RETURN TO MAIN INDEX
IM594
PRO-CUTTM 20 May, 2000
10464
For use with machines having Code Number:
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 thought-
ful 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.
Date of Purchase:
Serial Number:
Code Number:
Model:
Where Purchased:
OPERATOR’S MANUAL
� World's Leader in Welding and Cutting Products �
� Sales and Service through Subsidiaries and Distributors Worldwide �
Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com
i i
SAFETY
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 pur-
chase 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 FUMES AND GASES
can be dangerous.
kill.
3.a. Plasma cutting or gouging may produce
1.a. The electrode and work (or ground) circuits
fumes and gases hazardous to health. Avoid
are electrically “hot� when the power source is on.
breathing these fumes and gases.When cutting
Do not touch these “hot� parts with your bare skin
or gouging, keep your head out of the fumes.
or wet clothing. Wear dry, hole-free gloves to
Use enough ventilation and/or exhaust at the arc
insulate hands.
to keep fumes and gases away from the breathing zone.
When cutting or gouging on lead or cadmium plated
1.b. When the power source is operating voltages in excess of
steel and other metals or coatings which produce highly
250 volts are produced. This creates the potential for serious
toxic fumes keep exposure as low as possible and
electrical shock - potentially even fatal. below Threshold Limit Values (TLV) using local exhaust
or mechanical ventilation. In confined spaces or in some
1.c. Insulate yourself from work and ground using dry insulation. circumstances, outdoors, a respirator may be required.
When cutting or gouging in damp locations, on metal frame- Additional precautions are also required when welding
work such as floors, gratings or scaffolds and when in posi- on galvanized steel.
tions such as sitting or lying, make certain the insulation is
3.b. Do not use plasma arc cutting or gouging in locations near
large enough to cover your full area of physical contact with
chlorinated hydrocarbon vapors coming from degreasing,
work and ground.
cleaning or spraying operations. The heat and rays of the arc
can react with solvent vapors to form phosgene, a highly
1.d. Always be sure the work cable makes a good electrical con-
toxic gas, and other irritating products.
nection with the metal being cut or gouged. The connection
should be as close as possible to the area being cut or 3.c. Gases used for plasma cutting and gouging can displace air
gouged. and cause injury or death. Always use enough ventilation,
especially in confined areas, to insure breathing air is safe.
1.e. Ground the work or metal to be cut or gouged to a good elec-
3.d. Read and understand the manufacturer’s instructions for this
trical (earth) ground.
equipment and the consumables to be used, including the
material safety data sheet (MSDS) and follow your employ-
1.f. Maintain the plasma torch, cable and work clamp in good,
er’s safety practices.
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.
CUTTING SPARKS can
1.h. When working above floor level, protect yourself from a fall
should you get a shock.
cause fire or explosion.
1.i. Operate the pilot arc with caution. The pilot arc is capable of 4.a..Remove fire hazards from the plasma cut-
burning the operator, others or even piercing safety clothing. ting or gouging area. If this is not possible, cover
them to prevent the cutting or gouging sparks
1.j. Also see Items 4c and 6. from starting a fire. Remember that welding
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, spe-
cial precautions should be used to prevent hazardous situa-
tions. Refer to “Safety in Welding and Cutting� (ANSI
Standard Z49.1) and the operating information for the equip-
ARC RAYS can burn. ment being used.
2.a. Use safety glasses and a shield with the prop-
er filter and cover plates to protect your eyes from 4.c. When not cutting or gouging, make certain no part of the elec-
sparks and the rays of the arc when performing or trode circuit is touching the work or ground. Accidental con-
observing plasma arc cutting or gouging. tact can cause overheating and create a fire hazard.
Glasses,headshield and filter lens should conform
to ANSI Z87. I standards. 4.d. Do not cut or gouge tanks, drums or containers until the prop-
er steps have been taken to insure that such procedures will
2.b. Use suitable clothing including gloves made from durable not cause flammable or toxic vapors from substances inside.
flame-resistant material to protect your skin and that of your They can cause an explosion even though they have been
helpers from the arc rays. “cleaned.� For information purchase “Recommended Safe
Practices for the Preparation for Welding and Cutting of
2.c. Protect other nearby personnel with suitable non-flammable Containers and Piping That Have Held Hazardous
screening and/or warn them not to watch the arc nor expose Substances�, AWS F4.1 from the American Welding Society
themselves to the arc rays or to hot spatter or metal. (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.
Apr. �93
ii ii
SAFETY
4.g. Sparks and spatter are thrown from the plasma arc. Wear
PLASMA ARC can injure.
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
7.a. Keep your body away from nozzle and
or gouging out of position or in confined places. Always wear
plasma arc.
safety glasses with side shields when in a cutting or gouging
area.
