Maintenance And Control - Elettro PLASMA 35 INVERTER Betriebsanleitung

3.5 PRACTICAL RECOMMENDATIONS
• If the system air contains much humidity and oil it is required to use a drying filter to avoid excessive oxidation and wear of
consumable parts, to avoid torch damage or to reduce speed and quality of cutting.
• Impurities of air favour oxidation of electrode and nozzle and make it difficult to start pilot arc. If this occurs, clean the end part of
electrode and inside the nozzle with fine abrasive paper.
• Make sure that new electrode and nozzle to fit are clean and degreased.
• To avoid damage of torch always use original spares.
3.6 TORCH MAINTENANCE (SEE PICTURE 3)
Always disconnect the unit before any repair of torch.
1) Replace wear parts
The parts subject to wear are electrode A, diffuser B and nozzle C. Either part may be only replaced after loosening nozzle holder D.
Electrode A should be replaced when a 1/16" (1,5 mm) deep crater is created in the middle (see picture 10).
Nozzle C should be replaced when its central hole is damaged or enlarged with respect to the new part (see picture 11). Use of worn
electrode quickly wears out the nozzle. Excessive use of electrode causes overheating and reduces the life of diffuser B. Make sure
that after replacing it, nozzle D is tight enough.
ATTENTION!! Nozzle holder D should be only screwed on head when electrode A diffuser B and nozzle C are assembled.
2) Replace torch body E (see picture 3).
Remove screw V. Withdraw handle F from body E by swaying it and making sure that button wires are not torn when separating both
parts. Withdraw the G and H safety contacts wires. Withdraw the contact L. Unscrew fitting I after cutting the insulating hose K.
Assemble the new body of torch making all above operations inversely. Fitting I is insulated by shrink hose K stuck to the fitting when
heated by a small source (ex. a lighter). Before replacing handle make sure that cables are far away from each other and that fittings
are tightly secured.
3) Replacement of handle with button.
To replace handle with button it is required to follow instructions as per pos. 2.

3.7 MAINTENANCE AND CONTROL

It is recommended to keep nozzle free from slag. Avoid using sharpened bodies thus avoiding damaging the nozzle hole. Even if the
unit is provided with an automatic device for water discharge, working whenever air feed is closed, it is recommended to check from
time to time that no water remains in the trap of reducer. It is required to clean from time to time the unit inside and make it free from
metal dust by means of compressed air. Operations to be carried out inside the unit must be effected after disconnecting feed cable.
3.7.1 PRECAUTIONS TO TAKE AFTER A REPAIR
After making repairs, take care to re-order the cables so that there is sure to be insulation between the primary and the secondary
sides of the machine. Make sure that the wires cannot come into contact with moving parts or parts that heat during operation. Replace
all clamps in their original positions on the machine, to prevent a connection between the primary and secondary circuits if a conductor
accidentally breaks or disconnects.
CUTTING VELOCITY DIAGRAM
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