CEA DIGISTAR 250 DUAL PULSED Manual De Instrucciones página 31

The pre-set readings of the welding current
the ENCODER 1 knob) and open-circuit voltage
able) will be displayed on the A- PARAMETERS Display (abbrevi-
ated in dVPA) and V - PARAMETERS Display (abbreviated in dVPV)
before starting to weld.
The values of the welding current
justable with the ENCODER 1 knob) and the welding voltage
(not adjustable) appear on the dVPA and dVPV displays during
the welding process.
Ignitions are done rapidly and with precision in this process
through the innovative heat controlled (TCS) "lift" type striking,
reducing tungsten inclusions to a minimum and stopping the
welded piece from being nicked.
The welder has a SWS "Smart Welding Stop" system for the end
of TIG welding. Lifting up the torch without switching off the arc
will introduce a slope down and it will switch off automatically.
Special functions
There are no special functions associated with this process.
Current adjustment field (A)
Ø ELEC-
TRODE (mm) Tungsten
Ce 1%
1
1,6
2,4 80-150
3,2 150-250
4 200-400
MIG-MAG, MIG PULSED AND MIG DUAL PULSED
WELDING
The following jobs must be done before starting to weld:
• Remove the contact tip from the torch so that the end of the
wire can freely come out. Remember that the contact tip must
correspond to the wire diameter;
• Push the torch push button or the motor check push button
until the wire end comes out from the torch;
• Tighten the contact tip on the torch;
• Open the gas cylinder valve slowly and adjust the pressure
regulator to obtain about 1,3 - 1,7 bar;
• Work the gas testing key and adjust the flow to between 14
and 20 l/min. according to the current being used for welding;
• The welding machine is now ready to be used.
SYNERGIC welding mode
Press the WELDING PROCESS key and turn to MIG-MAG
MIG PULSED or MIG DUAL PULSED
WELDING PROCEDURE SELECTION key to SYN to enter this
welding mode.
Synergy is nothing else but a bond that unites the numerous
different sizes in the sense that when one of these sizes are
changed the others automatically change in synergy.
100 programmes, supplied by the manufacturer and valid for any
welding process can be installed in the DIGISTAR 250 PULSED
generator, and are divided up into:
• 100 MIG-MAG programmes (programmes numbering from 1
to 99);
• 100 MIG PULSED programmes (programmes numbering from
101 to 199);
• 100 MIG DUAL-PULSED programmes (programmes number-
ing from 201 to 299).
The generator comes with a certain number of programmes al-
ready produced in the factory, which are shown in the programme
table (see special paragraph) or else on the PROGRAMME DIS-
PLAY (abbreviated dVP) and are ready to be used by the opera-
tor.
(adjustable with
being used for welding (ad-
ELECTRODE TYPE
TIG DC
Tungsten
Rare earth 2%
Grey Turchoise
10-50 10-50
50-80 50-80
80-150
150-250
200-400
then press the
Connect up the welding cables following description given in
(not adjust- paragraph "Connecting the welding - MIG-MAG, MIG PULSED
or MIG DUAL PULSED welding cables (fig. C)".
Use the PROGRAMME SCROLLING keys to select the
programme best suited for the type of work to be done based on
the knowledge of a few parameters (diameter of wire, material
being welded, type of gas to use) or the RUN/MEM key to dis-
play the operating features of the programmes supplied by the
manufacturer. The readings of the preset thickness of piece
welding current
1 knob) are displayed on A - PARAMETERS Display (abbreviated
dVPA) and pre-set weld voltage
inductance
(adjustable with ENCODER 2 knob) are displayed on V -
PARAMETERS Display (abbreviated dVPV) before starting to weld.
The manufacturer has set the values of the last two parameters
to zero. Set as required and start welding. The actual welding
current (adjustable with ENCODER 1 knob) will be displayed on
the dVPA and the actual welding voltage, electronic inductance
and welding voltage trimming (adjustable with ENCODER 2 knob)
will be displayed on the dVPV during welding. The two encoders
Table 4
are activated and operational during welding so that all the sizes
associated with them can be changed. The parameter on the
display does not alter when changing from the setting to the weld-
ing phases and vice versa.
Manual welding mode (activated for MIG-MAG
welding process only)
Press the WELDING PROCESS key and turn to MIG-MAG
then press the WELDING PROCEDURE SELECTION key to MAN
to access this welding mode. The programmes available for MIG-
MAG (see paragraph "Synergic work procedures") and adjustable
parameters (wire speed
basis for this welding procedure through the ENCODER knobs 1
and 2, which are not combined with each other so that you are free
to them as you wish. Connect up the welding cables following the
description given in paragraph "Connecting the welding - MIG-
MAG, MIG PULSED or MIG DUAL PULSED welding cables (fig.
C)". Welding programmes are displayed in the programme table
(see special paragraph) or else on the dVP display. Use the
PROGRAMME SCROLLING keys to select the programme best
suited for the type of work to be done based on the knowledge of
a few parameters (diameter of wire, material being welded, type of
gas to use) and/or the RUN/MEM key to display the operating
features of the programmes supplied by the manufacturer. The
values of the preset wire speed
knob) are displayed on the dVPA and the preset welding voltage
, (adjustable with ENCODER 2 knob) are displayed on the dVPV
before starting to weld. Set as required and start welding.
The actual weld current
can vary from the minimum to the maximum of the corresponding
synergic curve of the programme) will be displayed on the dVPA
and the actual weld voltage
- it can vary from 10 to 40V) will be displayed on the dVPV during
,
welding. The parameter on the displays remains unaltered when
changing from the setting to the welding phases and vice versa.
Welding spot settings may also be created and memorized with
this welding procedure (see special paragraphs) and may be back-
tracked in the AUTOMATIC WELDING PROCEDURE programme.
AUTOMATIC welding mode
Press the WELDING PROCESS key and turn to MIG-MAG
MIG PULSED
WELDING PROCEDURE SELECTION key to AUT to access this
welding mode. Previously memorized automatic jobs can be back-
tracked in the automatic welding mode, you can in fact enter and
backtrack previously set and memorized programmes in the syn-
ergic and manual welding procedures (see special paragraphs).
When the settings of a single preset welding spot have been en-
tered they cannot be changed unless you change to another
welding spot.
31
, wire speed (adjustable with ENCODER
(not adjustable), electronic
and trimming adjustment of the weld voltage
, welding voltage
(adjustable with ENCODER 1
(adjustable with ENCODER 1 knob - it
, (adjustable with ENCODER 2 knob
or MIG DUAL PULSED
,
) are used as a
,
then press the