Lincoln Electric PRO-CUT 10474, PRO-CUT 10473, PRO-CUT 10476, PRO-CUT 10475 User Manual

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PRO-CUT

For use with machines having Code Numbers:

Safety Depends on You

Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However, your
overall safety can be increased by
proper installation ... and thought­ful operation on your part. DO

NOT INSTALL, OPERATE OR
REPAIR THIS EQUIPMENT
WITHOUT READING THIS
MANUAL AND THE SAFETY
PRECAUTIONS CONTAINED
THROUGHOUT. And, most

importantly, think before you act
and be careful.

TM

55

10473, 10474, 10475 and 10476

December, 2002

Date of Purchase:
Serial Number:
Code Number:
Model:
Where Purchased:

Cleveland, Ohio 44117-1199 U.S.A. TEL: [phone] FAX: [phone] WEB SITE: www.lincolnelectric.com

OPERATOR’S MANUAL

• World's Leader in Welding and Cutting Products •

• Sales and Service through Subsidiaries and Distributors Worldwide •

i

SAFETY

i

WARNING

PLASMA CUTTING or GOUGING can be hazardous.

PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN
AWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING.

Read and understand the following safety highlights. For additional safety information it is strongly recommended that you pur­chase a copy of “Safety in Welding & Cutting - ANSI Standard Z49.1” from the American Welding Society, P.O. Box 351040,
Miami, Florida 33135 or CSA Standard W117.2.

BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE, AND REPAIR PROCEDURES ARE
PERFORMED ONLY BY QUALIFIED INDIVIDUALS.

ELECTRIC SHOCK can
kill.

1.a. The electrode and work (or ground) circuits
are electrically “hot” when the power source is on.
Do not touch these “hot” parts with your bare skin
or wet clothing. Wear dry, hole-free gloves to
insulate hands.

1.b. When the power source is operating voltages in excess of
250 volts are produced. This creates the potential for serious
electrical shock - potentially even fatal.

1.c. Insulate yourself from work and ground using dry insulation.
When cutting or gouging in damp locations, on metal frame­work such as floors, gratings or scaffolds and when in posi­tions such as sitting or lying, make certain the insulation is
large enough to cover your full area of physical contact with
work and ground.

1.d. Always be sure the work cable makes a good electrical con­nection with the metal being cut or gouged. The connection
should be as close as possible to the area being cut or
gouged.

1.e. Ground the work or metal to be cut or gouged to a good elec­trical (earth) ground.

1.f. Maintain the plasma torch, cable and work clamp in good,
safe operating condition. Replace damaged insulation.

1.g. Never dip the torch in water for cooling or plasma cut or
gouge in or under water.

1.h. When working above floor level, protect yourself from a fall
should you get a shock.

1.i. Operate the pilot arc with caution. The pilot arc is capable of
burning the operator, others or even piercing safety clothing.

1.j. Also see Items 4c and 6.

ARC RAYS can burn.

2.a. Use safety glasses and a shield with the prop­er filter and cover plates to protect your eyes from
sparks and the rays of the arc when performing or
observing plasma arc cutting or gouging.
Glasses,headshield and filter lens should conform
to ANSI Z87. I standards.

2.b. Use suitable clothing including gloves made from durable
flame-resistant material to protect your skin and that of your
helpers from the arc rays.

2.c. Protect other nearby personnel with suitable non-flammable
screening and/or warn them not to watch the arc nor expose
themselves to the arc rays or to hot spatter or metal.

to keep fumes and gases away from the breathing zone.

When cutting or gouging on lead or cadmium plated
steel and other metals or coatings which produce highly
toxic fumes keep exposure as low as possible and
below Threshold Limit Values (TLV) using local exhaust
or mechanical ventilation. In confined spaces or in some
circumstances, outdoors, a respirator may be required.
Additional precautions are also required when welding
on galvanized steel.

3.b. Do not use plasma arc cutting or gouging in locations near
chlorinated hydrocarbon vapors coming from degreasing,
cleaning or spraying operations. The heat and rays of the arc
can react with solvent vapors to form phosgene, a highly
toxic gas, and other irritating products.

3.c. Gases used for plasma cutting and gouging can displace air
and cause injury or death. Always use enough ventilation,
especially in confined areas, to insure breathing air is safe.

3.d. Read and understand the manufacturer’s instructions for this
equipment and the consumables to be used, including the
material safety data sheet (MSDS) and follow your employ­er’s safety practices.

sparks and hot materials from plasma cutting or gouging can
easily go through small cracks and openings to adjacent
areas. Avoid cutting or gouging near hydraulic lines. Have a
fire extinguisher readily available.

4.b. Where compressed gases are to be used at the job site, spe­cial precautions should be used to prevent hazardous situa­tions. Refer to “Safety in Welding and Cutting” (ANSI
Standard Z49.1) and the operating information for the equip­ment being used.

4.c. When not cutting or gouging, make certain no part of the elec­trode circuit is touching the work or ground. Accidental con­tact can cause overheating and create a fire hazard.

4.d. Do not cut or gouge tanks, drums or containers until the prop­er steps have been taken to insure that such procedures will
not cause flammable or toxic vapors from substances inside.
They can cause an explosion even though they have been
“cleaned.” For information purchase “Recommended Safe
Practices for the Preparation for Welding and Cutting of
Containers and Piping That Have Held Hazardous
Substances”, AWS F4.1 from the American Welding Society
(see address above).

4.e. Vent hollow castings or containers before heating, cutting or
gouging. They may explode.

4.f. Do nor fuel engine driven equipment near area where plasma
cutting or gouging.

FUMES AND GASES
can be dangerous.

3.a. Plasma cutting or gouging may produce
fumes and gases hazardous to health. Avoid
breathing these fumes and gases.When cutting
or gouging, keep your head out of the fumes.
Use enough ventilation and/or exhaust at the arc

CUTTING SPARKS can
cause fire or explosion.

4.a..Remove fire hazards from the plasma cut­ting or gouging area. If this is not possible, cover
them to prevent the cutting or gouging sparks
from starting a fire. Remember that welding

Apr. ‘93

ii

SAFETY

ii

4.g. Sparks and spatter are thrown from the plasma arc. Wear
safety glasses, ear protection and oil free protective garments
such as leather gloves, heavy shirt, cuffless trousers, high
shoes and a cap over your hair. Wear ear plugs when cutting
or gouging out of position or in confined places. Always wear
safety glasses with side shields when in a cutting or gouging
area.

4.h. Connect the work cable to the work as close to the cutting or
gouging area as practical. Work cables connected to the build­ing framework or other locations away from the cutting or
gouging area increase the possibility of the current passing
through lifting chains, crane cables or other alternate circuits.
This can create fire hazards or overheat lifting chains or
cables until they fail.

CYLINDER may explode
if damaged.

5.a. Use only compressed gas cylinders contain­ing the correct gas for the process used and
properly operating regulators designed for the

gas and pressure used. All hoses, fittings, etc.
should be suitable for the application and maintained in good
condition.

5.b. Always keep cylinders in an upright position securely
chained to an undercarriage or fixed support.

5.c. Cylinders should be located:

• Away from areas where they may be struck or subjected to

physical damage.

• A safe distance from plasma cutting or gouging, arc weld-

ing operations and any other source of heat, sparks,
or flame.

5.d. Never allow any part of the electrode, torch or any other
electrically “hot” parts to touch a cylinder.

5.e. Keep your head and face away from the cylinder valve outlet
when opening the cylinder valve.

5.f. Valve protection caps should always be in place and hand
tight except when the cylinder is in use or connected for
use.

5.g. Read and follow the instructions on compressed gas cylin­ders, associated equipment, and CGA publication P-l,
“Precautions for Safe Handling of Compressed Gases in
Cylinders,”available from the Compressed Gas Association
1235 Jefferson Davis Highway, Arlington, VA 22202.

FOR ELECTRICALLY
powered equipment.

6.a. Turn off input power using the disconnect
switch at the fuse box before working on the
equipment.

6.b. Install equipment in accordance with the U.S. National
Electrical Code, all local codes and the manufacturer’s rec­ommendations.

6.c. Ground the equipment in accordance with the U.S. National
Electrical Code and the manufacturer’s recommendations.

PLASMA ARC can injure.

7.a. Keep your body away from nozzle and
plasma arc.

7.b. Operate the pilot arc with caution. The pilot arc is capable of
burning the operator, others or even piercing safety clothing.

ELECTRIC AND MAGNETIC FIELDS

may be dangerous

8.a. Electric current flowing through any con­ductor causes localized Electric and Magnetic
Fields (EMF). Cutting or gouging current cre­ates EMF fields around torch cables and cutting
machines.

8.b. EMF fields may interfere with some pacemakers, so opera­tors having a pacemaker should consult their physician
before cutting or gouging.

8.c. Exposure to EMF fields during cutting or gouging may have
other health effects which are now not known.

8d. All operators should use the following procedures in order to

minimize exposure to EMF fields from the cutting or gouging
circuit:

8.d.1. Route the torch and work cables together - Secure
them with tape when possible.

8.d.2. Never coil the torch cable around your body.

8.d.3. Do not place your body between the torch and
work cables. If the torch cable is on your right side,
the work cable should also be on your right side.

8.d.4. Connect the work cable to the workpiece as close as
possible to the area being cut or gouged.

8.d.5. Do not work next to cutting power source.