7.b. Operate the pilot arc with caution. The pilot arc is capable of
4.h. Connect the work cable to the work as close to the cutting or
burning the operator, others or even piercing safety clothing.
gouging area as practical. Work cables connected to the build-
ing 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 contain-
ing 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
ELECTRIC AND MAGNETIC FIELDS
condition.
may be dangerous
5.b. Always keep cylinders in an upright position securely
8.a. Electric current flowing through any con-
chained to an undercarriage or fixed support.
ductor causes localized Electric and Magnetic
5.c. Cylinders should be located: Fields (EMF). Cutting or gouging current cre-
� Away from areas where they may be struck or subjected to ates EMF fields around torch cables and cutting
physical damage. machines.
� A safe distance from plasma cutting or gouging, arc weld-
ing operations and any other source of heat, sparks, 8.b. EMF fields may interfere with some pacemakers, so opera-
or flame. tors having a pacemaker should consult their physician
before cutting or gouging.
5.d. Never allow any part of the electrode, torch or any other
electrically “hot� parts to touch a cylinder.
8.c. Exposure to EMF fields during cutting or gouging may have
other health effects which are now not known.
5.e. Keep your head and face away from the cylinder valve outlet
when opening the cylinder valve.
8d. All operators should use the following procedures in order to
5.f. Valve protection caps should always be in place and hand minimize exposure to EMF fields from the cutting or gouging
tight except when the cylinder is in use or connected for circuit:
use.
8.d.1. Route the torch and work cables together - Secure
5.g. Read and follow the instructions on compressed gas cylin- them with tape when possible.
ders, associated equipment, and CGA publication P-l,
“Precautions for Safe Handling of Compressed Gases in 8.d.2. Never coil the torch cable around your body.
Cylinders,â€available from the Compressed Gas Association
1235 Jefferson Davis Highway, Arlington, VA 22202. 8.d.3. Do not place your body between the torch and
work cables. If the torch cable is on your right side,
FOR ELECTRICALLY the work cable should also be on your right side.
powered equipment. 8.d.4. Connect the work cable to the workpiece as close as
possible to the area being cut or gouged.
6.a. Turn off input power using the disconnect
switch at the fuse box before working on the
8.d.5. Do not work next to cutting power source.
equipment.
6.b. Install equipment in accordance with the U.S. National
Electrical Code, all local codes and the manufacturer’s rec-
ommendations.
6.c. Ground the equipment in accordance with the U.S. National
Electrical Code and the manufacturer’s recommendations.
Apr. �93
iii iii
SAFETY
zones où l’on pique le laitier.
PRÉCAUTIONS DE SÛRETÉ
6. Eloigner les matériaux inflammables ou les recouvrir afin de
Pour votre propre protection lire et observer toutes les instructions
prévenir tout risque d’incendie dû aux étincelles.
et les précautions de sûreté specifiques qui parraissent dans ce
manuel aussi bien que les précautions de sûreté générales suiv-
7. Quand on ne soude pas, poser la pince à une endroit isolé de
antes:
la masse. Un court-circuit accidental peut provoquer un
échauffement et un risque d’incendie.
Sûreté Pour Soudage A L’Arc
1. Protegez-vous contre la secousse électrique:
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
a. Les circuits à l’électrode et à la piéce sont sous tension
la masse sur la charpente de la construction ou d’autres
quand la machine à souder est en marche. Eviter toujours
endroits éloignés de la zone de travail, on augmente le risque
tout contact entre les parties sous tension et la peau nue
de voir passer le courant de soudage par les chaines de lev-
ou les vétements mouillés. Porter des gants secs et sans
age, câbles de grue, ou autres circuits. Cela peut provoquer
trous pour isoler les mains.
des risques d’incendie ou d’echauffement des chaines et des
b. Faire trés attention de bien s’isoler de la masse quand on
câbles jusqu’� ce qu’ils se rompent.
soude dans des endroits humides, ou sur un plancher
metallique ou des grilles metalliques, principalement dans
9. Assurer une ventilation suffisante dans la zone de soudage.
les positions assis ou couché pour lesquelles une grande
Ceci est particuliérement important pour le soudage de tôles
partie du corps peut être en contact avec la masse.
galvanisées plombées, ou cadmiées ou tout autre métal qui
c. Maintenir le porte-électrode, la pince de masse, le câble
produit des fumeés toxiques.
de soudage et la machine à souder en bon et sûr état
defonctionnement.
10. Ne pas souder en présence de vapeurs de chlore provenant
d.Ne jamais plonger le porte-électrode dans l’eau pour le
d’opérations de dégraissage, nettoyage ou pistolage. La
refroidir.
chaleur ou les rayons de l’arc peuvent réagir avec les vapeurs
e. Ne jamais toucher simultanément les parties sous tension
du solvant pour produire du phosgéne (gas fortement toxique)
des porte-électrodes connectés à deux machines à souder
ou autres produits irritants.
parce que la tension entre les deux pinces peut être le
total de la tension à vide des deux machines.
