Lincoln Electric INVERTEC PC 65 Manuel D'utilisation page 9

The machine doesn't operate without its safety
protection device (torch protection sleeve) properly
mounted.
Always turn OFF the machine when working on the
torch.
K. Positive Quick Disconnect: Positive output
connector for the cutting circuit. As far the ground
connection, this is to be connected to the work piece
and to a "DINSE" connector on the front of the
power source.
L. Power Switch: It turns ON / OFF the input power to
the machine.
M. Input cable: Connect it to the mains.
N. Gas Inlet and Pressure Regulator: Connect here
the hose carrying the gas to the machine.
The air plasma cutting process uses air as primary
cutting gas and as torch cooling gas. The air circuit
includes a pressure regulator set at 5bar.
The pilot arc is struck by energizing a first
electrovalve (solenoid valve). Once the cutting arc
is activated a second electrovalve (solenoid valve)
is energized allowing the primary air the flow. This
valve lets the air flow only when driven by the
electronic logic devices during the pre-flow, post-
flow and cutting stages, or if the Gas Test switch on
the front panel is turned on.
A clean, dry air or nitrogen must be supplied to the
machine. A pressure setting above 7,5bar could
damage the torch.
precautions could result in excessive operating
temperatures or damage to the torch.
O. Fan: Provides machine cooling. It is switched ON
with the machine and continues to run till the
machine is turned OFF.
WARNING
WARNING
WARNING
Failure to observe these
The design concept at the basis of these power sources
is to have available a current which remains constant at
the set value, independently from the length of the
plasma arc.
•
Connect the torch [J] and the work cable [K].
• Turn ON the Power Switch [L] placed on the back of
the machine; the LED [C] on the front panel will turn
ON. One second after the switching ON a "click"
from the starter relay will be heard; the unit is now
ready to operate.
•
Check through the Gas Test [B] switch that the
primary air [N] is available. The working pressure
should be set at 5bar.
• Set the desired current value with the Output
Current [A] knob.
To start the cutting process just press the torch button,
making sure you are not aiming the torch air blow
towards people or foreign objects. During the cutting
process it is possible to hold the torch away from the
work piece for an extended period of time.
•
Avoid to touch the work piece directly with the torch,
when you do not have the torch with the proper
nozzles.
•
The arc length should not be more than 6-7mm.
Once the cutting process is terminated releasing off the
torch button will cause the plasma arc to be turned off;
the air flow will continue for approximately 30sec. (post-
flow) to allow the cooling down of the torch.
Maintenance
For any maintenance or repair operations it is
recommended to contact the nearest technical service
center or Lincoln Electric.
performed by unauthorized service centers or personnel
will null and void the manufacturers warranty.
The frequency of the maintenance operations may vary
in accordance with the working environment. Any
noticeable damage should be reported immediately.
• Check cables and connections integrity. Replace, if
necessary.
•
Regularly clean the torch head, check its
consumables and if necessary replace them. Refer
to the torch instruction manual before changing or
servicing the torch.
Refer to the instructions before changing or
servicing the torch.
•
Keep clean the machine. Use a soft dry cloth to
clean the enclosing case, especially the airflow inlet
/ outlet louvers.
Do not open this machine and do not introduce anything
into its openings. Power supply must be disconnected
from the machine before maintenance and service. After
each repair, perform proper tests to check safety
requirements.
A-4
WARNING
Maintenance or repairs
WARNING
WARNING