Optional Equipment - Telwin HF Serie Manual De Instrucciones

Front Panel
1 - Positive quick plug (+) to connect welding cable
2 - Negative quick plug (-) to connect welding cable
3 - Potentiometer to regulate welding current with
graduated scale in Amps, which
also allows regulation during welding.
4 - YELLOW LED: normally off, when ON it means that the
welding current cannot flow due to one of the following
faults:
- Thermal protection: inside the machine the
temperature is excessive. The machine is ON but does
not deliver current until a normal temperature is
reached. Once this happens the re-start is automatic.
- Mains over/undervoltage protection: when mains
voltage is either too high (over 260 V ac) or too low
(under 190 V ac) the machine is blocked.
- Shor t circuit protection: in case there is a short-circuit
lasting more than 1.5 sec. (electrode sticking), the
machine stops. The re-start is automatic.
5- WELDING PROCESS selector AND TORCH
PUSHBUTTON FUNCTIONS:
Welding with coated electrode (MMA)
TIG welding
Torch pushbutton released
4-stroke cycle with BI-LEVEL: the first time the button
is pressed it triggers the machine, which supplies a
current equal to the setting on the BI-LEVEL
potentiometer (5-100% of the main current). When the
button is released the current increases to the welding
current value; this value is also maintained when the
button is released. Then each time the button is pressed
(there should be a short space of time between
pressure and release) the current will vary between the
value of the BI-LEVEL potentiometer setting and the
"main current" potentiometer value. When the button is
kept pressed down for a long time the current will
decrease to nothing. The time taken for the current to fall
is equal to the setting on the down slope potentiometer.
Torch pushbutton pressed
Selection to be adapted also when using the foot remote
control (v. OPTIONS).
6- Potentiometer to start and regulate current slope down
time (after "OFF" torch pushbutton), scale A/S
7- Potentiometer to regulate BI-LEVEL current.
8 - Pipe fitting for connection of the TIG torch gas tube.
9- Connector for connection torch pushbutton cable.
MASS OF WELDING MACHINE (T able 1)
OPTIONS
- Manual remote control: it enables the regulation of the
welding current directly from the work station, by a knob.
- Foot remote control: it enables the regulation of the
welding current continuosly according to the pressure
exerted by the foot on the remote control. It permits also
the start and the stop of the welding (stop in rest
position) without operating the torch pushbutton.
- Remote control TIG-PULSE: enables DC TIG welding
with pulse current. It is also possible to regulate from far
All manuals and user guides at all-guides.com
Fig. C
away the main parameters.
- By this procedure and on special applications, some
positive characteristics of the TIG welding are
highlighted such as:
- Small welding puddle, better control of the thermal
value, limited heating.
- Passes of calking iron bottom, welds on thin thickness
and/or in position.
- Welding on metals easily cracked under heating.
- Better control of penetration on the head-flat-horizontal
joints without filler rod.
- Possibility to execute better welds on pieces of various
thicknesses as well as of different steels (i.e. inox and
low-alloyed steels).
CAUTION:
The remote adjustment elements are active also when
the selector is in the "electrode" position (M.M.A.).
REMOTE TIG PULSE REGULATOR
1 - Potentiometer "Ib": regulates intensity of the back
ground current
2 - Potentiometer "Ip": regulates intensity of pulse current
3 - Potentiometer (with switch) "tp": regulates pulse current
time (duration) (from 0,1 to 3s +/- 10%). When the
potentiometer is in OFF position the pulse current is
inhibited; however, the "Ib" potentiometer enables the
normal regulation of the welding current from far away.
4 - Potentiometer "tb": regulates the time interval between
the current pulses as well as the duration of the back
ground current (0,1 -3s +/- 10%).
5 - (Red) led: it signals pulse current; "ON" during pulse,
"OFF" on interval.
N.B. : The maximum value of the welding current that
can be regulated from far away coincides with the value
set on the regulating potentiometer in the generator TIG

OPTIONAL EQUIPMENT:

- TIG welding torch (4m), ready for welding, provided with
Tungsten-Ce 2% electrode diam. 1,6; T ungsten-Ce 2%
electrode diam. 1 and relevant accessories are
provided.
- Gas regulator with manometer.
- Welding current return cable with earth terminal
- Gas pipe fitting and gas tube for connection with Argon
cylinder.
TECHNICAL DAT A
Technical data relative to the performance of the machine
may be found on a plate (back panel) with the following
symbols, whose meaning is explained below.
1- EUROPEAN Norm of reference, for safety and
construction of arc welding machines.
2- Symbol for internal machine structure: inverter
transformer -rectifier.
3- Symbol for welding procedure provided: manual arc
welding with covered electrode, Tig
4- Symbol S: indicates that welding operations may be
carried out in environments with heightened risk of
electric shock (e.g. very close to large metallic volumes).
5- Symbol for power supply line:mono alternating voltage.
6- Protection degree: IP 23. Protected against solid foreign
bodies of diam.
vertical fall of water drops with inclination up to 60° from
12
Fig. D
Fig. E
12.5 mm (e.g. fingers) and against