11. Pour obtenir de plus amples renseignements sur la sûreté,
f. Si on utilise la machine à souder comme une source de
voir le code “Code for safety in welding and cutting� CSA
courant pour soudage semi-automatique, ces precautions
Standard W 117.2-1974.
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
PRÉCAUTIONS DE SÛRETÉ POUR
enrouler le câble-électrode autour de n’importe quelle partie
LES MACHINES À SOUDER À
du corps.
TRANSFORMATEUR ET À
3. Un coup d’arc peut être plus sévère qu’un coup de soliel,
REDRESSEUR
donc:
a. Utiliser un bon masque avec un verre filtrant approprié
ainsi qu’un verre blanc afin de se protéger les yeux du ray- 1. Relier à la terre le chassis du poste conformement au code de
onnement de l’arc et des projections quand on soude ou l’électricité et aux recommendations du fabricant. Le dispositif
quand on regarde l’arc. de montage ou la piece à souder doit être branché à une
b. Porter des vêtements convenables afin de protéger la bonne mise à la terre.
peau de soudeur et des aides contre le rayonnement de
l‘arc. 2. Autant que possible, I’installation et l’entretien du poste seront
c. Protéger l’autre personnel travaillant à proximité au effectués par un électricien qualifié.
soudage à l’aide d’écrans appropriés et non-inflammables.
3. Avant de faires des travaux à l’interieur de poste, la debranch-
4. Des gouttes de laitier en fusion sont émises de l’arc de er à l’interrupteur à la boite de fusibles.
soudage. Se protéger avec des vêtements de protection libres
de l’huile, tels que les gants en cuir, chemise épaisse, pan- 4. Garder tous les couvercles et dispositifs de sûreté à leur
talons sans revers, et chaussures montantes. place.
5. Toujours porter des lunettes de sécurité dans la zone de
soudage. Utiliser des lunettes avec écrans lateraux dans les
Mar. �93
v v
for selecting a QUALITY product by Lincoln Electric. We want you
Thank You to take pride in operating this Lincoln Electric Company product
•â?¢â?? 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.
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.
vi
TABLE OF CONTENTS
Page
Installation.......................................................................................................................Section A
Technical Specifications .......................................................................................................A-1
Safety Precautions ...............................................................................................................A-2
Select Proper Location .........................................................................................................A-2
Stacking................................................................................................................................A-2
Tilting ....................................................................................................................................A-2
High Frequency Interference Protection...............................................................................A-2
Input Electrical Connections .................................................................................................A-2
Gas Input Connections .........................................................................................................A-3
Output Connections..............................................................................................................A-3
Torch .............................................................................................................................A-3
Operation.........................................................................................................................Section B
Safety Precautions ...............................................................................................................B-1
Description ...........................................................................................................................B-1
Preheat Temperature for Plasma Cutting.............................................................................B-1
User Responsibility...............................................................................................................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-5
Procedure Recommendations ..............................................................................................B-6
General .........................................................................................................................B-6
Thin Gauge Sheet and Material up to 1/4� ....................................................................B-6
Suggestions for Extra Utility from the PRO-CUT System .............................................B-6
Accessories .....................................................................................................Section C
Genuine Lincoln Parts ...........................................................................................C-1
General Options / Accessories ..............................................................................C-1
Maintenance ....................................................................................................Section D
Safety Precautions ................................................................................................D-1
Routine Maintenance.............................................................................................D-1
Periodic Maintenance ............................................................................................D-1
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
Parts Lists ........................................................................................................Appendix
PRO-CUT 20 ...........................................................................................P310 Series
Torch................................................................................................................P210-L
A-1 A-1
INSTALLATION
TECHNICAL SPECIFICATIONS - PRO-CUT 20 (K1579-1)
INPUT - SINGLE PHASE / 60 HERTZ ONLY
Standard Voltage 1Ø Input Current at Rated Output
115/230/1/60Hz 115: 34A@20%
230: 18A@20%
RATED OUTPUT
Duty Cycle AMPS VOLTS
20% Duty Cycle 20 90
OUTPUT
Current Open Circuit Pilot Current
Range Voltage
400 VDC 15 Amps @ 50% Duty Cycle
12-20 Amps
REQUIRED GAS FLOW RATE REQUIRED GAS INLET PRESSURE
65 PSI @ 240 SCFH 80 to 150 PSI
( 4.4 Bar. @ 10160 LHR) ( 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
AC Input Fuse Type 75oC
Voltage at (Super Lag) Copper Wire in Conduit AWG (IEC) Sizes
60 Hertz Circuit Breaker
(Delay Type)
1 Ground Wire
2 Input Supply Wires
1Ø - 115 20 AMPS #14 (3.2mm2) #14 (3.2mm2)
1Ø - 230 20 AMPS #14 (3.2mm2) #14 (3.2mm2)
PHYSICAL DIMENSIONS
Weight
Including Machine
Height Width Depth
Torch Cable (Length)
34.8 lbs.
