Elettro CF MMA 148 Instruction Manual page 6

2.3 UNIT DESCRIPTION
A) Power ON LED.
B) Yellow LED (see 2.2).
C) Welding current adjustment potentiometer.
D) Output terminal (-)
E) Adjust an over-current that makes it possible to maximize
transferring the electrode drop to the workpiece. This
function is not active in TIG welding.
F) Adjusts an over-current that may be inserted to aid in
striking the arc. This function is active in both MMA and
TIG modes.
G) Connector
H) Output terminal (+).
I) Mains cable
K) Switch.
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.
2.5 COATED ELECTRODE WELDING
- This welding machine is suitable for welding all types of
electrodes.
- Use the electrode holder clamps in compliance with the
safety standards and without projecting tightening screws.
- Make sure that the switch K (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
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- Turn the machine on by means of the switch K (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 welding current using the knob C, the hot start
using the knob F and the arc force using the knob E. We
recommend adjusting the arc force to between 0 and 2 for
rutile electrodes, between 2 and 4 for basic electrodes, and
between 4 and 8 for cellulosic electrodes.
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")
ø 2 mm (0,080")
- 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 .
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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 the machine on using the switch K (picture 1).
- Adjust the welding current using the knob C and the hot start
using the knob F according to the work to be carried out, then
open the valve placed on the torch to allow the emission of
gas.
- Strike the arc by contact using a firm, rapid stroke.
CAUTION: do not use commercial ignition devices.
- When you have finished to weld, always remember to turn off
6
.
direct current
negative electrode
(Argon)
fino a 60A
60 : 160A
80 : 200A