Apr. ‘93

iii

NOTES

iii

iv

SAFETY

iv

PRÉCAUTIONS DE SÛRETÉ

Pour votre propre protection lire et observer toutes les instructions
et les précautions de sûreté specifiques qui parraissent dans ce
manuel aussi bien que les précautions de sûreté générales suiv­antes:

Sûreté Pour Soudage A L’Arc

1. Protegez-vous contre la secousse électrique:

a. Les circuits à l’électrode et à la piéce sont sous tension

quand la machine à souder est en marche. Eviter toujours
tout contact entre les parties sous tension et la peau nue
ou les vétements mouillés. Porter des gants secs et sans
trous pour isoler les mains.

b. Faire trés attention de bien s’isoler de la masse quand on

soude dans des endroits humides, ou sur un plancher
metallique ou des grilles metalliques, principalement dans
les positions assis ou couché pour lesquelles une grande
partie du corps peut être en contact avec la masse.

c. Maintenir le porte-électrode, la pince de masse, le câble

de soudage et la machine à souder en bon et sûr état
defonctionnement.

d.Ne jamais plonger le porte-électrode dans l’eau pour le

refroidir.

e. Ne jamais toucher simultanément les parties sous tension

des porte-électrodes connectés à deux machines à souder
parce que la tension entre les deux pinces peut être le
total de la tension à vide des deux machines.

f. Si on utilise la machine à souder comme une source de

courant pour soudage semi-automatique, ces precautions
pour le porte-électrode s’applicuent aussi au pistolet de
soudage.

2. Dans le cas de travail au dessus du niveau du sol, se protéger
contre les chutes dans le cas ou on recoit un choc. Ne jamais
enrouler le câble-électrode autour de n’importe quelle partie
du corps.

5. Toujours porter des lunettes de sécurité dans la zone de
soudage. Utiliser des lunettes avec écrans lateraux dans les
zones où l’on pique le laitier.

6. Eloigner les matériaux inflammables ou les recouvrir afin de
prévenir tout risque d’incendie dû aux étincelles.

7. Quand on ne soude pas, poser la pince à une endroit isolé de
la masse. Un court-circuit accidental peut provoquer un
échauffement et un risque d’incendie.

8. S’assurer que la masse est connectée le plus prés possible
de la zone de travail qu’il est pratique de le faire. Si on place
la masse sur la charpente de la construction ou d’autres
endroits éloignés de la zone de travail, on augmente le risque
de voir passer le courant de soudage par les chaines de lev­age, câbles de grue, ou autres circuits. Cela peut provoquer
des risques d’incendie ou d’echauffement des chaines et des
câbles jusqu’à ce qu’ils se rompent.

9. Assurer une ventilation suffisante dans la zone de soudage.
Ceci est particuliérement important pour le soudage de tôles
galvanisées plombées, ou cadmiées ou tout autre métal qui
produit des fumeés toxiques.

10. Ne pas souder en présence de vapeurs de chlore provenant
d’opérations de dégraissage, nettoyage ou pistolage. La
chaleur ou les rayons de l’arc peuvent réagir avec les vapeurs
du solvant pour produire du phosgéne (gas fortement toxique)
ou autres produits irritants.

11. Pour obtenir de plus amples renseignements sur la sûreté,
voir le code “Code for safety in welding and cutting” CSA
Standard W 117.2-1974.

PRÉCAUTIONS DE SÛRETÉ POUR

3. Un coup d’arc peut être plus sévère qu’un coup de soliel,
donc:

a. Utiliser un bon masque avec un verre filtrant approprié

ainsi qu’un verre blanc afin de se protéger les yeux du ray­onnement de l’arc et des projections quand on soude ou
quand on regarde l’arc.

b. Porter des vêtements convenables afin de protéger la

peau de soudeur et des aides contre le rayonnement de
l‘arc.

c. Protéger l’autre personnel travaillant à proximité au

soudage à l’aide d’écrans appropriés et non-inflammables.

4. Des gouttes de laitier en fusion sont émises de l’arc de
soudage. Se protéger avec des vêtements de protection libres
de l’huile, tels que les gants en cuir, chemise épaisse, pan­talons sans revers, et chaussures montantes.

LES MACHINES À SOUDER À
TRANSFORMATEUR ET À
REDRESSEUR

1. Relier à la terre le chassis du poste conformement au code de
l’électricité et aux recommendations du fabricant. Le dispositif
de montage ou la piece à souder doit être branché à une
bonne mise à la terre.

2. Autant que possible, I’installation et l’entretien du poste seront
effectués par un électricien qualifié.

3. Avant de faires des travaux à l’interieur de poste, la debranch­er à l’interrupteur à la boite de fusibles.

4. Garder tous les couvercles et dispositifs de sûreté à leur
place.

Mar. ‘93

for selecting a QUALITY product by Lincoln Electric. We want you

Thank You

to take pride in operating this Lincoln Electric Company product

••• as much pride as we have in bringing this product to you!

Please Examine Carton and Equipment For Damage Immediately

When this equipment is shipped, title passes to the purchaser upon receipt by the carrier. Consequently, Claims
for material damaged in shipment must be made by the purchaser against the transportation company at the
time the shipment is received.

Please record your equipment identification information below for future reference. This information can be
found on your machine nameplate.

Model Name & Number _____________________________________

Code & Serial Number _____________________________________

Date of Purchase _____________________________________

Whenever you request replacement parts for or information on this equipment always supply the information
you have recorded above.

vv

Read this Operators Manual completely before attempting to use this equipment. Save this manual and keep it

handy for quick reference. Pay particular attention to the safety instructions we have provided for your protection.
The level of seriousness to be applied to each is explained below:

WARNING

This statement appears where the information must be followed exactly to avoid serious personal injury or
loss of life.

CAUTION

This statement appears where the information must be followed to avoid minor personal injury or damage to
this equipment.

TABLE OF CONTENTS

Page

Installation.......................................................................................................................Section A

Technical Specifications.......................................................................................................A-1

Safety Precautions ...............................................................................................................A-2

Select Proper Location .........................................................................................................A-2

Stacking................................................................................................................................A-2

Lifting and Moving ................................................................................................................A-2

Tilting....................................................................................................................................A-2

High Frequency Interference Protection...............................................................................A-2

Input Electrical Connections.................................................................................................A-3

Input Power Cord Connector Installation..............................................................................A-3

Frame Grounding .................................................................................................................A-3

Gas Input Connections.........................................................................................................A-4

Output Connections..............................................................................................................A-4

Torch Connection..........................................................................................................A-4

Operation.........................................................................................................................Section B

Safety Precautions ...............................................................................................................B-1

Description ...........................................................................................................................B-1

Preheat Temperature for Plasma Cutting.............................................................................B-1

User Responsibility...............................................................................................................B-2

Recommended Processes and Equipment ..........................................................................B-2

Operational Features and Controls ......................................................................................B-2

Design Features and Advantages ........................................................................................B-2

Cutting Capability .................................................................................................................B-3

Consumable Life ..................................................................................................................B-3

Limitations ............................................................................................................................B-4

Controls and Settings ...........................................................................................................B-4

Pilot Arc Discussion..............................................................................................................B-6

Procedure Recommendations..............................................................................................B-6

General .........................................................................................................................B-6

Thin Gauge Sheet Metal ...............................................................................................B-6

Thick Sections of Metal .................................................................................................B-6

Suggestions for Extra Utility from the PRO-CUT System .............................................B-7

vi

Accessories.....................................................................................................Section C

Genuine Lincoln Parts ...........................................................................................C-1

General Options / Accessories..............................................................................C-1

vii

TABLE OF CONTENTS

Page

Maintenance ....................................................................................................Section D

Safety Precautions ................................................................................................D-1

Input Filter Capacitor Discharge Procedure ..........................................................D-1

Routine Maintenance.............................................................................................D-2

Periodic Maintenance............................................................................................D-2

Troubleshooting..............................................................................................Section E

Safety Precautions.................................................................................................E-1

How to Use Troubleshooting Guide.......................................................................E-1

Troubleshooting Guide ..........................................................................................E-2

Wiring Diagrams..............................................................................................Section F

Wiring Diagram ......................................................................................................F-1

Dimension Print......................................................................................................F-2

Parts List .....................................................................................P309 Series & P210-K

A-1

INSTALLATION

TECHNICAL SPECIFICATIONS - PRO-CUT 55

INPUT - SINGLE or THREE PHASE / 60 HERTZ ONLY

Standard Voltage

1Ø Input Current at Rated Output

A-1

3Ø Input Current at Rated Output

230/460/1 or 3Ø/60 Hz 230V: 55A @ 50%, 40A @ 100%

460V: 30A @ 50%, 23A @ 100%

Idle Current: 0.42 Amps, Idle Power 98 Watts

@ 230V

RATED OUTPUT

Duty Cycle

50% Duty Cycle

100% Duty Cycle

AMPS

55
40

OUTPUT

Current

Range

25-55 Amps

Open Circuit

Voltage

MAX

335 VDC

230V: 28A @ 50%, 21A @ 100%
460V: 17A @ 50%, 15A @ 100%

Pilot Current

18 Amps @ 100% Duty Cycle

AC Input
Voltage at
60 Hertz

1Ø - 230
1Ø - 460

3Ø - 230
3Ø - 460

REQUIRED GAS FLOW RATE REQUIRED GAS INLET PRESSURE

70 PSI @ 360 SCFH

( 4.8 Bar. @ 10160 LHR)

80 to 150 PSI

( 5.4 Bar. TO 10.2 Bar.)

