Connecting The Torch; Power Source - Telwin MIG-MAG Manual De Instrucciones

5.5.2 Connection to the wire feeder
- Make the connections with the electrical generator (rear panel):
- welding current cable to quick connection (+);
- control cable to appropriate connector.
- Make sure the connectors are firmly tightened in order to prevent overheating and
loss of efficiency.
- Connect the gas pipe from the pressure-reducing valve on the bottle and lock it with
the clip supplied.
5.5.3 Connecting the welding current return cable
- This is connected to the piece being welded or to the metal bench supporting it, as
close as possible to the join being made.
- This cable is connected to the terminal with the symbol (-).

5.5.4 Connecting the torch

- Engage the torch with its dedicated connector by tightening the locking ring
manually as far down as it will go.
- Prepare the wire for loading the first time by dismantling the nozzle and the contact
tip to ease its exit.
5.5.5 Warnings
- Turn the welding cable connectors right down into the quick connections (if present),
to ensure a perfect electrical contact; otherwise the connectors themselves will
overheat, resulting in their rapid deterioration and loss of efficiency.
- The welding cables should be as short as possible.
- Do not use metal structures which are not part of the workpiece to substitute the
return cable of the welding current: this could jeopardise safety and result in poor
welding.
5.6 LOADING THE WIRE REEL (FIG. G)
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WARNING! BEFORE STARTING THE OPERA TIONS TO LOAD THE WIRE
MAKE SURE THE WELDING MACHINE IS SWITCHED OFF AND DISCONNECTED
FROM THE MAIN POWER SUPPLY OUTLET .
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MAKE SURE THAT THE WIRE FEEDER ROLLERS, THE WIRE GUIDE HOSE AND
FIG. F
FIG. G
A
THE CONTACT TIP OF THE TORCH MATCH THE DIAMETER AND TYPE OF WIRE
TO BE USED AND MAKE SURE THA T THESE ARE FITTED CORRECTLY. WHEN
INSERTING AND THREADING THE WIRE DO NOT WEAR PROTECTIVE GLOVES.
- 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 (1).
- Release the pressure counter-roller/s and move it/them away from the lower roller/s
(2-2a).
- 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 (2-2a).
- Re-position the counter-roller/s, adjusting the pressure to
make sure that the wire is correctly positioned in the groove of the lower roller (3-3a).
- Use the adjustment screw located at the centre of the spindle to apply a slight braking
pressure on the spindle itself.
- Remove the nozzle and contact tip.
- Close the door protecting the rollers (only for the 4 roller version).
- Turn the 2T -4T selection switch on the wire feeder to "2T". Connect the welding
machine to the power supply and turn it on, press the torch button or the wire feed
button on the control panel (if installed) and wait until the end of the wire passes
through the length of the liner and comes out by 10-15cm from the front of the torch
and then release the button.
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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.
- Direct the torch head away from your body.
- Keep the torch away from the gas bottle.
- Re-fit the contact tip and the nozzle onto the torch.
- 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 10-15mm protrude from the nozzle.
- Close the feeder door.
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GAS GAS
B
(*) MAX 5m
- 24 -
an intermediate value, and
(*) THIS LIMITATION IS ONLY VALID
FOR WATER-COOLED
TORCHES.
A

POWER SOURCE

B
WIRE FEEDER
(2 roll)
(4 roll)