Publicité
Les langues disponibles
Les langues disponibles
N.B.: ALARMS STORING AND DISPLAY
With every alarm the machine's settings are recorded. It is possible to recall the last 10
alarms as follows:
Press pushbutton (6a) "REMOTE COMMAND" for a few seconds.
Code "AY.X" is displayed, where "Y" indicates the alarm number (A0 most recent, A9
oldest) and "X" indicates the type of alarm recorded (from 1 to 9, see AY.1 ... AY.9).
4.3 STORING AND RECALLING OF PERSONALISED PROGRAMS
Introduction
The welding machine allows the storing (SAVE) of personalised work programs relative to
a set of parameters applicable to a defined welding process. Each personalised program
can be accessed (RECALL) at any time thus allowing the user to have the welding machine
"ready for use" for a specific work cycle optimised previously. The welding machine allows
the saving of up to 9 personalised programs.
Storing procedure (SAVE)
After having adjusted the welding machine with an optimal set-up for a specific type of
welding job, proceed as follows (FIG. D2):
a) Press the "SAVE" button (8) for 3 seconds.
b) Code "S_ " is displayed (10) together with a number ranging between 1 and 9.
c) By rotating knob (9), select the number with which the program is going to be stored.
d) Press the "SAVE" button (8) again:
- if the "SAVE" button is pressed for more than 3 seconds, the program is correctly stored
and caption "YES" is displayed;
- if the "SAVE" button is pressed for less than 3 seconds, the program does not get stored
and caption "no" is displayed.
Recalling procedure (RECALL)
Proceed as follows (see FIG. D2):
a) Press the "RECALL" button (8) for 3 seconds.
b) "r_ " appears on display (10) together with a number between 1 and 9.
c) By rotating knob (9), select the number with which the program that we now intend
using was stored.
d) Press "RECALL" button (8) again:
- if the "RECALL" button is pressed for more than 3 seconds, the program is correctly
recalled and caption "YES" is displayed;
- if the "RECALL" button is pressed for less than 3 seconds, the program does not get
recalled correctly and caption "no" is displayed.
NOTES:
- DURING OPERATIONS WITH THE "SAVE" AND "RECALL" BUTTONS, LED "PRG" IS
SWITCHED ON.
- A RECALLED PROGRAM CAN BE MODIFIED AT WILL BY THE OPERATOR, BUT THE
MODIFIED VALUES ARE NOT AUTOMATICALLY STORED. SHOULD THE NEW VALUES
ON THE SAME PROGRAM HAVE TO BE STORED, THE STORING PROCEDURE MUST BE
PERFORMED.
- RECORDING OF PERSONALISED PROGRAMS RELATIVE TO THE SCHEDULING
(SAVING) OF ASSOCIATED PARAMETERS, IS THE USER'S RESPONSIBILITY.
4.4 G.R.A. water cooling unit ENABLING and DISABLING instructions (where
applicable)
Disabling procedure:
1- Press the main switch (2-FIG. C) simultaneously with the right button on the front panel
to turn the machine on (6e-FIG. D2).
2- The code "G.r.a - on" will appear on the display after the machine is turned on (factory
settings: cooling unit disabled).
3- Turn the encoder knob (9-FIG. D2) until the code "G.r.a - OFF" appears on the display.
4- Press the button once to confirm the selection (7-FIG. D2).
The cooling unit will thereby be disabled, the welding machine can be used without G.R.A.
and without the polarised plug.
ATTENTION! IF THE WELDING MACHINE IS USED IN "G.r.a - OFF" MODE WITH
THE COOLING UNIT CONNECTED, THE COOLING UNIT IS NOT COMPLETELY PROTECTED
FROM MALFUNCTIONING.
Enabling procedure:
Repeat the same sequence confirming the code "G.r.a. - on" to enable the unit.
NB: If the welding machine is set to "G.r.a. - on" mode, but no cooling unit has been
connected, the cooling circuit malfunction protection will be triggered after a couple of
seconds of operation (code "A. 9").
Factory setting: "G.r.a - on".
5. INSTALLATION
WARNING! CARRY OUT ALL INSTALLATION OPERATIONS AND ELECTRICAL
CONNECTIONS WITH THE WELDING MACHINE COMPLETELY SWITCHED OFF
AND DISCONNECTED FROM THE POWER SUPPLY OUTLET.
THE ELECTRICAL CONNECTIONS MUST BE MADE ONLY AND EXCLUSIVELY BY
AUTHORISED OR QUALIFIED PERSONNEL.
5.1 PREPARATION
Unpack the welding machine, assemble the separate parts contained in the package.
5.1.1 Assembling the return cable-clamp (FIG. E)
5.1.2 Assembling the welding cable-electrode holder clamp (FIG. E)
5.2 POSITION OF THE WELDING MACHINE
Choose the place to install the welding machine so that the cooling air inlets and outlets
are not obstructed (forced circulation by fan, if present); at the same time make sure that
conductive dusts, corrosive vapours, humidity etc. will not be sucked into the machine.
Leave at least 250mm free space around the welding machine.
WARNING! Position the welding machine on a flat surface with sufficient
carrying capacity for its weight, to prevent it from tipping or moving
hazardously.
5.3 CONNECTION TO THE MAIN POWER SUPPLY
- Before making any electrical connection, make sure the rating data of the welding
machine correspond to the mains voltage and frequency available at the place of
installation.
- The welding machine should only be connected to a power supply system with the
neutral conductor connected to earth.
- To ensure protection against indirect contact use residual current devices of the following
types:
- Type A (
) for single phase machines;
- Type B (
) for 3-phase machines.
- To comply with the requirements of the EN 61000-3-11 (Flicker) standard we recommend
connecting the welding machine to interface points of the power supply that have an
impedance of less than Zmax = 0.228ohm (1~), Zmax = 0.283ohm (3~).