RECOMMEND INPUT WIRE AND FUSE SIZES

For all plasma cutting applications

Based on U.S. National Electrical Code

Ambient Temperature 30oC or Less

Fuse

(Super Lag)

Type 75
Copper Wire in Conduit AWG (IEC) Sizes

o

C

Circuit Breaker

(Delay Type)

Ground Wire

#10 (5.3mm
#10 (5.3mm

#10 (5.3mm2)
#10 (5.3mm2)

2

)

2

)

70 AMPS
40 AMPS

40 AMPS
20 AMPS

Input Supply Wire

2

#8 (8.4mm
#8 (8.4mm

)

2

)

#10 (5.3mm2)
#10 (5.3mm2)

PHYSICAL DIMENSIONS

Weight

Height

12.6 in.

320 mm

idth

W

11.0 in.

280 mm

Depth

26.0 in.

660 mm

Including Machine

Torch Cable (Length)

(25ft/7.6m) (50ft/15.2m)

70 lbs. 85 lbs.

32 kg. 39 kg.

A-2

INSTALLATION

A-2

Read entire Installation Section before installing the
PRO-CUT 55.

SAFETY PRECAUTIONS

WARNING

ELECTRIC SHOCK CAN KILL.

• Only qualified personnel
should install this machine.

• Turn the input power OFF
at the disconnect switch or
fuse box and discharge input
capacitors before working
inside the equipment.

• Do not touch electrically hot parts.

• Always connect the PRO-CUT 55 ground­ing terminal (located on the side of the
Case Back Assembly) to a good electrical
earth ground.

• Turn the PRO-CUT Power Switch OFF
when connecting power cord to input
power.

___________________________________________

LIFTING AND MOVING

Either the front or rear handles or both may be used to
lift or move the machine.

NOT use the pull handle on the optional undercar-

DO

riage, if installed, to lift the machine. This handle is not
designed to support the full weight of the machine and
using it to lift the machine could cause personal injury
or damage to the machine.

TILTING

The PRO-CUT 55 must be placed on a stable, level
surface so it will not topple over.

HIGH FREQUENCY INTERFERENCE
PROTECTION

The Pro-Cut 55 employs a touch start mechanism for
arc initiation which eliminates high frequency emis­sions from the machine as compared with spark gap
and solid state type high frequency generators. Keep
in mind, though, that these machines may be used in
an environment where other high frequency generat­ing machines are operating. By taking the following
steps, high frequency interference into the Pro-Cut
can be minimized

SELECT PROPER LOCATION

Place the Pro-Cut 55 where clean cool air can freely
circulate in through the rear louvers and out through
the front/bottom opening. Dirt, dust or any foreign
material that can be drawn into the machine should be
kept at a minimum. Failure to observe these precau­tions can result in excessive operating temperatures
and nuisance shutdown of the machine.

A source of clean, dry air or nitrogen must be supplied
to the Pro-Cut 55. Oil in the air is a severe problem
and must be avoided. The supply pressure must be
between 80 and 150 psi. The flow rate is approximate­ly 6.0 cfm (170 l/min.). Failure to observe these pre­cautions could result in excessive operating tempera­tures or damage to the torch.

STACKING

The PRO-CUT 55 cannot be stacked.

(1) Make sure the power supply chassis is connected

to a good earth ground. The work terminal ground
does NOT ground the machine frame.

(2) Keep the work ground clamp isolated from other

work clamps that have high frequency.

(3) If the ground clamp cannot be isolated, then keep

the clamp as far as possible from other work
clamp connections.

(4) When the machine is enclosed in a metal building,

several good earth driven electrical grounds
around the periphery of the building are recom­mended.

Failure to observe these recommended installation
procedures may cause improper function of the Pro­Cut or possibly even damage to the control system or
power supply components.

PRO-CUT 55

A-3

INSTALLATION

A-3

INPUT ELECTRICAL
CONNECTIONS

Before installing the machine, check that input supply
voltage, phase, and frequency are the same as the
machine's voltage, phase, and frequency as specified
on the machine's rating plate.

a. The Pro-Cut 55 should be connected only by a

qualified electrician. Installation should be made in
accordance with the U.S. National Electrical Code,
all local codes and the information detailed below.

b. When received directly from the factory, the

machines are internally connected for 230 VAC.
Re-connection will be necessary if a higher input
voltage is used. To reconnect the Pro-Cut to 460
VAC or to connect back to 230 VAC, follow the
directions as outlined below. Follow this procedure
ONLY while the Pro-Cut is disconnected from the
input power and the capacitors have properly dis­charged.

1. Open the access door on the side of the

machine.

INPUT POWER CORD CONNECTOR
INSTALLATION

The Pro-Cut 55 is supplied with one 11' #8 AWG 3
lead input power cord already connected to the
machine. A cord connector provides a strain relief for
the input power cord as it passes through the left rear
access hole. The cord connector is designed for a
cord diameter of .40 - 1.03 in (10.2 - 26.2mm) if it
becomes necessary to install a different input cord.

For three phase connection: Replace input power cord
with a #10 AWG 4 lead cable.

1. Connect leads of input power cord to a fused
power panel. Make sure the green lead is con­nected to the panel and the panel is connected to
a good earth ground.

Install in accordance with all local and national electric
codes.

FRAME GROUNDING

2. For 200 to 230 : Position the large switch
to 200-230.
For 400 to 460 : Position the large switch
to 400-460.

3. Move the "A" lead to the appropriate termi­nal.

The frame of the Pro-Cut 55 must be properly ground­ed. A ground terminal is mounted on the case bottom
directly behind the input power switch for this purpose.
The cable that is sent attached to the machine is con­nected to this ground terminal. See the National
Electric Code for details on proper grounding meth­ods. Install in accordance with all local and national
electrical codes.

PRO-CUT 55

A-4

INSTALLATION

A-4

GAS INPUT CONNECTIONS

Supply the PRO-CUT 55 with clean compressed air or
nitrogen.

• Supply pressure must be between 80 psi
and 150 psi.

• Flow rate should be approximately 6.0
cfm (170 I/min.).

NOTE: Oil in the air supply to the PRO-CUT 55 can

cause severe problems. Use only a clean air
supply.

• Connect the gas supply to the PRO-CUT 55
regulator.

• Compressed gas should be supplied to the fit­ting connection mounted on the filter at the
rear of the machine. If necessary, this fitting
can be removed allowing plumbing access
through the 1/4” NPT input port on the filter
body.

• If compressed air is being used, it is highly recom­mended that an inline prefilter be installed in the air
supply line ahead of the air connection to the PRO­CUT’s coalescing filter. While the coalescing filter is
used to remove small amounts of oil and water
aerosol particles from the air supply line, the prefilter
can be used to remove larger particulates before
they reach the coalescing filter element.This will pro­long the life of the coalescing filter element by up to
six times what it would be without the prefilter, and in
turn, prolong the life of the PRO-CUT torch and con­sumables as well.

• A standard nominal 5 micron inline prefilter is recom­mended; however, for optimum performance, select
a prefilter with a 3 micron absolute rating. If these fil­ter ratings are unavailable, anything with a rating
less than, or equal to, 20 micron would be accept­able to use. In line filter elements will generally filter
the air with little restriction to the airflow until the ele­ment is about 75 % contaminated. After this point,
there will be a noticeable pressure drop in the line.
Filter elements should be replaced when a pressure
drop of 8-10 psi is indicated; however, for optimum
performance of the PRO-CUT, the filter element
should be replaced at or before the pressure drop
reaches 8 psi. Be sure to select a prefilter that will
accommodate the necessary flow rating for the
PRO-CUT as specified in the Installation section of
this instruction manual under the Gas Input
Connections heading.

• While it is recommended that an in line prefilter be
placed ahead of each PRO-CUT that may be
installed in a shared air supply line, one large inline
prefilter may be used to accommodate several PRO­CUTs simultaneously. If a shared prefilter is desired,
it must be rated to provide the necessary flow rate,
as specified, to ensure proper operation of each of
the PRO-CUTs sharing a connection.

NOTE: When using nitrogen gas from a cylinder, the

cylinder must have a pressure regulator.

• Maximum psi from nitrogen gas cylinder to
PRO-CUT 55 regulator should never
exceed 150 psi.

• Install a hose between the nitrogen gas
cylinder regulator and the PRO-CUT 55
gas inlet.

WARNING

CYLINDER could explode if damaged.

• Keep cylinder upright and chained to a
fixed support.

• Keep cylinder away from areas where it
could be damaged.

• Never lift machine with cylinder attached.

• Never allow the cutting torch to touch the
cylinder.

• Keep cylinder away from live electrical
parts.

• Maximum inlet pressure 150 psi.

__________________

OUTPUT CONNECTIONS

Torch Connection

The Pro-Cut 55 is sent from the factory with a PCT 80
cutting torch. Additional cutting torches can be
ordered from the K1571 series. Hand-held and mech­anized torches come with 25' or 50’ cables.

All torches are connected to the Pro-Cut with a quick
connect at the bulkhead for easy change over. This
feature is excellent for changing between a hand cut­ting torch and a mechanized torch. This feature is also
handy for troubleshooting.

For more information on the torch and its components,
refer to the PCT80 Operator’s Manual (IM588 latest
version).

PRO-CUT 55

B-1

OPERATION

B-1

Read and understand this entire section before oper­ating the machine.

SAFETY PRECAUTIONS

WARNING

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.

