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B-4
OPERATION
B-4
LIMITATIONS
Do not exceed output current and duty cycle rating of
machine. Do not use the PRO-CUT 55 for pipe thaw-
ing.
CONTROLS AND SETTINGS
When preparing to cut or gouge, position the machine
as close to the work as possible. Make sure you have
all materials needed to complete the job and have
taken all safety precautions. It is important to follow
these operating 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.
- If the "SAFETY" LED is lit, push the "Reset" but-
ton. If there is no problem, the LED will go off. If
there is a problem, refer to Step "SAFETY LED"
in this section.
• Be sure that the work lead is clamped to the work-
piece before cutting.
• Set the output current control knob at maximum
position for high cutting speed and less dross forma-
tion. Reduce the current, if desired to reduce the
kerf (cut) width, heat affected zone or travel speed
as required.
• 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 70 PSI for 25’ torch-
es or 75 PSI for 50’ 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. (This is true unless
the machine is in postflow, then the preflow time
is skipped and the pilot arc will start immediate-
ly.)
- 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 to improve parts life.
- When the arc is brought within 1/4" from the
work piece: the arc will transfer, the current will
ramp up to the setting on the control panel, and
the cut can last indefinitely (or until the duty
cycle of the Pro-Cut is exceeded). Do not touch
the nozzle to the work when cutting with the
control panel setting above mid range or dam-
age to the consumables will result.
• Pierce the work piece by slowly lowering the torch
onto the metal at a 30
0
angle away from the opera-
tor. This will blow the dross away from the torch tip.
Slowly rotate the torch to vertical position as the arc
becomes deeper.
PRO-CUT 55
OFF
OFF
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PRO-CUT 55
Torch
Connector
Work
Cable
Input
Power
Switch
Output
Control
Knob
Consumable
Storage
(behind
door)
Status
Board
Indicators
Reset
Button
Gas
Purge
Button
Gas
Regulator
Gauge
Gas
Regulator
Knob
30
30
0
0
VER
VER
TICAL ANGLE
TICAL ANGLE
FOR CUTTING
FOR CUTTING
CUT
90
0
TORCH AT 30
0
ANGLE
TO PIERCE
ROTATE TO
90
0
ANGLE TO CUT