General Notes; Aluminium Welding - ELLETRO PRO MIG Manual De Instrucciones

• Connect the pipe coming out of the rear side with
the cylinder flowmeter.
•
Before connecting the mains cable (22) make sure
that voltage corresponds to that of the welding machine
and the ground clamp is working.
•
In the models with two different supply voltages
indicated on the specifications plate, it is possible to
invert them, by operating on the terminal board (14).
•
(Fig. 1) In order to accede to the voltage changer, it
is necessary to remove the band (18). Warning : before
changing voltage or anyway before opening the
machine, make sure that mains cable is not connected
to the socket.
• Provide the supply system with fuses fitted for
absorption as indicated in the specifications plate.
2.3.2 Starting welding
• Connect the ground clamp (pos. 33) to the
workpiece.
• Turn the machine on by the switch (pos. 47).
•
Remove the taper gas nozzle (41) by rotating it
clockwise.
•
Unscrew the contact tip (43).
•
Press the torch push button (45) and release it only
when the wire comes out.
Welding wire can cause puncture wounds.
•
Do not press gun trigger until instructed to do so.
•
Do not point gun toward any part of the body, other
people, or any metal when threading welding wire.
•
Tighten the contact tip (43) and make sure that the
hole diameter corresponds to the wire being used.
• Reinstall the taper gas welding nozzle (47), rotating
it clockwise.
2.4 UNIT DESCRIPTION (pict. 6 and 7)
21) 220V socket. Apt for use of pre-heater or a
cooling unit with maximum power of 250 VA.
Located on the machine rear side.
32) Inductance sockets adjustable with ground
terminal for the different welding types.
39) Fitting for welding torch.
47) Switch on - off.
48A) Potentiometer for continuos adjustment of
wire speed.
48B) Potentiometer for controlling wire starting.
This potentiometer makes it possible to adjust wire
acceleration on starting in order to facilitate arc
ignition.
53) Measuring device made of: an amperometer
indicating welding
indicating secondary voltage
65) Commutator for gross adjustment of welding
voltage.
66) Commutator for accurate adjustment of welding
voltage.
70) Commutator for selecting automatic/manual
control. In AUT. position, after pressing and
releasing the torch push-button, the machine is
still on. In order to switch it off, it is required to
repeat this operation. In MAN. position, the
machine works by keeping the torch push-button
pressed and stops on releasing it.
72) 5A/500V Ø6,3x32 slow blow fuse in line with
switch.
74) 24V lead.
75) 220V lead.
77) 0,5A/250V Ø 5x20 slow blow fuse in line with the
digital instrument.
78) 12A/250V Ø 5x20 slow blow fuse in line with the
low tension circuit.
79) 2A/250V Ø 5x20 slow blow fuse in line with the
socket pos. 21.
power and a voltmeter
80) 1A/250V Ø 5x20 slow blow fuse in line with the fan
motor.
2.5 REPLACEMENT OF WIRE REEL
•
Turn the welder off : switch (pos.47) in OFF position.
•
Remove the mobile cover of the wire feed unit (12).
•
Cut the wire end coming out from the current nozzle
with a well sharpened toll. Release the wire pressing
unit (D, fig. 4).
•
Wind the wire by rotating the reel.
• Look the wire end in the side hole of the spool.
•
Loosen the ring nut of the support (3), remove the
reel and replace it.
For the assembly of the reel follow the instruction of the
paragraph "START UP".
NOTE: The reel carrier can be fitted both with the 8
inches (10 LB) dia. reels and the 11 13/16 inches (30
LB) dia. reel.

2.6 GENERAL NOTES

Before using this welding machine, carefully read the
CEI Standards 26/9 or CENELEC HD 407 AND CEI
26/11 or CENELEC HD 433, also check for insulation of
cables, torch and earth cable.
3 WELDING GUIDELINES
3.1 CONTINUOUS MILD-STEEL WELDING
3.1.1 With gas protection
75% ARGON + 25% CO2 or 100% CO2 can be used for
mild steel welding.
•
Adjust the welding voltage by switches (pos.65 and
66).
•
Approach the point to be welded and press the torch
push button (45).
•
Adjust the potentiometer (fig.7 pos. 48A) until the
welding noise is constant and continuous. If the speed is
too high, the wire tends to get stuck on the workpiece
which makes the torch bounce back. If speed is too low,
the wire melts irregularly or else the arc switches off.
NOTE : To obtain well joined and well shielded welding
always weld from left to right and from up to down. At
the end of each welding remove the slag.

3.2 ALUMINIUM WELDING

The machine will be set up as for mild steel except for
the following changes :
1. 100% ARGON as welding protection gas.
2. Wire of composition suitable for the material to be
welded.
•
For ALUMAN welding wire 3-5% silicon.
•
For ANTICORODAL welding wire 3-5% silicon.
•
For PERALUMAN welding wire 5% magnesium.
• For ERGAL welding wire 5% magnesium.
NOTE: If you only have a torch for steel wires, the same
shall be modified in the following way :
• Make sure that length of torch cable does not
exceed 118 inches (it is advisable not to use longer
torches).
• Remove the brass liner-holding nut, the gas and the
current nozzles, then slip the sheath off.
• Insert the Teflon liner for aluminium and ensure it
protrudes from both ends.
•
Screw the current nozzle so that the liner adheres to
it.
•
Insert the liner-holding nipple, the O-Ring in the free
end of the liner and secure with the nut without
tightening too much.
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