DESCRIPTION

The Pro-Cut 55 is a constant current, continuous con­trol plasma cutting power source. It provides superior
and reliable starting characteristics, cutting visibility
and arc stability. When cutting expanded metal, the
Pro-Cut 55 out performs 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. The machine
also comes with an 11' input power cord. There are
four 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 with each Pro-Cut pur­chase so that cutting can begin right out of the box.
Consumables can also be ordered as individual pack­ages. An undercarriage kit can also be ordered sepa­rately.

WELDING, CUTTING and
GOUGING SPARKS
can cause fire or explosion

• Keep flammable material away.

• Do not weld, cut or gouge on
containers that have held combustibles.

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.

Observe additional Safety Guidelines detailed in
the beginning of this manual.

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 hi­frequency start systems. The Pro-Cut 55 is capable of
cutting with nitrogen or air. Nitrogen is used to cut alu­minum and other nonferrous metals.

The Pro-Cut 55 is controlled by a microprocessor­based control board. The machine performs rudimen­tary self troubleshooting when powered up which aids
in field servicing.

PREHEAT TEMPERATURE FOR
PLASMA CUTTING

Preheat temperature control is not necessary in most
applications when plasma arc cutting or gouging.
Preheat temperature 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 temperature is recommended as a
starting point. Higher temperatures 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).

PRO-CUT 55

B-2

OPERATION

B-2

USER RESPONSIBILITY

Because design, fabrication, erection and cutting vari­ables affect the results obtained in applying this type
of information, the serviceability of a product or struc­ture is the responsibility of the user. Variation such as
plate chemistry, plate surface condition (oil, scale),
plate thickness, preheat, quench, gas type, gas flow
rate and equipment may produce results different than
those expected. Some adjustments to procedures
may be necessary to compensate for unique individ­ual conditions. Test all procedures duplicating actual
field conditions.

RECOMMENDED PROCESSES AND
EQUIPMENT

The PRO-CUT 55 is capable of all cutting and goug­ing applications within its output capacity of 25 to 55
amps. These applications include thin gage sheet
metal and expanded metal.

OPERATIONAL FEATURES AND
CONTROLS

The PRO-CUT 55 comes with an ON/OFF POWER
SWITCH, OUTPUT CURRENT CONTROL, PURGE
BUTTON and a SAFETY RESET BUTTON.

- Input over voltage protection.

- Bright 3.0 second timed pilot arc.

- Purge momentary push button.

- Air regulator and pressure gage located on the front
of machine for convenience.

- Parts-in-Place mechanism to detect proper installa­tion of consumables and torch.

- Latching Parts-in-Place mechanism. Requires a
positive operator reset.

- Automatic detection of faulty output control.

- In line coarse air filter.

- Preflow/Postflow timing. Preflow is eliminated if arc
is re-initiated in Postflow.

- Thermostatic Protection.

- Solid state over-current protection.

- Works with pure nitrogen for cutting nonferrous
materials.

- Reconnectable for 230 VAC or 460 VAC inputs.

DESIGN FEATURES AND
ADVANTAGES

The microprocessor controlled PRO-CUT 55 design
makes plasma cutting and gouging tasks uncomplicat­ed. This list of design features and advantages will
help you understand the machine's total capabilities
so that you can get maximum use from your machine.

- Light weight and portable design for industrial use.

- Continuous control, 25 - 55 amps.

- Reliable touch start mechanism for plasma arc initi­ation.

- Unique microprocessor controlled starting sequence
for safe and consistent starting.

- Rapid arc transfer for fast cutting of expanded
metal.

- High transfer distance for ease of use.

- Quick disconnect torch.

- Dead front display for machine status.

- Unique electrode and Vortech™ nozzle design for
optimum cooling and long life.

- Swirl texture inside Vortech™ nozzle for better start­ing reliability and higher quality cuts.

- Unique drag cup design for durability and elimina­tion of double arcing.

- Soft start of input filter capacitors at start up.

PRO-CUT 55

B-3

OPERATION

B-3

CUTTING CAPABILITY

The PRO-CUT 55 is rated at 55 amps, at 50% duty cycle on a 10 minute basis or 40 amps, at 100% duty cycle.
If the duty cycle is exceeded, a thermal protector will shut off the output of the machine until it cools to the normal
operating temperature.

Figure B.1 shows the cut capacity of the Pro-Cut 55 when cutting mild steel. The graph plots cut thickness vs.
torch travel speed with a torch standoff of 0.15". Example: 0.25” material may be cut at a setting of 35 amps at an
approximate speed of 38 IPM or at a setting of 45 amps at an approximate speed of 57 IPM or at a setting of 55
amps at an approximate speed of 62 IPM.

Lincoln's PRO-CUT 55

Mild Steel Cut Capacity Chart

100

80

60

40

80% of Maximum Speed

20

Recommended Torch Travel Speed (IPM)

0

0.000 0.125 0.250

25 A

35 A

0.375 0.500 0.625 0.750

Material Thickness

45 A

55 A

Figure B.1

CONSUMABLE LIFE

The expected life for the Pro-Cut 55's electrode under normal operating conditions is approximately 320
starts/cuts. An erosion of .060" is typical for end of electrode life, however, the electrode life may last longer. A
green and erratic arc will indicate definite electrode failure and the electrode should be replaced immediately.

It is recommended that consumables be replaced in complete sets. (Example: Electrode and Nozzle). This will
maximize the performance of the PRO-CUT system.

PRO-CUT 55

B-4

OFF

XXXX

XXXX

XXXX

XXXX

30

0

VER

TICAL ANGLE

FOR CUTTING

OPERATION

B-4

LIMITATIONS

Do not exceed output current and duty cycle rating of
machine. Do not use the PRO-CUT 55 for pipe thaw­ing.

CONTROLS AND SETTINGS

Status
Board
Indicators

Output
Control
Knob

Consumable
Storage
(behind
door)

Torch
Connector

Reset
Button

XXXX

Work
Cable

XXXX

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.

Gas
Purge
Button

XXXX

XXXX

PRO-CUT 55

OFF

Gas
Regulator
Gauge

Gas
Regulator
Knob

Input
Power
Switch

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’ torch­es 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 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 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 dam­age to the consumables will result.

• 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" but­ton. 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 work­piece before cutting.

• Set the output current control knob at maximum
position for high cutting speed and less dross forma­tion. Reduce the current, if desired to reduce the

PRO-CUT 55

• Pierce the work piece by slowly lowering the torch
onto the metal at a 30

0

angle away from the opera­tor. This will blow the dross away from the torch tip.
Slowly rotate the torch to vertical position as the arc
becomes deeper.

TORCH AT 300ANGLE

0

30

0

90

VER
FOR CUTTING

CUT

TO PIERCE

ROTATE TO

0

ANGLE TO CUT

90

TICAL ANGLE

B-5

OPERATION

B-5

• Hold the nozzle standoff 1/8” (3.2mm) to 3/16”
(4.7mm) above the workpiece during cutting. Do not
let the torch nozzle touch the work or carry a long
arc.

• 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.

Leading Angle

5° - 15°

Direction of Travel

10° - 20°

Arc Lag

• Use a 5° - 15° leading angle in the direction of the
cut.

ANGLE

OF APPROACH

TORCH HELD AT

0

ANGLE

45

THROUGHOUT GOUGE

ANGLE

MAINTAINED

THROUGHOUT

GOUGE

• If the "SAFETY" LED lights at any time, check the
following:

• Check the assembly of the torch consumables. If

WARNING

ELECTRIC SHOCK CAN KILL.

• Turn off machine at the disconnect
switch on the front of the machine
before tightening, cleaning or replacing
consumables.

----------------------------------------------------------------------------

• Use the drag cup to maintain constant standoff for
better cut quality and to protect the nozzle from spat­ter.

• Use the drag cup with a metal template to prevent
nozzle double arcing.

• Finish the cut to be made and release the trigger.

• When the trigger is released, the arc will stop.

- The gas will continue to flow for 10 seconds of
postflow. If the trigger is activated within this time
period, the pilot arc will immediately restart.

• If the dross is difficult to remove, reduce the cutting
speed. High speed dross is more difficult to remove
than low speed dross.

• The right side of the cut is more square than the left
as viewed along the direction of travel.

• Tilt the torch about 45° from the workpiece and hold
the nozzle 1/8” (3.2mm) to 3/16” (4.7mm) above the
workpiece for gouging.

they are not properly in place, the machine will not
start. Make sure that the shield cup is hand tight.

Do not use pliers or over tighten.

• Check the conditions of the inside of the nozzle. If
debris has collected, rub the electrode on the inside
bottom of the nozzle to remove any oxide layer that
may have built up. Refer to "Suggestions for Extra
Utility from the PRO-CUT system".

• Check the condition of the electrode. If the end has
a crater-like appearance, replace it along with the
nozzle. The maximum wear depth of the electrode is
approximately .062”. A green and erratic arc will
indicate definite electrode failure and the electrode
should be replaced immediately.

• Replace the nozzle when the orifice exit is eroded
away or oval shaped.

• After the problem is found, or if there is nothing
apparently wrong, reset the machine by pressing
the "Reset" button. (It is possible for electrical noise
to trip the safety circuit on rare occasions. This
should not be a regular occurrence.)

• Clean spatter and scale from the nozzle and drag
cup frequently.

PRO-CUT 55

• If the machine does not reset or continues to trip,
consult the Troubleshooting Section.

• Use the proper cutting or gouging procedures

referred to in Procedure Recommendations.

