Telwin 115 Bedienungsanleitung Seite 8

Internal polarity change Fig. B1
- Open the reel area door.
- MIG/MAG welding (gas):
- Connect the torch cable to the red clamp (+) (Fig. B-11)
- Connect the clamp return cable to the negative fast coupling (-) (Fig.
B-12).
- FLUX welding (no gas):
- Connect the torch cable to the black clamp (-) (Fig. B-12).
- Connect the clamp return cable to the positive fast coupling (+) (Fig.
B-11).
- Close the reel area door.
External polarity change (multiprocess version only) Fig. B1
- MIG/MAG welding (gas):
- Connect the torch cable to the torch coupling (Fig. B-4).
- Connect the fast coupling plug (Fig. B-7) to the positive coupling
plug (+) (Fig. B-5).
- Connect the clamp return cable to the negative fast coupling (-) (Fig.
B-6).
- FLUX welding (no gas):
- Connect the torch cable to the torch coupling (Fig. B-4).
- Connect the fast coupling plug (Fig. B-7) to the negative coupling (-)
(Fig. B-6).
- Connect the clamp return cable to the positive fast coupling (+) (Fig.
B-5).
WELDING CIRCUIT CONNECTIONS IN TIG MODE
Gas cylinder connection
- Screw the pressure reducer onto the cylinder gas valve, if necessary,
inserting the specific reduction supplied as an accessory.
- Connect the input hose of the gas reducer and tighten with the
supplied strip.
- Loosen the adjustment ring nut of the pressure reducer before opening
the cylinder valve.
- Open the cylinder and adjust the quantity of gas (l/min) according to
the illustrative use data, see table (TAB. 5); any adjustments in gas flow
can be carried out during welding always using the pressure reducer
ring nut. Check the tubing and fittings.
WARNING! Always close the gas cylinder valve at the end
of work.
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. Connect this cable to the clamp with the symbol (-) (Fig. B-6).
Torch
- Insert the current cable in the specific fast clamp (+) (Fig. B-5). Connect
the gas hose of the torch to the cylinder.
WELDING CIRCUIT CONNECTIONS IN MMA MODE
Almost all the coated electrodes should be connected to the positive pole
(+) of the generator; an exception is the negative pole (-) for electrodes
with acid coating.
Connection of the electrode-holder clamp welding cable (Fig. D2)
Bring a special clamp on the clamp used to tighten the exposed part of
the electrode. Connect this cable to the clamp with the symbol (+) (Fig.
B-5).
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. Connect this cable to the clamp with the symbol (-) (Fig. B-6).
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-
circuits in the wire tip positioned in the weld pool (up to 200 times per
second). The wire stick-out is normally between 5 and 12 mm.
Carbon, low-alloy steel
- Usable wire diameter:
- Usable gas:
Stainless steel
- Usable wire diameter:
- Usable gas:
Aluminium and CuSi
- Usable wire diameter:
- Usable gas:
Core wire
- Usable wire diameter:
- Usable gas:
PROTECTION GAS
The protective gas flow rate must be 8-14 l/min.
SYNERGIC OPERATION:
ADJUSTING THE WELDING BEAD
The bead shape is adjusted using the knob (Fig. C-4) which adjusts the
arc length and thus determines the greater or lesser intake of the sealing
temperature.
Referring to the table available in the machine (Fig. F), set the knob
(Fig. C-4) depending on the material, wire and gas used. The points A,
B, C, D represent good starting points for welding in different working
conditions.
Convex shape: it means that there is a low thermal transfer,
therefore the welding, is "cold", with little penetration; rotate the knob
clockwise to obtain a higher thermal transfer with the effect of a weld
with higher fusion.
Concave shape: it means that there is a high thermal transfer,
therefore the welding is too "hot", with excessive penetration; turn the
knob counterclockwise to obtain a lower melting.
SETTING THICKNESS
The setting of the thickness is carried out by adjusting the knob (Fig. C-3).
This knob regulates the welding power according to sheet thickness and
- 8 -
0.6 - 0.8mm (1.0mm - version 180A)
(1.0 - 1.2mm - version 220A)
CO or Ar/CO
2
0.8mm (1.0mm - version 180A and 220A)
Ar/O or Ar/CO mixtures (1-2%)
2 2
0.8 - 1.2mm (140A, 180A and 220A version)
0.8 - 0.9mm (115A version)
mixtures
2
0.8 - 1.0mm
Ar
None