
the limits mentioned in "Limits in using the sequences".
If pressing the right (+) or left (-) button brings you to the end of a
sequence, the sequence resumes from the opposite end.
The passage from one automatic point to another is made while
linking to the line current memorized by means of a current ramp.
The slope is memorized as part of the special functions of the au-
tomatic welding point for which it is intended and is therefore the
active ACS parameter when the automatic welding point was memo-
rized.
LIMITS TO THE USE OF SEQUENCES
The use of sequences with the possibility of passing from one au-
tomatic welding point to another while the welding is active is only
allowed:
• When the change of automatic welding point does not involve a
change in the welding process;
• When the process selected must be MIG/MAG or PULSED MIG
(therefore it is not possible to change the automatic welding point
during welding in DOUBLE PULSED MIG);
• When changing the automatic welding point does not involve a
change in the synergic curve used (therefore it is not possible to
pass, for example, from a memorized point beginning with curve
P4 to a memorized point beginning with curve P5);
• It is not possible to pass from one automatic welding point to
another if the WELDING MODES (2T, 4T, CRATER, POINTING
are not the same for both automatic points and if these are dif-
ferent from 2T or 4T.

Resetting

Resetting to factory values must be divided in two parts. First of all
press and release the SPECIAL FUNCTIONS key to enter the
special functions. Then:
• Pressing the RUN/MEM button for 3 seconds shows the letters
STD flashing on the display: at the end of the flashing, by letting
go of the button the factory settings are restored for the previ-
ously active welding programme only, except for the automatic
points (which therefore remain memorised);
• Pressing the WORK TYPE button for 5 seconds shows the let-
ters RST flashing on the display: at the end of the flashing, by
letting go of the button the factory settings are restored and the
automatic welding spots are cancelled.
The wording STD and RST on the display means that the opera-
tion has been accepted. This is done when one of the keys are
released and is followed by the machine automatically starting up
again, so that the default settings are loaded and activated straight
away.
NOTE: The special parameters of all the welding programmes
are returned to their factory settings and the automatic welding
spots are cancelled.

Limits to changing parameters

The SPECIAL FUNCTIONS key must be pressed for 5 seconds to
set the machine to shutdown. At this point the machine presents
an interface similar to the one for setting the special functions pa-
rameters and specifically: required functions can be selected by
pressing the ENCODER 1 knob, while the parameters of the latter
can be set with the ENCODER 2 knob.
Parameters selectable with ENCODER 1 knob and viewed on rel-
evant dVPA display are:
• PASSWORD (viewed on the PAS display)
• SHUTDOWN LEVEL (displayed on the BLL display)
Values selectable with ENCODER 2 knob and viewed on relevant
dVPV display are:
• The password has three digit numbers with values ranging from
000 to 999.
• 0 = NO SHUTDOWN or MACHINE RELEASE
The machine is not blocked, this also makes it possible to free it
if had been previously blocked (after entering the correct pass-
word).
• 1 = SHUTDOWN LEVEL 1 activated
In SYNERGIC and MANUAL mode it is possible to modify the
WELDING VOLTAGE END REGULATION value, the
WELDING CURRENT value and the ELECTRONIC INDUCTOR
value using the ENCODER 1 and ENCODER 2 dials, or the
potentiometers present on the from panel of the TA4 conveyor
or the eventual remote control.
• 2 = SHUTDOWN LEVEL 2 activated
None of the welding parameters may be changed.
• 3 = SHUTDOWN LEVEL 3 activated
In SYNERGIC and MANUAL mode it is not possible to modify
any welding parameter. In AUTOMATIC mode it is only possible
to modify the WIRE SPEED by a value equal to ±15% of the
registered value, using the ENCODER 1 dial only. With even-
tual remote controls, you can only scroll the automatic points
registered.
After setting the shutdown levels and the password (relevant value
and code must be entered the first time by the user) just press the
SPECIAL FUNCTIONS key once more to exit from the menu and
have the machine ready again for welding. The selections remain
memorized until they are changed again.

"ENERGY SAVING" function

This function makes sure the cooling fan and coolant system are
working properly, these are only activated when strictly necessary
i.e.:
• FAN MOTOR
The fan is activated:
- During the welding phase or for a reasonable period of time
when welding has terminated;
- When the thermostat is active or for a reasonable period of
time when it has just restarted.
• COOLANT SYSTEM
The coolant system is activated:
- When the machine is switched on for one minute so that the
coolant liquid circulates in the system at the correct pressure
(call for technical assistance if the error messages do not dis-
appear from the displays when the coolant system goes off);
- During the welding phase or for a suitable period of time when
the welding has terminated.

Aluminum welding

To weld with aluminum wire proceed as follows:
• Replace the drive rolls with special ones for aluminium wire
(see paragraph: "Assembly of wire-feed rolls for aluminium");
• Use a torch with a hollow of 3 m and sheath in plastic material;
• Set the pressure between the drive rolls at the minimum, by turn-
ing the screw provided;
• Use argon gas at a pressure of 1.3 - 1.7 bar.
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