Safety Warnings; Description Of The Welding Machine - DECAWELD SPOT Manuel D'instruction

Manutenzione
Spegni la saldatrice ed estrai la spina dalla presa d'alimentazione prima di effettuare
operazioni di manutenzione.
STUDDER
Torcia = controllare che il cavo non abbia tagli o abrasioni tali da aver scoperto i
conduttori interni.
Massa = controllare l'efficienza delle connessioni e del morsetto.
PUNTATRICI
Cavi = controllare che il cavo non abbia tagli o abrasioni tali da aver scoperto i conduttori
interni.
Tubi = controllare che non vi siano perdite di aria compressa in modo che non vi siano
perdite di pressione mentre si sta puntando.
Elettrodi = adeguamento / ripristino del diametro e del profilo della punta dell'elettrodo.
Controllo dell'allineamento degli elettrodi.
Manutenzione straordinaria effettuabile da personale esperto o qualificato in ambito
elettromeccanico periodicamente, in funzione dell'uso.
• Ispeziona l'interno della saldatrice e rimuovi la polvere depositata sulle parti elettriche
(usa aria compressa) e sulle schede elettroniche (usa una spazzola molto morbida o
dei prodotti appropriati). • Verifica che le connessioni elettriche siano ben serrate e che i
cablaggi non abbiano l'isolante danneggiato.
Instruction Manual
Read this instruction manual carefully before using the welding machine.
Resistance welding equipment, hereafter referred to as "welding machine", is used for
industrial and professional applications.
Make sure that the welding machine is installed and repaired only by qualified persons or
experts, in compliance with the law and with the accident prevention regulations.
These instructions refer to the machine as delivered. In case instructions are not strictly
followed or not recommended accessories and/or tools are used, the user shall be
responsible for assessing the risks and consequences of such acts.
The operator must be sufficiently informed on the safe use of the spot welder and on the
risks linked to the resistance welding procedures, to the related protection measures and
to the emergency procedures.