- The welding machine falls within the requisites of IEC/EN 61000-3-12 standard.
5.3.1 Plug and outlet
Connect a normalised plug (2P + P.E) (1~); (3P + P.E) (3~) - having sufficient capacity- to the
power cable and prepare a mains outlet fitted with fuses or an automatic circuit-breaker;
the special earth terminal should be connected to the earth conductor (yellow-green) of
the power supply line. Table (TAB.1) shows the recommended delayed fuse sizes in amps,
chosen according to the max. nominal current supplied by the welding machine, and the
nominal voltage of the main power supply.
WARNING! Failure to observe the above rules will make the (Class 1) safety
system installed by the manufacturer ineffective with consequent serious
risks to persons (e.g. electric shock) and objects (e.g. fire).
5.4 CONNECTION OF THE WELDING CABLES
WARNING! BEFORE MAKING THE FOLLOWING CONNECTIONS MAKE SURE
THE WELDING MACHINE IS SWITCHED OFF AND DISCONNECTED FROM THE
POWER SUPPLY OUTLET.
Table (TAB. 1) gives the recommended values for the welding cables (in mm
on the maximum current supplied by the welding machine.
5.4.1 TIG welding
Connecting the torch
- Insert the torch current cable into the appropriate quick terminal (-)/~. Connect the three-
pin connector (torch button) to the appropriate socket. Connect the torch gas pipe to the
appropriate connector.
Connecting the welding current return cable
- This is connected to the piece to be welded or to the metal bench on which it rests, as
close as possible to the joint being made.
This cable is connected to the terminal with the (+) symbol (~ for TIG machines designed
for AC welding).
Connecting the gas bottle
- Screw the pressure reducing valve to the gas bottle valve, first inserting the special
reduction accessory supplied when argon gas is used.
- Connect the gas inflow hose to the pressure reducing valve and tighten the hose clamp
supplied.
- Loosen the ringnut for adjusting the pressure reducing valve before opening the valve on
the bottle.
- Open the valve on the bottle and adjust the quantity of gas (l/min) according to the
suggestions for use given in the table (TAB. 4); if it is necessary to adjust the gas flow
during welding this should always be done by adjusting the ring nut on the pressure
reduction valve. Make sure there are no leaks in the piping and connectors.
WARNING! Always close the gas bottle valve at the end of the job.
5.4.2 MMA WELDING
Almost all coated electrodes are connected to the positive pole (+) of the power source; as
an exception to the negative pole (-) for acid coated electrodes.
Connecting the electrode-holder clamp welding cable
On the end take a special terminal that is used to close the uncovered part of the electrode.
This cable is connected to the terminal with the symbol (+)
Connecting the welding current return cable
This is connected to the piece being welded or to the metal bench supporting it, as close as
possible to the join being made.
This cable is connected to the terminal with the symbol (-)
Warnings:
- Turn the welding cable connectors right down into the quick connections (if present), to
ensure a perfect electrical contact; otherwise the connectors themselves will overheat,
resulting in their rapid deterioration and loss of efficiency.
- The welding cables should be as short as possible.
- Do not use metal structures which are not part of the workpiece to substitute the return
cable of the welding current: this could jeopardise safety and result in poor welding.
6. WELDING: DESCRIPTION OF THE PROCEDURE
6.1 TIG WELDING
TIG welding is a welding procedure that exploits the heat produced by the electric arc that
is struck, and maintained, between a non-consumable electrode (tungsten) and the piece
to be welded. The tungsten electrode is supported by a torch suitable for transmitting the
welding current to it and protecting the electrode itself and the weld pool from atmospheric
oxidation, by the flow of an inert gas (usually argon: Ar 99.5) which flows out of the ceramic
nozzle (FIG. G).
To achieve a good weld it is absolutely necessary to use the exact electrode diameter with
the exact current, see the table (TAB. 3).
The electrode usually protrudes from the ceramic nozzle by 2-3mm, but this may reach
8mm for corner welding.
Welding is achieved by fusion of the edges of the joint. For properly prepared thin pieces
(up to about 1mm) weld material is not needed (FIG. H).
For thicker pieces it is necessary to use filler rods of the same composition as the base
material and with an appropriate diameter, preparing the edges correctly (FIG. I). To
achieve a good weld the pieces should be carefully cleaned and free of oxidation, oil, grease,
solvents etc.
6.1.1 HF and LIFT strike
HF strike:
The electric arc is struck without contact between the tungsten electrode and the piece
being welded, by means of a spark generated by a high frequency device. This strike mode
does not entail either tungsten inclusions in the weld pool or electrode wear and gives an
easy start in all welding positions.
Procedure:
Press the torch button, bringing the tip of the electrode close to the piece (2 -3mm), wait for
the arc strike transferred by the HF pulses and, when the arch has struck, form the weld pool
on the piece and proceed along the joint.
If there are difficulties in striking the arc even though the presence of gas is confirmed and
the HF discharges are visible, do not insist for long in subjecting the electrode to HF action,
but check the integrity of the surface and the shape of the tip, dressing it on the grinding
wheel if necessary. At the end of the cycle the current will fall at the slope down setting.
LIFT strike:
The electric arc is struck by moving the tungsten electrode away from the piece to be
welded. This strike mode causes less electrical-radiation disturbance and reduces tungsten
inclusions and electrode wear to a minimum.
Procedure:
Place the tip of the electrode on the piece, using gentle pressure. Press the torch button
right down and lift the electrode 2-3mm with a few moments' delay, thus striking the arc.
Initially the welding machine supplies a current I
- 8 -
2
) depending
, after a few moments the welding
LIFT
Publicité
