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Gas connection
The units are supplied with a pressure reducer
complete with pressure gauge for adjustment of
the pressure of the gas used in welding (optional).
The gas cylinders (Max height 1200 mm) must be
placed on the rear cylinder-support platform of
the welding machine and secured with the chain
supplied. They must be installed in a way that does
not interfere with the stability of the welding ma-
chine. The connections between the gas tank,
reducer and gas pipe, from the back panel of the
welder, to be made as shown in fig. C.
Open the gas cyclinder and regulate the flowm-
eter to about 8/12 l/min.
WARNING: Check that the gas used is compat-
ible with the material to be welded.
Instructions for use
COMMAND AND CONTROL UNITS (fig. D)
Pos. 1
Euro type torch connection.
Pos. 2
Potentiometer with switch for regulating the spot welding time.
Pos. 3
On/Off switch.
Pos. 4
Thermostatic protection warning light. When on, it indicates
that thermal protection is operating. You are working beyond
the work cycle (see "Limits of use"). Wait a few minutes before
continuing the welding.
Pos. 5
Switch for regulating the welding voltage.
Pos. 6
Potentiometer for adjustment of wire speed.
1
FIG. D
Loading wire
• Lift the latch on the left side panel and insert a spool, (Use spools of
300 mm MAX and 20 kg MAX) that is compatibile with the material to
be welded. Place the spool on the appropriate support so that the wire
winds clockwise and insert the protruding pin on the support into the
hole in the spool.
• Thread the end of the wire into the back guide (Pos. 7, Fig. E) on the
drawing mechanism.
• Lift up the idle roller (Pos. 1, Fig. E) releasing the roller pressure mecha-
nism (Pos. 6, Fig. E). Check that the drive roller (Pos. 4, Fig. E) has the
diameter corresponding to the wire being used printed on the outer
side.
• Thread the wire into the central wire guide and into the wire guide of
the centralized attachment (Pos. 3, Fig. E) for a few centimetres. Lower
the idle roll-holder arm making sure the wire goes into the slot of the
drive roll. If necessary, adjust the pressure between the rollers with the
screw provided (Pos. 5, Fig. E). The correct pressure is the minimum
FIG. C
2
3
6
5
4
1
7
FIG. E
that does not allow the rollers to skid on the wire. Excessive pressure
will case deformation of the wire and tangling on the entrance of the
sheath; insufficient pressure can cause irregular welding.
Assembly of drive roller
Follow instructions given below for mounting the drawing roller onto the
mechanism:
• Unscrew the screw (Pos. 5, Fig. E).
• Lift up the idle roll-holder arm (Pos. 2, Fig. E).
• Each roller shows the type of wire and diameter on the two external
sides.
• Mount the appropriate roller (Pos. 4, Fig. E) making sure the groove is
in the right position for the diameter of the wire being used.
• Screw the screw (Pos. 5, Fig. E).
Welding
IMPORTANT: Before welding, check that the data on the power source
plate correspond to the supply voltage and frequency.
• Switch on the welder pressing the switch (Pos. 3, Fig. D) on position 1.
• Turn the weld voltage change-over switch (Pos. 5, Fig. D) to the posi-
tion most suited for the work to be done.
• Remove the gas-guide and wire-guide nozzles, allowing the wire to
flow freely during loading. Remember that the contact tip must corre-
spond to the wire diameter.
• Set the wire speed potentiometer on position 3 (Pos. 6, Fig. D).
• 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.
• Attach the correct gas-guide nozzle.
• Protect the gas-guide nozzle and the wire-guide nozzle of the torch
from sprays of solder.
FIG. F
9
2
3
4
5
6
2000H924
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