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b) TIME
or POWER
by keeping the [-] key pressed for 3 seconds, the welding time
increased or decreased as to the value set automatically by the machine
;
by keeping the [+] key pressed for 3 seconds, the welding power
be increased or decreased as to the value set automatically by the machine;
NOTE: by programming the spot welding power, the factory-programmed current
value (5 kA), which is suitable for an installed power of 10 kW, can be modified.
IMPORTANT: TAB. 1 gives the correspondence between the
selected current and the maximum network power, which must be available
in the installation area (installed power), to prevent the line protection from
cutting in untimely.
It is a good idea to adjust the programming both if the "default" value
is not sufficient for top spot execution with the selected thickness
(the corresponding thickness flashes) or, when the installed power is
compatible, selecting 7 kA and guaranteeing greater operation safety in all
applications.
As a result, programming with lower current values limits the maximum
thickness that can be welded.
4. LCD display
5.
Signals that the
key must be pressed to prepare the machine for welding.
6.
Shows the sheet thickness and possible alarm codes.
7.
It can be activated by connecting the Studder gun either with or without trigger
(contact activation version).
8a.
Indicates the spot welding of plugs, rivets, washers and special washers with
suitable electrodes.
8b.
Indicates the spot welding of screws having a diameter of 4-6 and rivets having a
diameter of 5 with suitable electrode.
8c.
Indicates individual spot welding with suitable electrode.
8d.
Indicates sheet tempering with the carbon electrode.
8e.
Indicates sheet upsetting with the relative electrode.
8f.
Indicates intermittent spot welding for sheet patching with relative electrode.
9.
Indicates the level of the welding time
set value
.
10.
Indicates that impulse spot welding has been activated (only for pneumatic
clamps).
11.
Indicates that a "manual" clamp, not a "pneumatic" one, is being used.
12.
Indicates that the clamp being used is energised.
13-14-15.
indicate double tip clamp,
activated using the Studder gun.
16.
Is the thickness of the sheet to be welded.
17.
Indicates that the machine is being thermostatically protected.
18.
Indicates that the hot stapler is being used to weld plastic parts.
SELECTION FUNCTION :
or
respect at the automatically
indicate "X" clamp,
can be
19.
Indicates the measurement unit of the metal sheet thickness .
4.2.2 Pressure regulator and gauge unit (fig. B-8)
Adjusts the pressure applied to the pneumatic clamp electrodes using the adjustment
can
knob and modifies the clamp cooling air flow where programmed. We recommend
setting the maximum pressure below 8 bar.
4.3 SAFETY FUNCTIONS AND INTERLOCK
4.3.1 Safeguards and alarms (TAB. 2)
a) Thermostatic safeguard:
Intervenes if the spot welding machine overheats because the cooling liquid is
missing or is insufficient, or due to a work cycle that exceeds the permitted limit.
The icon on the display (fig. C-17) switches on to signal intervention and with:
AL1 = machine thermal alarm.
AL2 = clamp, studder thermal alarm.
EFFECT: movement blocked, electrodes opened (cylinder at discharge); current
blocked (welding inhibited).
RESET: manual (use the "START" push-button when the permitted temperature
limits are reached - the [symbol] icon switches off).
b) Main switch:
- Position "O" = open and lockable (see chapter 1).
ATTENTION! When at position "O" the internal clamps L1+L2(N)
that connect the power cable are being powered.
- Position "I" = closed: stapler being powered but not operating (STAND BY - the
"START" push-button must be pressed).
- Emergency function
With the spot welding operating, the opening (pos. "I"=>pos "O") determines a
stop in safety conditions:
- current inhibited;
- electrodes open (cylinder at discharge);
- automatic restarting inhibited.
ATTENTION! PERIODICALLY MAKE SURE THE SAFETY STOP
OPERATES CORRECTLY.
c) Cooling unit safety (AQUA version)
Cuts in when there is no cooling water, or when the water pressure level drops;
The intervention is signalled on the display by AL 9 = no water alarm.
EFFECT: movement blocked, electrodes opened (cylinder at discharge); current
blocked (welding inhibited).
RESET: top-up the cooling liquid then switch the machine off and on again (see
also Par. 5.6 "cooling unit configuration").
d) Over and under voltage protection
The intervention is signalled on the display by AL 3 = overvoltage alarm and by AL
4 = undervoltage alarm.
EFFECT: movement blocked, electrodes opened (cylinder at discharge); current
blocked (welding inhibited).
RESET: manual (use the "START" push-button).
e) "START" push-button (Fig. C-5).
This push-button must be pressed to control welding in each of the following
conditions:
- when the master switch is switched off (pos "O" => pos "I");
- each time the safety/protection devices cut in;
- after the power supply (electricity and compressed air) has been returned after
being disconnected upstream or after a failure;
ATTENTION! PERIODICALLY MAKE SURE SAFE STARTING
OPERATES CORRECTLY.
5. INSTALLATION
ATTENTION! CARRY OUT ALL INSTALLATION AND ELECTRICAL AND
PNEUMATIC CONNECTION OPERATIONS WITH THE SPOT WELDING MACHINE
RIGOROUSLY SWITCHED OFF AND DISCONNECTED FROM THE MAINS.
THE ELECTRICAL AND PNEUMATIC CONNECTIONS MUST ONLY BE CARRIED
OUT BY EXPERT OR QUALIFIED TECHNICIANS.
5.1 PREPARATION
Unpack the spot welding machine, and assemble the detached parts that are in the
packaging as indicated in this chapter (Fig. D).
5.2 LIFTING (Fig. E).
The spot welding machine must be lifted with a double cable and hooks that are of a
suitable size for the machine weight, using the relative M8 rings.
Slinging the spot welding machine using means other than those indicated is
FORBIDDEN.
5.3 POSITION
Reserve a space in the installation area that is large enough and without obstacles
for guaranteeing access to the control panel, the main switch and the work area in
complete safety.
Make sure there are no obstacles near the areas where the cooling air enters and exits,
ensuring that conductive power, corrosive vapour, humidity, etc. cannot be sucked in.
can be
Place the spot welding machine on a surface of homogeneous material that is flat and
compact, and suitable for supporting the weight (see "technical data") to prevent the
danger of toppling or dangerous movements.
5.4 CONNECTION TO THE POWER NETWORK
5.4.1 Warnings
Before making any electrical connection, make sure the spot welding machine plate
data correspond with the mains voltage and frequency available in the installation
area.
The spot welding machine must only be connected to a power supply system with
neutral conductor connected to earth.
To guarantee protection against indirect contact, use residual-current devices of the
following type:
-
Type A (
) for single-phase machines;
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