Kennedy EMW220 Manual page 6

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.
Connecting the torch (only for versions with EURO connector)
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 tube to
ease its exit.
Changing the polarity
(only for GAS-NO GAS versions)
- Open the reel compartment door.
- MIG/MAG welding (gas):
- Connect the torch cable from the wire feeder to the red terminal
(+).
- Connect the clamp return cable to the black terminal (-).
- FLUX welding (no gas):
- Connect the torch cable from the wire feeder to the black
terminal (-).
- Connect the clamp return cable to the red terminal (+).
- Close the reel compartment door.
LOADING THE WIRE REEL (Fig. H)
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.
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)
- Use the adjustment screw located at the centre of the spindle to
apply a slight braking pressure on the spindle itself (1b).
- 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 THE PROCEDURE
- Connect the return cable to the piece to be welded.
- Check the polarity (only for FLUX versions).
- If solid wire is used, open and adjust the flow of shielding gas by
means of the pressure reducer.
NOTE: remember to shut the shielding gas off when you finish
work.
- Switch the welder on and set the welding current by means of the
switches or rotary switch (if any).
- To start welding press the torch button.
- To adjust the welding parameters adjust the wire feed rate (where
provided) using the appropriate knob until even welding is
obtained (Fig.B-3).
SPOT WELDING FUNCTION (where provided)
- To change the welding time operate the adjustment knob (Fig.B-5).
Fig. G
Fig. I
Fig. L
WARNING:
- In some models the wireguide tip is normally live; take care to
prevent unwanted strikes.
- The indicator light comes on when there is overheating and cuts off
the power supply; it will reset automatically within a few minutes,
after cooling down.
7. MAINTENANCE
WARNING! BEFORE CARRYING OUT MAINTENANCE
OPERATIONS MAKE SURE THE WELDING MACHINE IS
SWITCHED OFF AND DISCONNECTED FROM THE MAIN POWER
SUPPLY.
ROUTINE MAINTENANCE:
ROUTINE MAINTENANCE OPERATIONS CAN BE CARRIED OUT
BY THE OPERATOR.
Torch
- Do not put the torch or its cable on hot pieces; this would cause the
insulating materials to melt, making the torch unusable after a very
short time;
- Make regular checks on the gas pipe and connector seals;
- Every time the wire reel is changed, blow out the wire-guide hose
using dry compressed air (max. 5 bar) to make sure it is not
damaged;
- Before every use, check the wear and correct assembly of the parts
at the end of the torch: nozzle, contact tip, gas diffuser.
Wire feeder
- Make frequent checks on the state of wear of the wire feeder
rollers, regularly remove the metal dust deposited in the feeder
area (rollers and wire-guide infeed and outfeed).
WHEN
EXTRAORDINARY MAINTENANCE:
EXTRAORDINARY MAINTENANCE OPERATIONS SHOULD BE
CARRIED OUT ONLY AND EXCLUSIVELY BY SKILLED OR
AUTHORISED ELECTRICAL-MECHANICAL TECHNICIANS.
WARNING! BEFORE REMOVING THE WELDING MACHINE
PANELS AND WORKING INSIDE THE MACHINE MAKE SURE THE
WELDING MACHINE IS SWITCHED OFF AND DISCONNECTED
FROM THE MAIN POWER SUPPLY OUTLET.
If checks are made inside the welding machine while it is live, this
may cause serious electric shock due to direct contact with live
parts and/or injury due to direct contact with moving parts.
- Inspect the welding machine regularly, with a frequency
depending on use and the dustiness of the environment, and
remove the dust deposited on the transformer, reactance and
rectifier using a jet of dry compressed air (max. 10 bar).
- Do not direct the jet of compressed air on the electronic boards;
these can be cleaned with a very soft brush or suitable solvents.
- At the same time make sure the electrical connections are tight
and check the wiring for damage to the insulation.
- At the end of these operations re-assemble the panels of the
welding machine and screw the fastening screws right down.
- Never, ever carry out welding operations while the welding
machine is open.
_______________(I)______________
MANUALE ISTRUZIONE
ATTENZIONE:
PRIMA DI UTILIZZARE LA SALDATRICE LEGGERE
ATTENTAMENTE IL MANUALE DI ISTRUZIONE.
SALDATRICI A FILO CONTINUO PER LA SALDATURA AD ARCO
MIG/MAG E FLUX PREVISTE PER USO INDUSTRIALE E
PROFESSIONALE.
Nota: Nel testo che segue verrà impiegato il termine "saldatrice" .
1. SICUREZZA GENERALE PER LA SALDATURA AD ARCO
L'operatore deve essere sufficientemente edotto sull'uso sicuro
della saldatrice ed informato sui rischi connessi ai procedimenti
per saldatura ad arco, alle relative misure di protezione ed alle
procedure di emergenza.
(Fare riferimento anche alla "SPECIFICA TECNICA IEC o CLC/TS
62081": INSTALLAZIONE ED USO DELLE APPARECCHIATURE
PER SALDATURA AD ARCO).
- Evitare i contatti diretti con il circuito di saldatura; la tensione
a vuoto fornita dal generatore può essere pericolosa in talune
circostanze.
- La connessione dei cavi di saldatura, le operazioni di verifica e
di riparazione devono essere eseguite a saldatrice spenta e
- 6 -