9
electrode ø
direct current
2% thoriated tungsten
negative electrode
( red band )
( Argon )
ø 1mm (0.040")
up to 60 A
ø 1,6mm (1/16")
60
¸
160 A
•
Check to see that power supply voltage corresponds to
voltage indicated on the welding machine technical
specification tag.
•
Connect supply cable (
G
) fig.2: When mounting a plug,
make sure that its capacity is adeguate and that the yellow-
green wire of the mains cable is connected to the earth plug
pin.
•
The capacity of magnetothermic switch or fuses in series
with mains supply should be equal to current I
1
absorbed
by the unit.
•
Input current I
1
is determined by dividing by 1,6 the value
stated on the table.
•
Any extensions should have adequate sections for input
current I
1
.
WARNING: ELECTRIC SHOCK CAN KILL!
•
Do not touch live electric parts.
•
Do not touch weld output terminals when unit is energized.
•
Do not touch torch and earth clamp at the same time.
•
Turn machine on with switch (
F
) fig.2
•
Regulate current based on work to be carried out, then
press torch push-button to allow flow of gas.
•
Start the arc , by contact, with a determined rapid
movement.
•
Once welding is finished, remember to turn machine off
and to close the gas cylinder valve.
3.5.1 Electrode preparation
It is necessary to pay special attention to the preparation
of the electrode point, grinding it so as to obtain vertical
markings as shown in fig. 4.
CAUTION. HOT FLYING METAL PARTICLES can
injure personnel, start fires, and damage equipment:
TUNGSTEN CONTAMINATION can lower weld quality.
•
Shape tungsten electrode only on grinder with proper
guards in a safe location wearing proper face, hand, and
body protection.
•
Shape tungsten electrodes on a fine grit, hard abrasive
wheel used only for tungsten shaping.
•
Grind the end of the tungsten electrode to a taper for a
length of 1,5
¸
2 electrode diameters.
4 MAINTENANCE AND CHECK UP
4.1 GENERAL NOTES
•
Do not touch live electrical parts.
•
Turn off welding power source and remove input power
plug from receptacle before, maintenace, servicing.
MOVING PARTS can cause serious injury.
•
Keep away from moving parts.
HOT SURFACES can cause severe burns
•
Allow cooling the unit before servicing.
4.2 WELDING MACHINE MAINTENANCE
Experience has shown that many fatal accidents originated
from servicing which had not been perfectly executed.
For this reason, a careful and thorough inspection on a
serviced welding machine is just as important as one carried
out on a new welding machine.
Furthermore, in this way manufacturer can be protected
from being held responsible for defects when the fault is
someone else.
4.2.1 Precautions to take while servicing:
•
EXCESSIVE PRESSURE can break circuit board.
•
Use only minimal pressure and gentle movements when
disconnecting or connecting board plugs and removing or
installing board.
•
INCORRECT INSTALLATION OR MISALIGNED PLUGS
CAN DAMAGE CIRCUIT BOARD.
•
Be sure that plugs are properly installed and aligned before
reinstalling cover.
4.3 TROUBLESHOOTING
DEFECT
PROBABLE CAUSE
REMEDY
The welding
Switch in 0 position
Switch to I
machine does
position
not supply
current;
Burnt fuses
Replace fuses
completely
unoperative
Plug not perfectly
Insert plug
inserted in power
supply socket
The welding
Block pilot on
Turn machine
machine does
off and on
not supply
again (see2.3.2)
voltage but the
ventilator
Thermostat open
Wait approx.
functions
5-6 min.
5 GENERAL PRECAUTIONS
5.1 Fire
•
Avoid causing fire because of sparks,
slag, hot metal or pieces.
•
Make sure that suitable fire-proof
devices are available close to welding
area.
•
Remove all flammable and combustible material from
welding area and its surrounding (min. 30 feet).
•
Do not weld containers of combustible or flammable
material, even when empty. These must be carefully
cleaned before being welded.
•
Allow the welded material to cool down before touching it
or putting it in contact with combustible or flammable
material.
•
Do not weld parts with hollow spaces, containing
flammables.
•
Do not work under conditions with high concentrations of
combustible vapours, gases, or flammable dust.
NO
YES
Fig.4
