Telwin ELECTROMIG 220 SYNERGIC Bedienungsanleitung Seite 7

THE ELECTRIC CONNECTIONS MUST ONLY BE CARRIED OUT BY EXPERT OR
QUALIFIED TECHNICIANS.
Return cable-clamp assembly
Assembling the welding cable electrode-holder clamp
Assembling the torch hanging hook
5.1 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.
5.2 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:
- Type A ( ) for single-phase machines.
- Type B ( ) for 3-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 = 0.24 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).
5.2.1 Plug and outlet
(1~)
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.
(3~)
Connect a normalised plug (3P + P.E) - 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! 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).
5.3 WELDING CIRCUIT CONNECTION
5.3.1 Recommendations
ATTENTION! BEFORE
CONNECTIONS, MAKE SURE THE WELDING MACHINE IS OFF AND
DISCONNECTED FROM THE MAINS.
Table 1 (TAB. 1) gives the recommended values for welding cables (in mm
to the maximum energy supplied by the welding machine.
In addition:
- Fully rotate the welding cable connectors in the quick couplings (if present), to
guarantee perfect electric contact; if this is not the case the connectors will overheat
with consequent fast deterioration and loss of efficiency.
- Use the shortest welding cables possible.
- Do not use metal structures that are not part of the workpiece to replace the welding
current return cable; this can endanger safety and give unsatisfactory welding
results.
5.3.2 WELDING CIRCUIT CONNECTION IN MIG-MAG MODE
5.3.2.1 Connecting the gas bottle (if used)
- Gas bottle that can be loaded onto the supporting surface of the trolley: max. 30 kg.
- When using Argon gas or an Argon/CO
onto the gas bottle valve, placing the relative pressure reducing valve supplied as an
accessory.
- Connect the gas input hose to the pressure reducing valve and tighten the strip.
- Loosen the adjustment ring nut of the pressure reducing valve before opening the
gas bottle valve.
(*) Accessory to be purchased separately if not supplied with the product.
5.3.2.2 Connecting the welding current return cable
Connect the cable to the piece to be welded or the metal bench on which the workpiece
is placed, as close as possible to the joint being worked.
5.3.2.3 Torch
Prepare the torch to receive the wire for the first time, removing the nozzle and the
contact pipe, to make exiting easier.
5.3.2.4 Polarity change
- Open the reel area door.
Fig. D
Fig. E
FIG. F
CARRYING OUT THE FOLLOWING
mixture 2 , screw the pressure reducer(*)
2
Fig. B
- MIG/MAG welding (gas):
- Connect the torch cable to the red clamp (+) (Fig. B-9)
- Connect the clamp return cable to the negative quick coupling (-) (Fig. B-5)
- FLUX welding (no gas):
- Connect the torch cable to the black clamp (-) (Fig. B-10).
- Connect the clamp return cable to the positive quick coupling (-) (Fig. B-4).
- Close the reel area door.
5.3.3 WELDING CIRCUIT CONNECTION IN TIG MODE
5.3.3.1 Connecting the gas bottle
- Screw the pressure reducer onto the gas bottle valve, placing the relative reduction
supplied as an accessory between them;
- Connect the gas input hose to the pressure reducing valve and tighten the supplied
strip.
- Loosen the adjustment ring nut of the pressure reducing valve before opening the
gas bottle valve.
- Open the gas bottle and adjust the quantity of gas (l/min.) according to the
recommended usage data, see table (TAB. 5); the gas flow can be adjusted while
welding, always using the ring nut of the pressure reducer. Check the seal of the
hoses and connections.
ATTENTION! Always close the gas bottle valve when you have finished
working.
5.3.3.2 Connecting the welding current return cable
- Connect it to the piece to be welded or the metal bench on which the workpiece is
placed, as close as possible to the joint being worked. Connect this cable to the
clamp with the symbol (+) (Fig. B-4).
5.3.3.3 Torch
- Insert the current cable into the relative quick coupling (-) (Fig. B-5). Connect the gas
hose of the torch to the gas bottle
5.3.4 WELDING CIRCUIT CONNECTION IN MMA MODE
Almost all the coated electrodes are connected to the positive pole (+) of the generator,
with an exception for acid coated electrodes, which must be connected to the negative
pole (-).
5.3.4.1 Welding wire clamp electrode-holder connection
Takes a special clamp for tightening the uncovered part of the electrode to the terminal.
Connect this cable to the clamp with the symbol (+) (Fig. B-4).
5.3.4.2 Connecting the welding current return cable
- Connect it to the piece to be welded or the metal bench on which the workpiece is
placed, as close as possible to the joint being worked. Connect this cable to the
clamp with the symbol (-) (Fig. B-5).
5.4 LOADING THE WIRE REEL (Fig. G)
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);
- Make sure that the towing roller(s) is suited to the wire used (2b).
- 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 (2c).
- 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).
) according
2
- 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. MIG-MAG WELDING PROCESS DESCRIPTION
6.1 SHORT ARC
The wire melts and the weld bead detaches because the wire tip in the weld pool short-
circuits (up to 200 times per second). The free length of the wire (stick-out) is normally
between 5 and 12 mm.
Carbon steel and low-alloys
- Usable wire diameter:
- Usable gas:
Stainless steel
- Usable wire diameter:
- Usable gas:
Aluminium and CuSi/CuAl
- Usable wire diameter:
- Usable gas:
- 7 -
0.6 - 0.8 - 1.0 mm
CO or Ar/CO mixes
2 2
0.8 - 1.0 mm
Ar/O or Ar/CO (1-2%) mixes
2 2
0.8 - 1.0 mm
Ar