B-6

OPERATION

B-6

PILOT ARC DISCUSSION

The PRO-CUT has a smooth, continuous pilot arc.
The pilot arc is only a means of transferring the arc to
the workpiece for cutting. Repeated pilot arc starts, in
rapid succession, is not recommended as these starts
will generally reduce consumable life. Occasionally,
the pilot arc may sputter or start intermittently. This is
aggravated when the consumables are worn or the air
pressure is too high. Always keep in mind that the
pilot arc is designed to transfer the arc to the work­piece and not for numerous starts without cutting.

When the pilot arc is started, a slight impulse will be
felt in the torch handle. This occurrence is normal and
is the mechanism which starts the plasma arc. This
impulse can also be used to help troubleshoot a "no
start" condition.

PROCEDURE RECOMMENDATIONS

When properly used, plasma arc cutting or gouging is
a very economical process. Improper use will result in
a very high operating cost.

General - In All Cases

Thick Sections of Metal

Torch Standoff

1/8" thru 3/16"

Standoff

Output set above mid-range.

• The best quality and consumable life will be
obtained by holding the torch off the surface
about 3/16". Too long an arc may compromise
cut quality and consumable life. The nozzle
should NOT be dragged on the work.

• Use of the S22151 Drag Cup will maintain the
proper standoff. The only reason not to use the
Drag Cup when the output control is set above
mid-range is in special, tight corners. Always
hold at least a 1/8" standoff in those situations.

Machine Output Setting

Output Setting

Mid. thru Max. Range

• Follow safety precautions as printed throughout
this operating manual and on the machine.

Thin Gauge Sheet Metal:

Torch Standoff

DRAG thru 1/16"

Standoff

Output set below mid-range.

• The nozzle may be dragged on the metal sur­face, touching it lightly to the surface after pierc­ing a hole. Current control should be set below
the mid range.

Machine Output Setting

Output Setting

Min. thru Mid. Range

• If piercing is required, slowly lower the torch at
an angle of about 30° to blow the dross away
from the torch tip and slowly rotate the torch to
a vertical position as the arc becomes deeper.
This process will blow a lot of molten metal and
dross. Be careful! Blow the dross away from
the torch, the operator and any flammable
objects.

• Where possible, start the cut from the edge of
the work piece.

• Keep moving! A steady speed is necessary.
Do not pause.

• Do not allow torch cable or body to contact hot
surface.

• Do not allow cable or body to contact hot sur­face.

PRO-CUT 55

B-7

OPERATION

B-7

Suggestions for Extra Utility from the
PRO-CUT System:

WARNING

ELECTRIC SHOCK CAN KILL.

• Turn off machine at the disconnect
switch on the front of the machine
before tightening, cleaning or replacing
consumables.

----------------------------------------------------------------------------

1. Occasionally an oxide layer may form over the tip
of the electrode, creating an insulating barrier
between the electrode and nozzle. This will result
in the tripping of the Pro-Cut's safety circuit. When
this happens turn the power off, remove the nozzle
and electrode and use the electrode to rub against
the inside bottom surface of the nozzle. This will
help remove any oxide buildup. Replace the noz­zle, turn on the power and continue cutting. If the
Parts-in-Place circuit continues to trip after clean­ing the consumables, then replace them with a
new set. Do not continue to try and cut with exces­sively worn consumables as this can cause dam­age to the torch head and will degrade cut quality.

h. Set air pressure to recommended setting. A

higher or lower pressure will cause turbulence
in the plasma arc, eroding the orifice of the
nozzle tip.

i. Use only Lincoln consumable parts. These

parts are patented and using any other
replacement consumables may cause damage
to the torch or reduce cut quality.

2. To improve consumable life, here are some sug-

gestions that may be useful:

a. Never drag the nozzle on the work surface if

the output control knob is above the mid range
setting.

b. Make sure the air supply to the Pro-Cut is

clean and free of oil. Use several extra in line
filters if necessary.

c. Use the lowest output setting possible to make

a good quality cut at the desired cut speed.

d. Minimize dross buildup on the nozzle tip by

starting the cut from the edge of the plate
when possible.

e. Pierce cutting should be done only when nec-

essary. If piercing, angle torch about 30° from
the plane perpendicular to the work piece,
transfer the arc, then bring the torch perpen­dicular to the work and begin parallel move­ment.

f. Reduce the number of pilot arc starts without

transferring to the work.

g. Reduce the pilot arc time before transferring

to the work.

PRO-CUT 55

C-1

ACCESSORIES

C-1

ALWAYS USE GENUINE LINCOLN
ELECTRIC ELECTRODES AND
VORTECH™ NOZZLES

• Only Genuine Lincoln Electric consumables yield
the best cutting performance for the PRO-CUT 55.

• The patented VORTECH™ nozzle provides an

extra “kick” of swirl as the arc exits the nozzle which
improves cutting performance. No other nozzle has

this capability or can match its performance.

GENERAL OPTIONS /
ACCESSORIES

The following options/accessories are available for
your PRO-CUT 55 from your local Lincoln Distributor.

K1600-1 Undercarriage - A valet style undercarriage
with pull-out handle for machine only. Provides Torch
and Work Cable storage.

S22147-043 - VORTECH™ nozzle with an .043” (1.2
mm) Orifice

S22147-068 - VORTECH™ nozzle with an .068” (1.7
mm) Orifice

S22149 - Electrode - replacement electrodes for cut­ting.

S22150 - Shield Cup - This shields the torch tip and
provides more visibility to the workpiece than the drag
cup. Note the shield cup does not prevent the torch tip
from touching the workpiece.

S22151 - Drag Cup - The drag cup protects the torch
by preventing the torch from touching the workpiece.

K1571 Series - PCT 80 Torches come in 25’ and 50’
lengths in either hand held or mechanized versions.

PRO-CUT 55

D-1

MAINTENANCE

D-1

WARNING

ELECTRIC SHOCK can kill.

• Have an electrician install and service
this equipment.

• Turn the input power off at the fuse
box before working on equipment.

• Do not touch electrically hot parts.

• Prior to Performing preventative main-

tenance, perform the following capaci­tor discharge procedure to avoid elec­tric shock.

---------------------------------------------------------------------

INPUT FILTER CAPACIT OR
DISCHARGE PROCEDURE

1. Turn off input power or disconnect input power
lines.

2. Remove the 5/16" hex head screws from the side
and top of the machine and remove wrap-around
machine cover.

3. Be careful not to make contact with the capacitor
terminals that are located on the top and bottom of
the Power Board on the right side of the machine.

4. Obtain a high resistance and high wattage resistor
(25-1000 ohms and 25 watts minimum). This resis­tor is not supplied with machine. NEVER USE A
SHORTING STRAP FOR THIS PROCEDURE.

5. Locate the two capacitor terminals (large hex head
cap screws) on the top and bottom of the Power
P.C. Board shown in Figure D.1.

6. Use electrically insulated gloves and insulated pli­ers. Hold body of the resistor and connect resistor
leads across the two capacitor terminals. Hold
resistor in place for 10 seconds. DO NOT TOUCH
CAPACITOR TERMINALS WITH YOUR BARE
HANDS.

7. Repeat discharge procedure for the other capaci-

tor .

8. Check voltage across terminals of all capacitors
with a DC voltmeter. Polarity of capacitor terminals
is marked on PC board above terminals. Voltage
should be zero. If any voltage remains, repeat this
capacitor discharge procedure.

FIGURE D.1 — LOCATION OF INPUT FILTER CAPACITOR TERMINALS.

POWER

BOARD

RIGHT SIDE OF MACHINE

CAP ACIT OR TERMINALS

UPPER

LOWER
CAPACITOR
TERMINALS

POWER

RESISTOR

INSULATED

PLIERS

INSULATED

GLOVES

PRO-CUT 55

D-2

MAINTENANCE

D-2

ROUTINE MAINTENANCE

1. Keep the cutting or gouging area and the area
around the machine clean and free of combustible
materials. No debris should be allowed to collect
which could obstruct air flow to the machine.

2. Every 6 months or so, the machine should be
cleaned with a low pressure airstream. Keeping the
machine clean will result in cooler operation and
higher reliability. Be sure to clean these areas:

- Power, Output and Control printed circuit
boards and heat sinks

- Power switch

- Main Transformer

- Input Rectifier

3. Examine the sheet metal case for dents or break­age. Repair the case as required. Keep the case in
good condition to insure that high voltage parts are
protected and correct spacings are maintained. All
external sheet metal screws must be in place to
insure case strength and electrical ground continu­ity.

4. Check the air regulator filter to be sure it does not
become clogged. The air filter on the machine is
self draining and will not have to be emptied.

5. Check the filter element every several months to
see if it is clogged (weekly in very dirty environ­ments). Replace if necessary by first removing the
two screws that attach the filter cage to the back
panel assembly, then slide the cage away from the
back of the machine and remove. Next, twist the
clear filter bowl until it comes off (be careful not to
lose the o-ring seated at the top of the bowl
threads). Unscrew the filter element and replace
with new element. Assemble parts in reverse order
as described above.

6. Inspect the cable periodically for any slits or punc­ture marks in the cable jacket. Replace if neces­sary. Check to make sure that nothing is crushing
the cable and blocking the flow of air through the
air tube inside. Also, check for kinks in the cable
periodically and relieve any so as not to restrict the
flow of air to the torch.

PERIODIC MAINTENANCE

WARNING

ELECTRIC SHOCK CAN KILL.

• Turn off machine at the disconnect
switch on the front of the machine
before tightening, cleaning or replacing
consumables.

----------------------------------------------------------------------------

Change consumables as required.

