Maintenance - Helvi PC EVO 76 Manual De Instrucciones

Frequently review the Important Safety
Precautions at the front of this Manual. Be
sure the operator is equipped with proper
gloves, clothing, eye and ear protection.
Make sure no part of the operator's body
comes into contact with the work piece
while the torch is activated.
Maintenance can only be carried out on the unit if the
person in charge of this operation has the necessary
technical knowledge and the correct tools. If this is
not the case, contact your nearest service centre.
CAUTION!
Never access inside the machine (panel re-
moval) or touch the torch (disassemblage)
without having disconnected power plug.
Any inspection performed under voltage
inside the machine or inside the torch may
cause severe electric shocks caused by di-
rect contact with parts under voltage.
UNIT
Keep the cutting or gouging area and the area
around the machine clean and free of combustible
materials. No debris should be allowed to collect ,
this could obstruct air flow to the machine.
Inspect the unit every 3-4 months (depending on
how often the unit is used) and use compressed air
to remove any dust deposits.
CAUTION!
Only use dry compressed air for cleaning.
Do not point the jet of air at the electronic
circuits.
TORCH
Periodically, according to its use or to cutting faults
verify wear of the parts connected to plasma arc:
Shield Cup:
Unscrew manually from head of the torch. Clean
throughly abd replace if damaged (burns, distortions
or cracks). Verify integrity of superior metal sector
(actuator torch safety).
Tip:
Check wear of plasma arc hole and of inner and
outer surfaces. If the hole is widened compared to
its original width or if it is damaged, replace tip. If
surfaces are particularly oxidated clean them with
extra fine abrasive paper.
Air Distributor:
Verify the are no burns or cracks or that airflow holes
are not obstructed. If damaged, replace immediately.
Electrode:
Replace electrode when crater settling on emitting
surface is about 2mm.
CAUTION
Sparks from the cutting process can cause
damage to coated, painted, and other sur-
faces such as glass, plastic and metal.
NOTE
Handle torch leads with care and protect
them from damage.

MAINTENANCE

WARNING!
• Before making any operation to the torch let
it cool at least all along the "postgas" period.
• Except for particular cases it is advisable to
replace electrode and tip AT THE SAME TIME.
• Respect assembly order of torch parts (reser-
ved compared to disassemblage).
• Be carefull that distributing is assembled pro-
perly.
• Reassemble shield cup screwing tightly and
manually.
• Never assemble shield cup without having
assembled electrode distributing ring and tip
beforehand.
• Timely and appropriate control procedures
on torch parts are essential for safety and
functionality of the cutting system.
TORCH BODY, HANDLE AND CABLE
• These parts usually need no particular main-
tenance with the exception of a periodic in-
spection and an accurate cleaning to be
made WITHOUT THE USE OF SOLVENTS.
• In case of damages to the insulation such as
breaks, cracks and burns or even a loosening
of electric coonductors, the torch CANNOT
BE USED FURTHER SINCE SAFETY CONDI-
TIONS HAVE NOT BEEN RESPECTED.
• IN THIS CASE, REPAIRING (EXTRAORDINA-
RY MAINTENANCE) CANNOT BE MADE ON
SITE BUT NEEDS TO BE DELEGATED TO A
SERVICE CENTER TO MAKE SPECIAL REST
TRIALS AFTER REPAIRING HAS BEEN EXECU-
TED.
In order to keep the torch and the cable efficient it
is necessary to follow these precautions:
• DO NOT touch torch and cable with warm
or hot parts.
• DO NOT strain the cable.
• DO NOT move the cable on sharp edges or
abrasive surfaces.
• gather the cable in regular coils if it is too
long.
• DO NOT step on the cable.
COMPRESSED AIR FILTER
The unit is also equipped with an air filter which
captures water and oil vapor.
Water contained in the filter glass gets drained au-
tomatically by disconnecting compressed air by the
unit.
EN-13