Telwin 954374, Instruction Manual

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D), after spot welding it as described previously, the spindle (POS. 1, Fig. D) keeping
the terminal tightened towards the extractor (POS. 2, Fig. D). When completely
introduced, release the spindle and start drawing. When finished, pull the spindle
towards the hammer to remove the plug.
WARNING:
when the work has been completed, place the tools on an insulating surface and
switch off the machine!
7. MAINTENANCE
WARNING! BEFORE CARRYING OUT MAINTENANCE, MAKE SURE
THE MACHINE IS OFF AND DISCONNECTED FROM THE MAINS.
7.1 ROUTINE MAINTENANCE
ROUTINE MAINTENANCE CAN BE CARRIED OUT BY THE OPERATOR.
- adaptation/restoration of the diameter and profile of the electrode tip;
- replacement of the electrodes;
- check the integrity of the power cable;
- check the integrity of the gun and output cables.
7.2 SPECIAL MAINTENANCE
SPECIAL MAINTENANCE MUST ONLY BE CARRIED OUT BY TECHNICIANS WHO
ARE EXPERT OR QUALIFIED IN AN ELECTRIC-MECHANICAL AMBIT.
WARNING! BEFORE REMOVING THE SPOT WELDING MACHINE OR
GUN PANELS AND ACCESSING THE UNIT, MAKE SURE THE SPOT WELDING
MACHINE IS SWITCHED OFF AND DISCONNECTED FROM THE MAIN POWER
AND PNEUMATIC SUPPLIES (if present).
Carrying out checks while the inside of the spot welder is live can cause serious
electric shock due to direct contact with live parts and/or injury due to direct contact
with moving parts.
Periodically and as frequently as required by the use and environmental conditions,
inspect inside the spot welder and clamp and remove the dust and metal particles that
have deposited on the transformer, diode module, power terminal board, etc. using a
blast of dry compressed air (max. 5 bar).
Do not direct the jet of compressed air onto the electronic circuit board; if necessary
clean with a very soft brush or suitable solvents.
At the same time:
- Make sure the wiring does not show signs of insulation damage or loose-oxidised
connections.
- Make sure the screws that connect the transformer secondary with the output bars
/ wires are tight and that there are no signs of oxidation or overheating.
8. TROUBLESHOOTING
SHOULD MACHINE OPERATION NOT BE SATISFACTORY, AND BEFORE
CARRYING OUT MORE SYSTEMATIC CHECKS OR CONTACTING YOUR
TECHNICAL ASSISTANCE CENTRE, MAKE SURE THAT:
- With the main switch of the spot welder closed (pos. “ I “) the display is lit; if not
the problem is in the power line (cables, plug and socket, fuses, excessive voltage
drop, etc.).
- The display does not show the alarm signals (see TAB. 1): when the alarm stops
press “START” to reactivate the spot welder.
- The elements that are part of the secondary circuit (gun - cables) are not inefficient
because of loose screws or oxidation.
- The welding parameters are suitable for the work to be carried out
- After having carried out maintenance or repairs, restore the connections and wiring
as they were before, making sure they do not come into contact with moving parts
or parts that can reach high temperatures. Band all the wires as they were before,
being careful to keep the primary high voltage connections separate from the
secondary low voltage ones.
Use all the original washers and screws when re-closing the structural work.