Output Connections; Front Control Panel - Lincoln Electric PRO-CUT 25 Bedienungsanleitung

turning it on. The allowable input voltage
is indicated in the technical specification
section of this manual and on the rating
plate of the machine. Verify the
connection of grounding wires from the
machine to the input source.
Make sure the amount of power available
from the input connection is adequate for
normal operation of the machine. The
necessary fuse and cable sizes are indicated
in the technical specification section of this
manual.
This machine is designed to operate on
engine driven generators as long as the
230Vac auxiliary can supply adequate
power as indicated in the technical
specification section of this manual. The
auxiliary supply of the generator must also
meet the following conditions.
• The AC waveform peak voltage is below
400V.
• The AC waveform frequency is between
50 and 60 hertz.
• The RMS voltage of the AC waveform is
always greater than 208Vac.
It is important to check these conditions
because many engine driven generators
produce high voltage spikes. Operation of
this machine on engine driven generators
not conforming to these conditions is not
recommended and may damage the
machine.
Compressed Air or Gas Connection
A source of clean, dry air or nitrogen must
be supplied to the machine. Oil in the air is
a severe problem and must be avoided, use
an oil filter if necessary. The supply
pressure must be between 5.0 to 10.3 Bar
and the flow rate is approximately 113
L/min. Failure to observe these
precautions could result in excessive
operating temperatures or damage to the
torch.

Output Connections

This machine is sent from the factory with
a PCT-20 cutting torch and work clamp
installed. The work clamp must be securely
connected to the work piece. If the work
piece is painted or extremely dirty it may
be necessary to expose the bare metal in
order to make a good electrical
connection. Do not remove the work
clamp during cutting, plasma cutting
generates high voltages that can kill.

Front Control Panel

The POWER SWITCH controls the input
power to the machine. After input power
is connected and this switch is turned on,
the back lit POWER symbol on the control
panel will light up to indicate the machine
is ready.
The PURGE button is used to turn on the
flow of compressed air through the torch.
While pressing this button the air pressure
supplied to the torch can be regulated
using the built-in regulator and pressure
gage. Set the air pressure to 4.4 Bar while
air is flowing through the torch. Air flow is
required for proper adjustment.
The OUTPUT CURRENT KNOB is used to set
the output current used during cutting,
from 12A to 25A. The pilot arc current
does not change, it is always 12A.
The back lit GAS PRESSURE symbol on the
control panel will light up to indicate when
the inlet air pressure is too low. The inlet
air pressure must be between 5.0 and 10.3
Bar. The machine will not operate when
this GAS PRESSURE symbol is lit.
The back lit THERMAL symbol on the
control panel will light up when the
machine is overheated and the output has
been turned off. This will occur if the
ambient temperature is above 40°C and
the duty cycle of the machine has been
exceeded. Leave the machine on to allow
the internal components to cool, when
THERMAL symbol turns off normal
operation is possible
The back lit SAFETY symbol on the control
panel will light up when the machine
detects a parts-in-place error. A parts-in-
place error means that a problem with the
torch consumables has been detected and
the output of the machine has been
disabled. To correct this error, turn the
machine off and inspect the torch
consumables. The consumables must be in
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