CEA DIGITECH vision PULSE 3200 Operator's Manual page 5

FIG. C
relevant screw (Pos. 2, Fig. A). The correct pressure is the
minimum that does not allow the rollers to skid on the wire.
Excessive pressure will case deformation of the wire and tan-
gling on the entrance of the sheath; insufficient pressure can
cause irregular welding.
Assembly of drive rollers
Unscrew the two screws (Pos. 6, Fig. A). Lift up the idle roll-
holder arm (Pos. 3, Fig. A) and proceed as follows:
• Each roller shows the type of wire and diameter on the two
external sides.
• Install the right rolls (Pos. 7, Fig. A) making sure the groove is
in the correct position for the diameter of the wire being used.
Usage norms
CONTROL APPARATUS (Fig. B)
Pos. 1
"DH" control panel.
Pos. 2
Centralized torch connection.
Pos. 3
17-pole connector for accessories / optional.
Pos. 4
Fast coupling positive polarity.
Pos. 5 Fast coupling negative polarity.
Pos. 6 Mains cable.
Pos. 7 Power supply switch. In the "O" position the welder
is off.
Pos. 8 Connector for connecting the cooling system.
Pos. 9 Wire - gas test switch.
MIG-MAG / PULSE MIG / DOUBLE
PULSE MIG Welding
To begin MIG-MAG / PULSE MIG / DOUBLE PULSE MIG weld-
ing, carry out the following tasks (with the machine switched
off).
1 - Connecting the cables (Fig. C)
• Connect the gas hose to the pressure reducer fitted on the
cylinder beforehand.
• Screw the torch onto the centralised connection on the front
panel of the welding machine and connect the feed (blue)
and return (red) water hoses for cooling the torch to the re-
spective rapid couplings (coloured blue and red) on the front
panel of the cooling system.
• Connect up the earthing system cable to the rapid coupling
marked by a - (negative) symbol and then the relevant ground
clamps to the piece being welded or to its support in an area
free from rust, paint and grease. Using particularly long earth-
ing cables reduces the voltage and causes some problems
from increased resistance and inductance of the cables that
could cause faulty welding. Follow instructions to avoid these
problems:
- Use earthing and extension cables with appropriate sec-
tion.
- Lay out the cables as a flat as possible to prevent them
from coiling up.
2 - Welding
1) Switch the welding machine on by moving the power sup-
ply switch to I (Pos. 7, Fig. B).
2) Make the adjustments and do the parameter settings on
the DH control panel (for further information see the DH
control panel manual).
3) Load the wire using the motor test button (Pos. 9, Fig. B),
after having removed the wire guide nozzle from the torch
to allow the wire to come out freely during loading (remem-
ber that the wire guide nozzle must correspond to the di-
ameter of the wire used).
4) Open the tap on the cylinder slowly and adjust the reduc-
er knob to obtain a pressure of about 1,3 to 1,7 bar, and
then activate the gas test button and regulate the flow to
a value between 14 and 20 lit/min to suit the current used
for welding.
5) The welding machine is ready to weld. Start welding by
moving close to the welding point and press the torch but-
ton.
6) Once welding has been completed remove any slag, switch
off the machine (which is only to be done when the fan is
not running), and close the gas cylinder.
Spot welding
The substantial difference with MIG-MAG welding is essential-
ly related to the torch and the adjustments that must be made
on the DH control panel.
• The gas guide nozzle specifically for spot welding must be
fitted on the torch (see Fig. D).
• On the DH control panel, select the spot welding mode and
set the time.
To begin spot welding:
• Press the torch button to start the welding current and wire
feed.
• When the spot welding time expires, the wire feed stops au-
tomatically.
• When the torch button is pushed again a new welding cy-
cle starts.
• Release the torch button.
FIG. D
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