Adjustment From Generator Or Wire-Feeder; Viewing Installed Software Versions; Before Welding; Welding Procedures - CEA DIGITECH 400 PULSED-TA4 Manual De Instrucciones

Adjustment from generator or wire-
feeder
The DIGITECH 400 PULSED has a system for adjusting param-
eters by moving the encoder knobs on the front panel of the ma-
chine (generator adjustment) or the potentiometer knobs on the
front panel of the wire-feeder (wire-feeder adjustment).
The wire-feeder adjustment is the standard adjustment used for
machines coming out of the factory.
Press the combination of keys given below to change to GEN-
ERATOR ADJUSTMENT (encoders ACTIVATED - potentiometers
NON-ACTIVATED):
• Press and release the SPECIAL FUNCTIONS key;
• Press and release the (-) negative PROGRAMME SCROLLING
key;
• Press and release the SPECIAL FUNCTIONS key.
Press the combination of keys given below to return to the WIRE-
FEEDER ADJUSTMENT (encoders NON-ACTIVATED -
potentiometers ACTIVATED):
• Press and release the SPECIAL FUNCTIONS key;
• Press and release the (+) positive PROGRAMME SCROLLING
key;
• Press and release the SPECIAL FUNCTIONS key.

Viewing installed software versions

The DIGITECH 400 PULSED has a digital control with software on
board produced in the factory. This software is subject to continu-
ous innovation and improvement. A number/specific version dis-
played on the PROGRAMME DISPLAY identifies the software of
each circuit board in the following way:
• FRONT PANEL CPU DIGITAL CIRCUIT BOARD
Start up the welder by turning the switch on the back panel to 1,
press the SPECIAL FUNCTIONS key then the RUN/MEM key.
• FRONT PANEL DIGITAL CIRCUIT BOARD
Start up the welder by turning the switch on the back panel to 1,
press the SPECIAL FUNCTIONS key then the GAS TESTING
key.
• TA4 PANEL CIRCUIT BOARD
Start up the welder by turning the switch on the back panel to 1,
press the SPECIAL FUNCTIONS key then the WIRE TESTING
key.

Before welding

WARNING: Before welding, check that the data on the power
source plate correspond to the supply voltage and frequency.
• Make sure the wire-feeder is properly connected to the welder
by the interconnection cable;
• Start up the welder by turning the switch on the back panel to 1
(N.B.: the machine will display the last settings made before it
was switched off when it is turned on again);
Ø ELECTRODE
6010
(mm)
6011
1,6 -
2 -
2,4 40-80
3,2 75-125
4 110-170
4,8 140-215
5,6 170-250
6,4 210-320
8 275-425
ELECTRODE TYPE - Current adjustment field (A)
6012 6013 6020
20-40 20-40 -
25-60 25-60 -
35-85 45-90 -
80-140 80-130 100-150
110-190 105-180 130-190
140-240 150-230 175-250
200-320 310-300 225-310
250-400 250-350 275-375
300-500 320-430 340-450
• Set the various units according to the chosen welding process.

Welding procedures

ELECTRODE WELDING
For coated electrode welding with devices that can be adjusted
from the user's "arc force" (adjustable with the V- PARAMETERS
SELECTION key) and "hot start" (adjustable with the SPECIAL
FUNCTIONS key).
You can access this welding mode by pressing the WELD PROC-
ESS key and then turning to MMA
Connect up the welding cables following description in paragraph
"Connecting up welding - ELECTRODE welding cables (fig. B)".
WARNING: Do not lay down the torch on live parts connected to
the earthing cable while the wire-feeder is connected up to the
welding unit by the interconnection cable.
Welding parameters
Table 4 shows the values of current to use with the respective
electrodes for the welding of common steels and low-grade alloys.
These data have no absolute value and are indicative data only.
For a precise choice follow the instructions provided by the elec-
trode manufacturer. The current to be used depends on the weld-
ing positions and the type of joint, and it increases according to the
thickness and dimensions of the part. The current intensity to be
used for the different types of welding, within the field of regulation
shown in table 4 is:
• High for plane, frontal plane and vertical upwards welding;
• Medium for overhead welding;
• Low for vertical downwards welding and for joining small pre-
heated pieces.
A fairly approximate indication of the average current to use in the
welding of electrodes for ordinary steel is given by the following
formula:
where: I = intensity of the welding current
Øe = electrode diameter
Example: for electrode diameter 4 mm
I = 50 x (4 –1 ) = 50 x 3 = 1 50A
The pre-set values of the welding current
ENCODER 1 knob) and open-circuit voltage (not adjustable) or of
the "arc force" (adjustable with the ENCODER 2 knob - if selected)
will be displayed on the A- PARAMETERS Display (abbreviated in
dVPA) and V - PARAMETERS Display (abbreviated in dVPV) be-
fore welding starts.
The values of the welding current
justable with the ENCODER 1 knob) and the welding voltage
or the "arc force" (adjustable with the ENCODER 2 knob - if se-
lected (on a scale of values varying between 0 and 100 (absolute
value) with an adjustment interval at 1 - a parameter that increases
7015
6027 7014
7016
- - -
- - -
- 80-125 65-110
125-185 110-160 100-150
160-240 150-210 140-200
210-300 200-275 180-255
250-350 260-340 240-320
300-420 330-415 300-390
375-475 390-500 375-475
34
.
I = 50 x (Øe – 1 )
(adjustable with
being used for welding (ad-
7024 THICKNESS
7018
7028
- -
- -
70-100 100-145
115-165 140-190
150-220 180-250
200-275 230-305
260-340 275-365
315-400 335-430
375-470 400-525
Table 4
WELDING
(mm)
≤ ≤ ≤ ≤ ≤ 5
≤ ≤ ≤ ≤ ≤ 6,5
> 3,5
> 6,5
> 9,5
> 13