Telwin Technomig 180 Dual Synergic Manual De Instrucciones página 7

THE POWER SUPPLY.
THE ELECTRIC CONNECTIONS MUST ONLY BE CARRIED OUT BY
EXPERT OR QUALIFIED TECHNICIANS.
Return cable-clamp assembly
POSITIONING THE WELDING MACHINE
Choose the place where the welding machine is to be installed so that
there are no obstructions to the cooling air inlets and outlets; at the same
time make sure that conductive dust, corrosive vapours, humidity etc.
cannot be drawn into the machine.
Leave at least 250 mm of free space all around the welding machine.
WARNING! Position the welding machine on a level surface
with sufficient load-bearing capacity, so that it cannot be tipped over
or shift dangerously.
CONNECTION TO THE MAIN POWER SUPPLY
- Before making any electrical connection, check the rating plate data on
the welding machine to make sure they correspond to the voltage and
frequency of the available power supply where the machine is to be
installed.
- The welding machine must be connected only and exclusively to a
power supply with the neutral conductor connected to earth.
- To guarantee protection against indirect contact use the following
types of residual current devices:
- A type ( ) for single-phase machines.
- In order to satisfy the requirements of the EN 61000-3-11 (Flicker)
standard we recommend connecting the welding machine to the
interface points of the main power supply that have an impedance of
less than Zmax = 0.15 ohm.
- The IEC/EN 61000-3-12 Standard does not apply to the welding
machine.
If the welding machine is connected to an electrical grid, the installer
or user must make sure that the machine can indeed be connected (if
necessary, consult the company that manages the electrical grid).
Plug and outlet
Connect the power supply plug to a mains socket fitted with fuses or an
automatic circuit-breaker; the corresponding earth terminal should be
connected to the (yellow-green) earth conductor of the power supply.
Table 1 (TAB. 1) shows the recommended delayed fuse sizes, in amps, for
the main supply, which have been chosen according to the maximum
rated current output from the welding machine, and to the nominal
power supply voltage.
WARNING! Non-compliance with the above regulations
renders the manufacturer's safety system (class I) inefficient, with
resulting serious risks to people (e.g. electric shock) and things (e.g.
fire).
WELDING CIRCUIT CONNECTIONS
WARNING! BEFORE CARRYING OUT THE FOLLOWING
CONNECTIONS MAKE SURE THAT THE WELDING MACHINE IS
SWITCHED OFF AND DISCONNECTED FROM THE POWER SUPPLY.
Table 1 (TAB. 1) shows the recommended sizes of the welding cables
(in mm ), according to the maximum current output from the welding
2
machine.
Connecting to the gas bottle (if used)
- The gas bottle that can be positioned on the trolley supporting surface:
max 30kg.
- Screw the pressure reducer(*) onto the gas bottle, inserting the
appropriate adapter supplied as an accessory when Argon or an Argon/
CO mixture is used.
2
- Connect the gas input hose to the reducer and tighten the clamp.
- Loosen the adjustment ring nut on the pressure reducing valve before
opening the gas bottle valve.
(*) Accessory to be purchased separately if not supplied with the product.
Connecting the welding current return cable
Must be connected to the workpiece or to the metal bench on which it is
Fig. D
positioned, keeping it as close as possible to the joint being done.
Torch
Prepare the torch when loading the wire for the first time, by dismantling
the nozzle and the contact tip, to ease its exit.
Polarity change
- Open the door of the reel space.
- MIG/MAG welding (gas):
- Connect the torch cable coming from the wire feeder to the red
terminal (+).
- Connect the return cable clamp to the black terminal (-).
- FLUX welding (no gas):
- Connect the torch cable coming from the wire feeder to the black
terminal (-).
- Connect the return cable clamp to the red terminal (+).
- Close the door of the reel space.
Recommendations:
- Screw the welding cable connectors right down into the quick
couplings (if present), so as to ensure perfect electrical contact;
otherwise, the connectors will overheat, wear rapidly and become
inefficient.
- Use welding cables that are as short as possible.
- Do not use metal structures that are not part of the workpiece to
substitute the welding current return cable; this could endanger safety
and produce an unsatisfactory weld.
LOADING THE WIRE REEL (Fig. E)
WARNING! BEFORE STARTING THE OPERATIONS TO LOAD
THE WIRE MAKE SURE THE WELDING MACHINE IS SWITCHED OFF
AND DISCONNECTED FROM THE MAIN POWER SUPPLY OUTLET.
MAKE SURE THAT THE WIRE FEEDER ROLLERS, THE WIRE GUIDE HOSE AND
THE CONTACT TIP OF THE TORCH MATCH THE DIAMETER AND TYPE OF
WIRE TO BE USED AND MAKE SURE THAT THESE ARE FITTED CORRECTLY.
WHEN INSERTING AND THREADING THE WIRE DO NOT WEAR PROTECTIVE
GLOVES.
- Open the reel compartment door.
- Position the wire reel on the spindle, holding the end of the wire
upwards; make sure the tab for pulling the spindle is correctly seated in
its hole (1a).
- Release the pressure counter-roller(s) and move them away from the
lower roller(s) (2a-b);
- Make sure that the towing roller(s) is suited to the wire used (2c).
- Free the end of the wire and remove the distorted end with a clean cut
and no burr; turn the reel anti-clockwise and thread the end of the wire
into the wire-guide infeed, pushing it 50-100mm into the wire guide of
the torch fitting (2d).
- Re-position the counter-roller(s), adjusting the pressure to an
intermediate value, and make sure that the wire is correctly positioned
in the groove of the lower roller(s) (3)
- Remove the nozzle and contact tip (4a).
- Insert the welding machine plug in the power supply outlet, switch on
the welding machine, press the torch button and wait for the end of the
wire to pass through the whole of the wire guide hose and protrude by
10-15 cm from the front part of the torch, release the button.
WARNING! During these operations the wire is live and
subject to mechanical stress; therefore if adequate precautions are
not taken the wire could cause hazardous electric shock, injury and
striking of electric arcs:
- Do not direct the mouthpiece of the torch towards parts of the body.
- Keep the torch away from the gas bottle.
- Re-fit the contact tip and the nozzle onto the torch (4b).
- Check that wire feed is regular; set the roller and spindle braking
pressure to the minimum possible values making sure that the wire
does not slide in the groove and when feed is halted the loops of wire
are not loosened by excessive reel inertia.
- Cut the end of the wire so that 10-15 mm protrude from the nozzle.
- Close the reel compartment door.
6. WELDING: DESCRIPTION OF PROCEDURE
SHORT ARC
The wire melts and the bead detaches as a result of the subsequent short-
- 7 -
Fig. B