1. Thermal Protection
Two thermostats protect the machine from excessive

operating temperatures. Excessive temperatures may
be caused by a lack of cooling air or operating the
machine beyond the duty cycle and output rating. If
excessive operating temperatures should occur, the
yellow thermal LED will light and the thermostat will
prevent output voltage or current.

Thermostats are self-resetting once the machine cools
sufficiently. If the thermostat shutdown was caused by
excessive output or duty cycle and the fan is operating
normally, the Power Switch may be left on and the
reset should occur within a 15 minute period. If the fan
is not turning or the air intake louvers were obstructed,
then the power must be switched off and the fan prob­lem or air obstruction must be corrected.

2. Filter Capacitor Conditioning (Pro-Cut 55, 400-460
VAC only)

A protection circuit is included to monitor the voltage
across filter capacitors C1 and C2. In the event that
the capacitor voltage is too high, the protection circuit
will prevent output. The protection circuit may prevent
output providing all these circumstances are met:

a. Machine is connected for 400-460 VAC input.
b. Machine did not have power applied for many

months.

c. Machine will not produce output when power is

first switched on.

If these circumstances apply, the proper action is to
switch the machine on and let it idle for up to 30 min­utes. This is required to condition the filter capacitors
after an extended storage time. The protection circuit
will automatically reset once the capacitor conditioning
and resultant voltage levels are acceptable. It may be
necessary to turn the power switch off and back on
again after this period.

PRO-CUT 55

E-1

TROUBLESHOOTING

HOW TO USE TROUBLESHOOTING GUIDE

WARNING

Service and Repair should only be performed by Lincoln Electric Factory Trained Personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician and
machine operator and will invalidate your factory warranty. For your safety and to avoid
Electrical Shock, please observe all safety notes and precautions detailed throughout this
manual.

__________________________________________________________________________

This Troubleshooting Guide is provided to
help you locate and repair possible machine
malfunctions. Simply follow the three-step
procedure listed below.

E-1

Step 1. LOCATE PROBLEM (SYMPTOM).

Look under the column labeled “PROBLEM
(SYMPTOMS)”. This column describes
possible symptoms that the machine may
exhibit. Find the listing that best describes
the symptom that the machine is exhibiting.

Step 2. POSSIBLE CAUSE.

The second column labeled “POSSIBLE
CAUSE” lists the obvious external possibili­ties that may contribute to the machine
symptom.

WARNING

ELECTRIC SHOCK CAN KILL.

• Turn off machine at the disconnect
switch on the front of the machine and
remove main power supply connec­tions before doing any troubleshooting.

----------------------------------------------------------------------------

Step 3. RECOMMENDED COURSE OF
ACTION

This column provides a course of action for
the Possible Cause, generally it states to
contact you local Lincoln Authorized Field
Service Facility.

If you do not understand or are unable to
perform the Recommended Course of
Action safely, contact you local Lincoln
Authorized Field Service Facility.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

PRO-CUT 55

E-2

PROBLEMS

(SYMPTOMS)

TROUBLESHOOTING

Observe all Safety Guidelines detailed throughout this manual

POSSIBLE AREAS OF

MISADJUSTMENTS(S)

RECOMMENDED

COURSE OF ACTION

E-2

No Status indicators light and the fan
does not operate 5 seconds after the
power switch is turned on.

No Status indicators light 5 seconds
after the power switch is turned on,
but the fan operates.

1. Check the input power to be sure
it is on.

2. Check the power line fuses and
machine connection.

3. Disconnect input power at fuse
panel and check line switch conti­nuity. Replace line switch if bad.

4. Auxiliary transformer may be
faulty.

1. Auxiliary transformer may be
faulty.

2. Disconnect input power from the
machine. Check that connectors
on harness between Control Bd.
and Display Bd. are properly seat­ed.

3. Possible faulty Control Board.

If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact

your local Lincoln Authorized
Field Service Facility.

All Status indicators remain lit imme­diately after power up.

All Status indicators begin to blink
within 5 seconds after power up.

1. The microprocessor has experi­enced a memory fault. Consult
local Lincoln Field Service shop.

1. Turn power off. Make sure recon­nect is positioned correctly for the
input voltage used. Wait at least 1
minute after power down before
re-connecting the machine.
Reconnect machine,then restore
power to Pro-Cut.

2. Possible faulty Primary board.

3. Possible faulty Control board.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

PRO-CUT 55

E-3

PROBLEMS

(SYMPTOMS)

TROUBLESHOOTING

Observe all Safety Guidelines detailed throughout this manual

POSSIBLE AREAS OF

MISADJUSTMENTS(S)

RECOMMENDED

COURSE OF ACTION

E-3

The Pro-Cut powers up properly but
there is no response when the trig­ger is pulled and only the POWER
LED is lit.

1. Press Purge button on the front of
the Pro-Cut. If air does not flow,
then:

a. Auxiliary transformer may be

faulty.

b. The main gas solenoid assem-

bly may be faulty. Check or
replace.

c. Possible faulty Output Power

board.

d. Possible faulty Control board.

2. (check for continuity from the bulk­head connector to the molex) See
Wiring Diagram.

3. Remove the handles (or barrel) of
the torch and examine all the con­nections. Pay attention to location
of electrode lead mounting at back
of torch head, broken trigger and
solenoid leads.

If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact

your local Lincoln Authorized
Field Service Facility.

4. Check for proper trigger switch
operation. Remove the torch cable
assembly from the Pro Cut and
test for continuity between 9 and 1
at the quick connect when the trig­ger switch is depressed and no
continuity when the switch is not
depressed. Replace the trigger
switch or torch cable if defective.

5. Possible faulty Control board.

6. Possible faulty Output Power
board.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

PRO-CUT 55

E-4

Observe all Safety Guidelines detailed throughout this manual

PROBLEMS

(SYMPTOMS)

When the trigger is pulled air begins
to flow, but there is no pilot arc after
at least 3 seconds.

The air begins to flow and there is a
very brief arc that snaps out consis­tently with repeated trigger pulls.

TROUBLESHOOTING

POSSIBLE AREAS OF

MISADJUSTMENTS(S)

1.

Check the torch consumables to be
sure they are not dirty or greasy,
and are in good shape. Replace
the consumables if necessary.

2. Make sure the air pressure is set
at 70 psi.

3. Make sure there are no kinks or
restrictions for air flow in the torch
cable. Replace cable as needed.

4. If a slight thump cannot be felt in
the torch when the trigger is
pulled, check for loose connection
in the torch head and solenoid
assembly.

5. With machine turned off - input
power removed, and torch and
consumables connected - mea­sure resistance on Output Power
board between B1 and B21. If
>10Ω, possible fault in torch and
cable assembly.

6. Possible fault in Output board.

1. Check the torch consumables to
be sure they are in tight, not dirty
or greasy and in good shape.
Replace if necessary.

E-4

RECOMMENDED

COURSE OF ACTION

If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact

your local Lincoln Authorized
Field Service Facility.

2. Make sure the air pressure is set
at 70 psi.

Possible fault in Output Power board.

3.

The arc starts but sputters badly.

1. Check the torch consumables to be

sure they are in tight, not dirty or
greasy and in good shape. Replace if
necessary.

2. Check air supply for oil or a great deal

of water. If there is oil or a great deal
of water, the air must be filtered or the
machine switched to nitrogen or bot­tled air.

3. Make sure the air pressure is set at 70

psi.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

PRO-CUT 55

E-5

PROBLEMS

(SYMPTOMS)

TROUBLESHOOTING

Observe all Safety Guidelines detailed throughout this manual

POSSIBLE AREAS OF

MISADJUSTMENTS(S)

RECOMMENDED

COURSE OF ACTION

E-5

Pilot arc starts but will not transfer
when brought near work.

1. Check work lead connection for
clean, secure connection.

Plasma will only cut conductive

2.
material. Do not attempt to cut
fiberglass, plastic, rubber, PVC or
any other non-conductive material.

3. Make sure work piece is clean
and dry. Remove any scale, rust
or dross.

4. Check all connections to Output
board.

5. Possible faulty Control board.

If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact

your local Lincoln Authorized
Field Service Facility.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

PRO-CUT 55

E-6

TROUBLESHOOTING

Observe all Safety Guidelines detailed throughout this manual

STATUS BOARD INDICATORS

E-6

SYMPTOM

Machine is unresponsive immediately after
power-up.

The Air Low LED is lit

The Safety LED is flashing

The Safety LED is lit and steady

CHECK

1. There is a 4 second soft start period for pre-charging the input fil­ter capacitors. Wait until that time is up. The Power LED will light
when ready. If not, refer to the first part of this section.

1. Make sure there is at least 80 psi connected to the gas connec­tion at the back of the machine.

2. Press the Purge button and set the regulator to 70 psi. The pres­sure may increase when air stops flowing but this is normal. Do
not reset the pressure while the air is OFF.

3. Possible faulty Pressure Switch.

4. Possible faulty Control board.

1. Make sure there is a Lincoln torch and cable assembly connect­ed properly to the Pro-Cut bulk head connector.

2. Check consumables for proper installation or excessive wear.
Replace if excessively worn. If not, use a piece of fine emery
cloth to remove any oxide buildup on the tip of the electrode.

1. Press the Reset button. If torch and consumables are properly
installed, the Safety LED should turn off. Normal cutting or goug­ing can resume.

The Thermal LED is lit

1. The machine's thermostat has tripped due to exceeded duty
cycle limits. Do NOT turn the power off. Allow the machine to
cool for 15 - 30 minutes and the thermostat will reset itself.

