Usage Norms - CEA Rainbow 180 Manuel D'instructions

1
6
5
4
3
2
FIG. A
FIG. B
WELDING THICKNESS (mm)
1,5 ÷ 3
3 ÷ 5
5 ÷ 12
≥ 12
Ø ELECTRODE (mm)
1,6
2
2,5
3,25
4

Usage norms

CONTROL APPARATUS (Fig. A)
Pos. 1 Supply switch. In the "O" position the welder is off.
Pos. 2 Rapid connection attachments of the electrode hold-
er and earth holder gripper.
Pos. 3 Yellow THERMOSTAT LED. When this LED switch-
es on it indicates that the trip switch has tripped be-
cause you are working beyond the work cycle. Wait
for a few minutes before starting to weld again.
Pos. 4 Welding current adjust potentiometer.
Pos. 5 Green POWER SUPPLY LED. When this LED is on, it
means that the power supply to the welding machine
is on, and it is ready to work.
Pos. 6 Selector 3 weld procedures:
• ELECTRODE - For basic electrode welding with
"Arc Force" and "Hot Start" device.
• Cr-Ni ELECTRODE - For stainless steel welding
with special soft-arc characteristics.
• TIG - For TIG welding with thermal controlled (TCS)
"Lift" type striking reducing tungsten inclusions to
a minimum and allowing to also strike on sharp
edges.
MMA electrode welding (Fig. B)
Electrode welding is used to weld most metals (different types
of steel, etc.) using coated rutilic and basic electrodes with di-
ameters ranging from Ø 1.6 mm to Ø 4 mm.
1) Connecting the welding cables:
Disconnect the machine from the mains power supply and
connect the welding cables to the output terminals (Positive
and Negative) of the welding machine, attaching them to
the clamp and earth with the polarity specified for the type
of electrode being used (Fig. B). Always follow the elec-
trode manufacturer's instructions. The welding cables must
be as short as possible, they must be near to one another,
positioned at or near floor level.
2) Adjust the welding current using the potentiometer (Pos. 4,
Fig. A).
3) Turn the process selector (Pos. 6, Fig. A) to the ELEC-
TRODE position (for welding using basic electrodes with an
"Arc Force" and "Hot Start" device) or Cr-Ni ELECTRODE
(for welding stainless steel with special characteristics to
achieve a softer arc).
4) Start the welding machine by selecting position 1 on the
line switch (Pos. 1, Fig. A).
5) The green LED (Pos. 5, Fig. A) shows that the power sup-
ply to the welding machine is on, and it is ready to worke.
6) Carry out welding by moving the torch to the workpiece.
Strike the arc (press the electrode quickly against the met-
al and then lift it) to melt the electrode, the coating of which
forms a protective residue. Then continue welding by mov-
ing the electrode from left to right, inclining it by about 60°
compared with the metal in relation to the direction of weld-
ing.
10
Table 3
Ø ELECTRODE (mm)
2
2,5
3,25
4
Table 4
CURRENT (A)
30 ÷ 60
40 ÷ 75
60 ÷ 110
95 ÷ 140
140 ÷ 190