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B-1
OPERATION
PRO-CUT 55
B-1
SAFETY PRECAUTIONS
Read and understand this entire section before oper-
ating the machine.
NOTE: All P.C. boards are protected by a moisture resis-
tant coating. When the plasma cutter is operated, this coat-
ing will "bake off" of certain power resistors that normally
operate at high temperatures emitting some smoke and
odor for a short time. These resistors and the P.C. board
beneath them may become darkened. This is a normal
occurrence and does not damage the component or affect
the machine performance.
DESCRIPTION
The Pro-Cut 55 is a constant current, continuous control
plasma cutting power source. It provides superior and reli-
able starting characteristics, cutting visibility and arc stabili-
ty. When cutting expanded metal, the Pro-Cut 55 out per-
forms the competition due to its quick, clean response to arc
transfers. The power supply design provides high transfer-
to-cut distances which makes pierce cutting more reliable
and with less nozzle wear. The control system has a safety
mechanism to insure that the nozzle and electrode are in
place before cutting or gouging. This is extremely important
due to the high voltages involved.
The Pro-Cut 55 comes standard with an air regulator,
coarse air filter, and pressure gauge. There are six different
torch and cable systems to choose from: hand-held torch
with 25' or 50' cable, machine and robotic torch both with 25'
and 50' cable. Consumables are included so that cutting can
begin right out of the box. Consumables can also be
ordered as individual packages.
The Pro-Cut 55 initiates the plasma arc with a simple, yet
reliable, touch start mechanism. This system eliminates
many of the failure problems associated with hi-frequency
start systems. The Pro-Cut 55 is capable of cutting with
nitrogen or air.
The Pro-Cut 55 is controlled by a microprocessor-based
control board. The machine performs rudimentary self trou-
bleshooting when powered up which aids in field servicing.
PREHEAT TEMPERATURE FOR
PLASMA CUTTING
Preheat temperature control is not necessary in most appli-
cations when plasma arc cutting or gouging. Preheat tem-
perature control may be necessary on high carbon alloy
steels and heat treated aluminum for crack resistance and
hardness control. Job conditions, prevailing codes, alloy
level, and other considerations may also require preheat
temperature control. The following minimum preheat tem-
perature is recommended as a starting point. Higher tem-
peratures may be used as required by the job conditions
and/or prevailing codes. If cracking or excessive hardness
occurs on the cut face, higher preheat temperature may be
required. The recommended minimum preheat temperature
for plate thickness up to 1/2" (12.7mm) is 70°F (21.1°C).
ELECTRIC SHOCK
can kill.
• Do not touch electrically live parts
or electrode with skin or wet
clothing.
• Insulate yourself from work and
ground.
• Always wear dry insulating
gloves.
FUMES AND GASES
can be dangerous.
• Keep your head out of fumes.
• Use ventilation or exhaust to
remove fumes from breathing
zone.
WELDING, CUTTING and
GOUGING SPARKS
can cause fire or explosion
• Keep flammable material away.
• Do not weld, cut or gouge on contain-
ers that have held combustibles.
Observe additional Safety Guidelines detailed in
the beginning of this manual.
WARNING
ARC RAYS
can burn.
• Wear eye, ear and body
protection.
PLASMA ARC
can injure
• Keep your body away from nozzle
and plasma arc.
• Operate the pilot arc with caution. The
pilot arc is capable of burning the
operator, others or even piercing
safety clothing.