2. The machine's air louvers or fans are obstructed such that air
cannot flow to properly cool the machine. Remove any foreign
material that may block air flow. Blow the machine out with a
clean, dry air stream.

3. Possible faulty Control board.

PRO-CUT 55

F-1

ENHANCED DIAGRAMS

DIAGRAMS

F-1

B

R

W

G

53
8
N

H1

1

-

RIGHT SIDE OF MACHINE

S1

POWER

VU

W

51

54

56

6

3

2

R

N

R

24V

12V

H2

H3

2

4

TP3

H1

C

TP1

H1

C

D1

F

207

207A

C

B

A

B

B

64
9

U

H4

INPUT

62
5

W

18V

3

TP2

BRIDGE

S2

S3

61
4

U

18V

H5

6

A

A

+

D

209

RESET

277B

PSI_SET

277A

J21

AUXILIARY

TRANSFORMER

J22

A

FRONT OF MACHINE

B = BLACK

G = GREEN

COLOR CODE:

RESET LED

PSI SET

RESET

GND

READY LED

LOW_PSI LED

POT WIPER

+15V

15

216

223

221

64
62

61

T2

THERMAL LED

8

5

9

11

12

13

14

10

219

214

213

218

212

217

18V

2

4

J1

18V

3

1

P_XFMR

RELAY

++VOLT

8

765

J5

4

213

505

506

507

501

502

503

3

2

7

6

4

210

215

275

276

277

223

214

212

215

213

210

219

218

216

217

1

5

3

2

4

8

9

7

6

10

J2

CT

TSTAT

7,8 ELEC SHUNT (TWIST PR)

6

5

4

16

J3

J4

8

1

3

2

Y

WRW

404

Y

S~ Ae 7/16 j 15/32 X−@E333333R 440-460V OPERATION.

401

DISPLAY

1

J40

221

R1

POT

10K

2W

CW (MAX)

CONTROL

276

277

275

277A

O1g 9/64 19/32 &Abhim 57/64 Øp@ @

O1g 9/64 19/32 &Abhim 57/64 Øp@ @

9 AIR SOL

3 IGBT

11 TRIGGER

10 ELEC SOL

2,6 PSI SWITCH

4,5 XFER SHUNT (TWIST PR)

12 GND

9

14

15

12

11

13

10

7

6

3

5

1

2

4

R

302

303

306

150

207A 3/8 @E333333@E333333R 440-460V OPERATION.

312

344

310

W

4

J20

302

CONTROL

309

S5

Y

2

WORK

PRESSURE

R

1

306

W

AIR

361

SOLENOID

366

364

369

2

4

N

N

8

7

400-

9

6

E

460VAC

206

1

2

3

4

5

E

200-

230VAC

202

R = RED

W = WHITE

15

J40

1

Y = YELLOW

U = BLUE

N = BROWN

7

14

J32

J5

J4,J6,

J7,J30

J1,J20

J2,J8,J31

1

4

1

5

1

8

8-7-98A

8

8

5

6

13

4

12

34

CONNECTOR CAVITY NUMBERING SEQUENCE

(VIEWED FROM COMPONENT SIDE OF BOARD)

10

6

16

J3

9

1

L10634

ELECTRICAL SYMBOLS PER E1537

LEFT SIDE OF MACHINE

CASE FRONT

BASE

PROTECTIVE BONDING CIRCUIT

OUTPUT

PC BOARD

T1

MAIN

XFMR

201

205

I

T3

CURRENT

TRANSFORMER

203

207

2
X

0
2

Y

Y

X

S

UT

S

B

FR-O

FR-IN

0
3
X

N

FR-IN

S

S

FR-OUT

2

6

I

N

W

3
X

360

365

1

X10

X

BK-OUT

7

3

S

T

U

BK-O

204

208

X40

BK-IN

S

4
X

S

S

A

BK-IN

N.C.

A

0.6A

A

S4 PRIMARY

RECONNECT

220-

H3

H3

H2

SLOW BLOW

200-

203A

203

202A

202

230V

440-

460V

H5

H4

380-

415V

208V

WIRING DIAGRAM PRO-CUT 55 FOR CODES 10473, 10474

INPUT

PER

5/64 "{œ 1/64 @E333333@E333333PR)

G

Ko "ÞAdm0 ‘Ý 17/32 @ @

2

E

4

361

361

360

3

8

3 NOZZLE

364

4
9

4 ELECTRODE

5,6 AIR SOL

365

5

10

10 WORK

7,8 ELEC SOL

344

310

309

1

3

2

4

9

8

10

11

J32

2 ELEC SOL

8 AIR SOL

3 TRIGGER

13 IGBT

C1

+

-

1200/450

206

203A

404

507

506

505

503

501

502

xxxxxxx

3

2

1

J10

5

6

4

209

RELAY

P_XFMR

++VOLT

201

205

-

C2

207A

POWER

208

204

+

202A

1200/450

(ž 9/64 I@ @

R

R

W

W

2

1
3

4

J33

XFER

ELEC

J30

ELEC

XFER

X4

H1

FAN

H3

369

366

2

1

7

6

X20

X40

J31

1,2 TRIGGER

B21

X2

FAN

FAN

MOTORS

N.A.

REAR OF MACHINE

(ž 9/64 I@ @

J32

51

56

303

312

53

54

1

7

2

6

3

5

5

6

4

14

12

13

14 GND

J30

1,4=24V

3 NOZZLER

E

12V

S

401

xxxxxxx

L1

CHOKE

OUTPUT

FOR THREE PHASE INPUT: CONNECT GREEN LEAD TO GROUND PER NATIONAL ELECTRIC CODE.

CONNECT BLACK, RED & WHITE LEADS TO SUPPLY CIRCUIT.

WRAP RED LEAD WITH TAPE TO PROVIDE 600V. INSULATION.

CONNECT BLACK & WHITE LEADS TO SUPPLY CIRCUIT.

FOR SINGLE PHASE INPUT: CONNECT GREEN LEAD TO GROUND PER NATIONAL ELECTRIC CODE.

1. FOR MACHINES SUPPLIED WITH INPUT CABLE

2. FOR MACHINES NOT SUPPLIED WITH INPUT CABLE

N.A.

NOTES:

FOR THREE PHASE INPUT: GROUND MACHINE PER NATIONAL AND LOCAL ELECTRICAL CODES.

CONNECT TERMINALS U, V & W TO SUPPLY CIRCUIT.

CONNECT TERMINALS U & W TO SUPPLY CIRCUIT.

FOR SINGLE PHASE INPUT: GROUND MACHINE PER NATIONAL AND LOCAL ELECTRICAL CODES.

COMPONENTS OR CIRCUITRY HAVING A COMMON CODE NUMBER.

THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT SHOW THE EXACT

CONNECTION SHOWN IS FOR 440-460V OPERATION.

N.B. SINCE COMPONENTS OR CIRCUITRY OF A PRINTED CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING

N.C. PLACE "A" LEAD ON APPROPRIATE CONNECTION FOR INPUT VOLTAGE.

N.D. C1 AND C2 CAPACITORS ARE A MATCHED SET.

NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The specific diagram for a particular code is pasted inside

the machine on one of the enclosure panels. If the diagram is illegible, write to the Service Department for a replacement. Give the equipment code number..

PRO-CUT 55

F-2

DIAGRAMS

F-2

B

U

R

V

W

W

G

53

56
3

8

N

N

12V

H1

H3

H2

1

5

H1

H1

-

F

207

RIGHT SIDE OF MACHINE

C

2

207A

FRONT OF MACHINE

R = RED

G = GREEN

B = BLACK

COLOR CODE:

S2

S1

POWER

S3

RESET

PSI_SET

277B

READY LED

+15V

15

14

217

216

223

221

277A

64
62

18V18V

J21

AUXILIARY

J22

A

61

T2

TRANSFORMER

T1

01
2

205

61

51

54

64

62
5

6

9

4

2

R

U

U

R

W

18V

18V

24V

H6

H4

H5

4

8

7

TP3

TP2

TP1

A

B

D1

INPUT

BRIDGE

+

D

209

I

LOW_PSI LED

13

212

2
1

J5

3XFMR2MAIN

T

U

I

Y
Y

POT WIPER

12

218

4
3

8
4

B

-IN

-O
FR

RESET LED

PSI SET

RESET

GND

THERMAL LED

5

8

9

11

10

219

214

213

J1

P_XFMR

RELAY

++VOLT

567
123

505

506

507

501

502

503

2
X

S

S

FR

S

S

6

3

2

7

6

4

210

215

275

276

277

223

214

212

215

213

210

219

218

216

217

1

5

3

2

4

8

9

7

6

10

J2

CT

TSTAT

7,8 ELEC SHUNT (TWIST PR)

6

5

4

16

J3

J4

8

123

Y

W

404

Y

401

0
2
X

FR-OUT

FR-IN

0
3
X

N
N

W

3
X

365

1

X10

X

S

K-IN

7

B

S

S

IN

­K

UT

B

O

­K

B

204

208

1

J40

221

275

14

15

7

6

R

306

360

K-OUT

B

S

A

DISPLAY

R1

POT

2W

10K

CONTROL

276

277

277A

3 IGBT

11 TRIGGER

2,6 PSI SWITCH

4,5 XFER SHUNT (TWIST PR)

12 GND

12

11

13

10

3

5

2

4

R

W

302

303

312

344

X40

4
X

CW (MAX)

9 AIR SOL

10 ELEC SOL

9
1

310

W

4

J20

302

CONTROL

309

S5

PRESSURE

Y

2

WORK

W

364

369

2

AIR

4

SOLENOID

R

N

1

N

306

361

366

1

9

8

7

2

3

6

4

5

E

460VAC

230V

440-

380-

208V

206

207

202A

200-

230VAC

202

203

203A

203

202

460V

H5

CASE FRONT

BASE

LEFT SIDE OF MACHINE

OUTPUT

PC BOARD

H4

415V

400-

S4 PRIMARY

RECONNECT

A

220-

H3

H3

H2

0.6A

SLOW BLOW

A

200-

N.C.

