Limitations; Controls And Settings - Lincoln Electric PRO-CUT 25 SVM149-A Service Manual

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LIMITATIONS

Do not exceed output current and duty cycle rating of
machine. Do not use the PRO-CUT 25 for pipe thaw-
ing.

CONTROLS AND SETTINGS

PRESSURE REGULATOR
CAP
When preparing to cut, position the machine as close
to the work as possible. Make sure you have all mate-
rials needed to complete the job and have taken all
safety precautions. It is important to follow these oper-
ating steps each time you use the machine.
• Turn the machine's ON/OFF POWER SWITCH to
OFF position.
• Connect the air supply to the machine.
• Turn the main power and the machine power switch
on.
- The fan should start.
- The pre-charge circuit will operate for 3 seconds,
then the green "Power" LED should turn on.
• Be sure that the work lead is clamped to the work-
piece before cutting.
• Set the output current control knob at maximum
position for higher cutting speed and less dross for-
mation. Reduce the current, if desired to reduce the
kerf (cut) width, heat affected zone or travel speed
as required.
1
Maximum output requires a 30 amp input circuit and breaker. Refer to the
Technical Specifications for proper input circuit guidelines.
OPERATION
• Push-in and hold the Purge button to check or set
the gas pressure. Pull the pressure regulator cap out
and turn it to set the pressure.
- Adjust the gas regulator for 65 PSI for 15' or 25'
torches.
- Release the Purge button.
- The gas will immediately turn off. The pressure
gage may show an increase in pressure after the
air turns off but this is normal. Do NOT reset the
pressure while the air is NOT flowing.
• When ready to cut, place the torch near the work,
make certain all safety precautions have been taken
and pull the trigger.
- The air will flow for a preflow time of 2 seconds
and the pilot arc will start. (Exceptions: the first
time that the trigger is pulled after the machine is
turned on, or after a thermal tripout, will be
ignored. This is a safety feature to prevent the
pilot arc from firing unexpectedly or if the torch
button is pressed because it is laying up against
something. The other exception is if the machine
is in postflow, then the preflow time is skipped
and the pilot arc will start immediately.)
- The pilot arc will run for 3.0 seconds and shut off
unless the arc is brought in contact with the work
and the arc is transferred. Avoid excessive pilot
arc time by transferring the arc to the workpiece
quickly.
- When the arc is brought within 1/8" - 1/4" from
the work piece: the arc will transfer, the current
will ramp to the setting on the control panel, and
the cut can last indefinitely (or until the duty
cycle of the Pro-Cut is exceeded).
• Pierce the work piece by slowly lowering the torch
onto the metal at a 30
This will blow the dross away from the torch tip.
Slowly rotate the torch to vertical position as the arc
becomes deeper.
30 30
1
• Keep moving while cutting. Cut at a steady speed
without pausing. Maintain the cutting speed so that
the arc leg is 10° to 20° behind the travel direction.
PRO-CUT 25
0 angle away from the operator.
0
TORCH AT 30 ANGLE
TO PIERCE
ROTATE TO
0
90 ANGLE TO CUT
0 0
0
90
VER VERTICAL TICAL ANGLE ANGLE
FOR CUTTING FOR CUTTING
CUT
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