Unit Description; General Notes; Tig Welding - Elettro CF MMA 135 Instruction Manual

2.3 UNIT DESCRIPTION

A) Input voltage general switch.
B) Welding current adjustment potentiometer.
C) Texas connections.
D) Thermal and electrode anti-sticking protections signal.

2.4 GENERAL NOTES

Before using this welding machine, carefully read the
standards CEI 26/10 CENELEC HD 427 and also check
insulation of cables, electrode holder clamp, sockets and plugs
and that the section and length of welding cables are
compatible with current used:
2
up to 5 m use 16 mm ,
from 5 to 20 m use 25 mm
from 20 to 30 m use 35 mm
WARNING: This equipment does not comply with IEC 61000-
3-12. If it is connected to a public low voltage system, it is the
responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment may be connected.
2.5 COATED ELECTRODE WELDING
- Use the electrode holder clamps in compliance with the
safety standards and without projecting tightening screws.
- Make sure that the switch A (picture 1) is in O position or that
the plug is not inserted in supply socket then connect welding
cables in accordance with polarity demanded by the
manufacturer of the electrodes which you will be using.
- Welding circuit should not be deliberately placed in direct or
indirect contact with protection wire if not in the piece to be
weld.
- If earthing is deliberately made on the workpiece by means
of the protection wire, the connection must be as direct as
possible, with the wire having a section at least equal to the
welding return current wire and connected to the piece,
being worked on, in the same place as the return wire, using
the return wire terminal or a second earth terminal close by.
- All possible precautions must be taken in order to avoid stray
currents.
- When taking voltage from a three-phase line, be very
careful when connecting the supply cable earth wire to
the socket earth pole.
- Connect the supply cable. When mounting a plug, make sure
that its capacity is adequate and that the yellow-green wire of
the supply cable is connected to the earth plug pin.
- The sections of all extensions should be adequate to
absorbed current I .
1
2
,
2
.
- Turn the machine on by means of the switch A (picture 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 electrode holder and earth clamp at the same
time.
- Adjust the current according to the diameter of the electrode,
to the welding position and to the type of joint to be carried
out.
When you have finished to weld, always remember to turn off
the unit and to remove the electrode from the electrode
holder.

2.6 TIG WELDING

- This welding machine is fit for welding with TIG procedure:
stainless steel, iron and copper.
- Connect the earth cable wire to the positive (+) pole of the
welding machine and the terminal to the working piece as
close as possible to the welding machine, making sure there
is a good electrical contact.
- Connect the connector of the TIG torch to the negative (-)
pole of the welding machine.
- The welding machine circuit should not be deliberately in
direct or indirect contact with protection conductor if not in the
piece to be welded.
- If earthing is deliberately made on the workpiece by means of
protection wire, the connection must be as direct as possible,
with the wire having a section at least equal to the welding
return current wire and connected to the piece being worked
on, in the same place as the return wire, using the return wire
terminal or a second earth terminal close by.
- All possible precautions must be taken in order to avoid stray
currents.
- Connect gas pipe to pressure reducer output connected to an
ARGON cylinder.
- Open the valve on the torch and regulate gas capacity.
- Use a 2% thoriated tungsten electrode chosen according to
table.
electrode ø
2% thoriated tungsten
(red band)
ø 1 mm (0,040")
ø 1,6 mm (1/16")
- Make sure that mains voltage corresponds to the voltage of
the welding machine.
- Connect the supply cable: when mounting a plug, make sure
that its capacity is adequate and that the yellow-green wire of
the supply cable is connected to the earth plug pin.
- Any extensions should have adequate sections for absorbed
I
current .
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 on the machine on with switch A (picture 1).
- Regulate current according to the work to be carried out, then
open the valve placed on the torch to allow the emission of
gas. Start the arc by contact, with a determined rapid
movement.
CAUTION: do not use commercial ignition devices.
When you have finished to weld, always remember to turn off
the machine and to close the gas cylinder valve.
6
direct current
negative electrode
(Argon)
up to 60A
60 ÷ 160A