7

14

J32

1

N = BROWN

Y = YELLOW

J5,J22

J30

J4,J10,

J1,J20,

J2,J21,

J3

4

1

13

12

J33

5

J31

1

8

1

8

8

5

6

4

4
3

10

6

16

9

U = BLUE

W = WHITE

15

J40

1

PROTECTIVE BONDING CIRCUIT

8-18-2000F

L10942

CONNECTOR CAVITY NUMBERING SEQUENCE

(VIEWED FROM COMPONENT SIDE OF BOARD)

ELECTRICAL SYMBOLS PER E1537

T3

CURRENT

TRANSFORMER

E

2

4

361

361

404

507

506

505

503

501

502

xxxxxxx

3

2

1

J10

5

6

4

209

RELAY

P_XFMR

++VOLT

201

205

207A

202A

-

C2

+

INPUT

PER

+

206

C1

-

1200/450

203A

POWER

208

204

N.A.

WIRING DIAGRAM PRO-CUT 55 FOR CODES 10475, 10476

1200/450

H1

H3

R

J33

X4

R

W

W

2

1
3

4

ELEC

XFER

ELEC

XFER

FAN

REAR OF MACHINE

369

366

2

1

7

6

X20

X40

J31

1,2 TRIGGER

B21

X2

FAN

MOTORS

FAN

360

364

3

4

8

9

4 ELECTRODE

5,6 AIR SOL

3 NOZZLE

365

1

5

8

10

7,8 ELEC SOL

10 WORK

309

J32

310

2

9

8 AIR SOL

344

3

10

2 ELEC SOL

3 TRIGGER

G

51

56

303

312

53

54

1

7

2

6

3

5

4

5

6

4

11

14

13

13 IGBT

12

14 GND

E

12V

401

S

xxxxxxx

J30

1,4=24V

L1

CHOKE

OUTPUT

CONNECT BLACK, RED & WHITE LEADS TO SUPPLY CIRCUIT.

WRAP RED LEAD WITH TAPE TO PROVIDE 600V. INSULATION.

FOR THREE PHASE INPUT: CONNECT GREEN LEAD TO GROUND PER NATIONAL ELECTRIC CODE.

FOR SINGLE PHASE INPUT: CONNECT GREEN LEAD TO GROUND PER NATIONAL ELECTRIC CODE.

CONNECT BLACK & WHITE LEADS TO SUPPLY CIRCUIT.

1. FOR MACHINES SUPPLIED WITH INPUT CABLE

N.A.

NOTES:

CONNECT TERMINALS U, V & W TO SUPPLY CIRCUIT.

FOR THREE PHASE INPUT: GROUND MACHINE PER NATIONAL AND LOCAL ELECTRICAL CODES.

FOR SINGLE PHASE INPUT: GROUND MACHINE PER NATIONAL AND LOCAL ELECTRICAL CODES.

CONNECT TERMINALS U & W TO SUPPLY CIRCUIT.

COMPONENTS OR CIRCUITRY HAVING A COMMON CODE NUMBER.

2. FOR MACHINES NOT SUPPLIED WITH INPUT CABLE

THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT SHOW THE EXACT

CONNECTION SHOWN IS FOR 440-460V OPERATION.

N.B. SINCE COMPONENTS OR CIRCUITRY OF A PRINTED CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING

N.C. PLACE "A" LEAD ON APPROPRIATE CONNECTION FOR INPUT VOLTAGE.

N.D. C1 AND C2 CAPACITORS ARE A MATCHED SET.

NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The specific diagram for a particular code is pasted inside

the machine on one of the enclosure panels. If the diagram is illegible, write to the Service Department for a replacement. Give the equipment code number..

PRO-CUT 55

F-3

OFF

XXXX

XXXX

XXXX

XXXX

DIAGRAMS

10-31-97D

M18806

F-3

25.94

19.502.95

DIMENSION PRINT PRO-CUT 55

XXXX

XXXX

XXXX

XXXX

PRO-CUT 55

OFF

PRO-CUT 55

12.60

11.00

NOTES

PRO-CUT 55

WARNING

Spanish

AVISO DE

PRECAUCION

● Do not touch electrically live parts or

electrode with skin or wet clothing.

● Insulate yourself from work and

ground.

● No toque las partes o los electrodos

bajo carga con la piel o ropa moja­da.

● Aislese del trabajo y de la tierra.

● Keep flammable materials away.

● Mantenga el material combustible

fuera del área de trabajo.

● Wear eye, ear and body protection.

● Protéjase los ojos, los oídos y el

cuerpo.

French

ATTENTION

German

WARNUNG

Portuguese

ATENÇÃO

Japanese

Chinese

Korean

Arabic

● Ne laissez ni la peau ni des vête-

ments mouillés entrer en contact
avec des pièces sous tension.

● Isolez-vous du travail et de la terre.

● Berühren Sie keine stromführenden

Teile oder Elektroden mit Ihrem
Körper oder feuchter Kleidung!

● Isolieren Sie sich von den

Elektroden und dem Erdboden!

● Não toque partes elétricas e elec-

trodos com a pele ou roupa molha­da.

● Isole-se da peça e terra.

● Gardez à l’écart de tout matériel

inflammable.

● Entfernen Sie brennbarres Material!

● Mantenha inflamáveis bem guarda-

dos.

● Protégez vos yeux, vos oreilles et

votre corps.

● Tragen Sie Augen-, Ohren- und Kör-

perschutz!

● Use proteção para a vista, ouvido e

corpo.

READ AND UNDERSTAND THE MANUFACTURER’S INSTRUCTION FOR THIS EQUIPMENT AND THE CONSUMABLES TO BE
USED AND FOLLOW YOUR EMPLOYER’S SAFETY PRACTICES.

SE RECOMIENDA LEER Y ENTENDER LAS INSTRUCCIONES DEL FABRICANTE PARA EL USO DE ESTE EQUIPO Y LOS
CONSUMIBLES QUE VA A UTILIZAR, SIGA LAS MEDIDAS DE SEGURIDAD DE SU SUPERVISOR.

LISEZ ET COMPRENEZ LES INSTRUCTIONS DU FABRICANT EN CE QUI REGARDE CET EQUIPMENT ET LES PRODUITS A
ETRE EMPLOYES ET SUIVEZ LES PROCEDURES DE SECURITE DE VOTRE EMPLOYEUR.

LESEN SIE UND BEFOLGEN SIE DIE BETRIEBSANLEITUNG DER ANLAGE UND DEN ELEKTRODENEINSATZ DES HER­STELLERS. DIE UNFALLVERHÜTUNGSVORSCHRIFTEN DES ARBEITGEBERS SIND EBENFALLS ZU BEACHTEN.

● Keep your head out of fumes.

● Use ventilation or exhaust to

remove fumes from breathing zone.

● Turn power off before servicing.

● Do not operate with panel open or

guards off.

WARNING

● Los humos fuera de la zona de res-

piración.

● Mantenga la cabeza fuera de los

humos. Utilice ventilación o
aspiración para gases.

● Gardez la tête à l’écart des fumées.

● Utilisez un ventilateur ou un aspira-

teur pour ôter les fumées des zones
de travail.

● Vermeiden Sie das Einatmen von

Schweibrauch!

● Sorgen Sie für gute Be- und

Entlüftung des Arbeitsplatzes!

● Mantenha seu rosto da fumaça.

● Use ventilação e exhaustão para

remover fumo da zona respiratória.

● Desconectar el cable de ali-

mentación de poder de la máquina
antes de iniciar cualquier servicio.

● Débranchez le courant avant l’entre-

tien.

● Strom vor Wartungsarbeiten

abschalten! (Netzstrom völlig öff­nen; Maschine anhalten!)

● Não opere com as tampas removidas.

● Desligue a corrente antes de fazer

serviço.

● Não toque as partes elétricas nuas.

● No operar con panel abierto o

guardas quitadas.

● N’opérez pas avec les panneaux

ouverts ou avec les dispositifs de
protection enlevés.

● Anlage nie ohne Schutzgehäuse

oder Innenschutzverkleidung in
Betrieb setzen!

● Mantenha-se afastado das partes

moventes.

● Não opere com os paineis abertos

ou guardas removidas.

Spanish

AVISO DE

PRECAUCION

French

ATTENTION

German

WARNUNG

Portuguese

ATENÇÃO

Japanese

Chinese

Korean

Arabic

LEIA E COMPREENDA AS INSTRUÇÕES DO FABRICANTE PARA ESTE EQUIPAMENTO E AS PARTES DE USO, E SIGA AS
PRÁTICAS DE SEGURANÇA DO EMPREGADOR.

• World's Leader in Welding and Cutting Products •

• Sales and Service through Subsidiaries and Distributors Worldwide •

Cleveland, Ohio 44117-1199 U.S.A. TEL: [phone] FAX: [phone] WEB SITE: www.lincolnelectric.com