Safety warnings

„ Make sure that the power socket to which the welding machine is connected is protected
by suitable safety devices (fuses or automatic switch) and that it is grounded.
„ Make sure that the plug and power cable are in good condition.
„ Before plugging into the power socket, make sure that the welding machine is switched off.
„ Switch the welding machine off and pull the plug out of the power socket as soon as
you have finished working.
„ Do not touch any electrified parts with bare skin or wet clothing. Insulate yourself from the
electrode, the piece to be welded and any grounded accessible metal parts. Use gloves,
footwear and clothing designed for this purpose and dry, non-flammable insulating mats.
„ Use the welding machine in a dry, ventilated space. Do not expose the welding machine
to rain or direct sunshine.
„ Use the welding machine only if all panels and guards are in place and mounted correctly.
„ Do not use the welding machine if it has been dropped or struck, as it may not be safe.
Have it checked by a qualified person or an expert.
„ Eliminate any welding fumes through appropriate natural ventilation or using a smoke
exhauster. A systematic approach must be used to assess the limits of exposure to
welding fumes, depending on their composition, concentration and the length of exposure.
„ Do not weld materials that have been cleaned with chloride solvents or that have been
near such substances.
„ Use a welding mask with adiactinic glass suited for welding. Replace the mask if
damaged; it may let in radiation.
„ Wear fireproof gloves, footwear and clothing to protect the skin from the rays produced
by the welding arc and from sparks. Do not wear greasy garments as a spark could set
fire to them. Use protective screens to protect people nearby.
„ Some parts of the spot-welder (electrodes arms and nearby areas) may reach
temperatures of over 65°C: suitable protective clothing must be worn.
„ Metal-working gives off sparks and splinters. Wear safety goggles with protective side
eye guards.
„ Welding sparks can trigger fires.
„ Do not weld or cut anywhere near inflammable materials, gasses or vapours.
„ Do not weld or cut containers, cylinders, tanks or piping unless a qualified technician or
expert has checked that it is possible to do so, or has made the appropriate preparations.
950628-04 13/11/15
EN
„ The safeguards and moveable parts of the spot-welder casing should all be in position
before connection to the power supply.
„ All manual operations on moveable accessible parts of the spot welder, for example:-
Electrode replacement or maintenance, - Adjusting the position of the arms or electrodes
SHOULD BE CARRIED OUT WITH THE SPOT-WELDER SWITCHED OFF AND
DISCONNECTED FROM THE POWER SUPPLY
EMF Electromagnetic Fields
Welding current creates electromagnetic fields (EMF) near the welding circuits and
the welder. Electromagnetic fields may interfere with medical prostheses such as
pacemakers.
Suitable and sufficient measures should be implemented to protect those operators
having such aids. For instance, they should not be allowed to enter that area where
welding equipment is used. Any operator having such aids should consult their doctor
before coming close to an area where welding equipment is used.
This device meets the specific requirements of the product technical standard and is
intended for professional use in an industrial environment only. Compliance to expected
limits for human exposure to electromagnetic fields at home is not ensured.
Follow these strategies to minimise exposure to electromagnetic fields (EMF):
„ Do not place your body between the welding cables. Both welding cables should be on
the same side of your body.
„ Twist both welding cables together and secure them with tape when possible.
„ Do not wrap the welding cables around your body.
„ Connect the earth cable to the workpiece as close as possible to the area to be
welded.
„ Keep your head and trunk as far as possible from the welding circuit. Do not work
close to the welder, or seated or leaning on it. Minimum distance: Fig. 7 Da = cm 50;
Db = cm.20
Class A equipment
This equipment has been designed to be used in professional and industrial
environments.
If this equipment is used in domestic environments and those directly connected to a
low voltage power supply network which supplies buildings used for domestic purposes,
it may be difficult to ensure compliance to electromagnetic compatibility as the result of
conducted or radiated disturbances.
Welding in conditions of risk
„ If welding needs to be done in conditions of risk (electric discharges, suffocation, the
presence of inflammable or explosive materials), make sure that an authorised expert
evaluates the conditions beforehand. Make sure that trained people are present who
can intervene in the event of an emergency. Use the protective equipment described in
5.10; A.7; A.9 of the IEC or CLC/TS 62081 technical specification.
„ If you are required to work in a position raised above ground level, always use a safety
platform.
Additional warnings
„ It is dangerous to use the spot-welder for any other purpose than that for which it is
designed (spot resistance welding).
„ Place the welding machine on a flat stable surface, and make sure that it cannot move.
It must be positioned in such a way as to allow it to be controlled during use but without
the risk of being covered with welding sparks.
„ Do not lift the welding machine. No lifting devices are fitted on the machine.
„ Do not use cables with damaged insulation or loose connections.
Risk of upper limbs being crushed
Both the operating method for the spot-welder and the variability in shape and size of
the piece being welded make it impossible to provide integrated protection against the
danger of the upper limbs being crushed: fingers, hands, forearm.
The risk should be reduced by appropriate preventive measures:
¾ The operator should either be expert or trained in resistance welding procedures using
this type of appliance.
¾ There should be risk evaluation for every type of job to be done; equipment and masking
should be provided to support and guide the work-piece (unless a portable spot-welder
is used).
¾ Whenever the shape of the piece allows it, adjust the electrode distance so that the
stroke does not exceed 6 mm Fig.6.3
¾ Do not allow more than one person to work on the same spot-welder at the same time.
¾ Unauthorised persons should not be allowed in the working area.
¾ Do not leave the spot-welder unattended: in such a case it should be disconnected
from the power supply.
¾ The operator must use the pneumatic spot gun always holding it with both hands placed
on the handles. Fig.6.2

Description of the welding machine

Movable resistance welding system (spot-welder) with digital microprocessor control.
It allows numerous types of hot working and spot-welding on sheet metal and is made
specifically for the vehicle bodyshop and sectors with similar types of working.
Its main features are:
- automatic selection of welding parameters,
- selection of optimal welding current
- limitation of main supply inrush current at starting
Main parts Fig.1
1) Tool-function selector: STUDDER / PNEUMATIC SPOT GUN
2) Selector for SYNERGIC / MANUAL setting
7