15.8 kg.
10.2 in. 6.3 in. 16.1 in.
260 mm 160 mm 410 mm
A-2 A-2
INSTALLATION
Read entire Installation Section before installing the HIGH FREQUENCY INTERFERENCE
PRO-CUT 20.
PROTECTION
The Pro-Cut 20 employs a touch start mechanism for
SAFETY PRECAUTIONS arc initiation which eliminates high frequency emis-
sions from the machine as compared with spark gap
WARNING and solid state type high frequency generators. Keep
in mind, though, that these machines may be used in
ELECTRIC SHOCK CAN KILL. an environment where other high frequency generat-
� Only qualified personnel ing machines are operating. By taking the following
should install this machine. steps, high frequency interference into the Pro-Cut
can be minimized
� Turn the input power OFF
at the disconnect switch or (1) Make sure the power supply chassis is connected
fuse box and discharge input to a good earth ground. The work terminal ground
capacitors before working does NOT ground the machine frame.
inside the equipment.
(2) Keep the work ground clamp isolated from other
� Do not touch electrically hot parts. work clamps that have high frequency.
� Turn the PRO-CUT Power Switch OFF (3) If the ground clamp cannot be isolated, then keep
when connecting power cord to input the clamp as far as possible from other work
power. clamp connections.
___________________________________________
(4) When the machine is enclosed in a metal building,
SELECT PROPER LOCATION several good earth driven electrical grounds
around the periphery of the building are recom-
Place the Pro-Cut 20 where clean cool air can freely mended.
circulate in and out the side louvers. Dirt, dust or any
foreign material that can be drawn into the machine Failure to observe these recommended installation
should be kept at a minimum. Failure to observe these procedures may cause improper function of the Pro-
precautions can result in excessive operating temper- Cut or possibly even damage to the control system or
atures and nuisance shutdown of the machine. power supply components.
A source of clean, dry air or nitrogen must be supplied
INPUT ELECTRICAL
to the Pro-Cut 20. Oil in the air is a severe problem
CONNECTIONS
and must be avoided. The supply pressure must be
between 80 and 150 psi. The flow rate is approximate-
The Pro-Cut 20 is rated for 115VAC or 230VAC inputs
ly 4.0 cfm (113 l/min.). Failure to observe these pre-
and will automatically reconnect for the supplied volt-
cautions could result in excessive operating tempera-
age. The machine is shipped from the factory for oper-
tures or damage to the torch.
ation on 115VAC 15 amp circuits. Use on 15 amp
branch circuits will limit cutting output as indicated by
STACKING the graphics around the output knob. If the output is
set at 20 amps (maximum) the input fuse or circuit
The PRO-CUT 20 cannot be stacked. breaker will “blow� in roughly 30 seconds (depending
on fuse type).
To achieve full output current with 115VAC inputs,
TILTING replace the 15 amp plug with the supplied 20 amp
plug and connect the unit to a 20 amp branch circuit
The PRO-CUT 20 must be placed on a stable, level with super lag fuses (or equivalent breaker). To install
surface so it will not topple over. the supplied 20A plug: Connect the white (neutral)
wire under terminal clamp with silver screw, and black
(hot) wire under terminal clamp with brass screw.
Connect green wire under terminal clamp with green
screw. Tighten terminal wire clamp screws securely.
PRO-CUT 20
A-3 A-3
INSTALLATION
WARNING: Failure to wire as instructed may cause the rear of the machine. To use the air fitting
personal injury or damage to equipment. To be supplied with the machine (packaged in the
installed or checked by an electrician or qualified per- consumable kit), install the fitting in the port at
son only. Use of normal 20 amp household breakers the rear of the machine.
may result in over current trips. If breaker trips occur,
reduce the cutting current output until nuisance trips NOTE: When using nitrogen gas from a cylinder, the
stop. cylinder must have a pressure regulator.
The Pro-Cut 20 performs best when connected to � Maximum psi from a nitrogen gas cylinder to
230VAC inputs. To change over to 230VAC operation, the PRO-CUT 20 regulator should never
install a 230VAC plug with a current rating greater exceed 150 psi.
than 15 amps.
� Install a hose between the nitrogen gas
For use on engine drives, keep in mind the above cylinder regulator and the PRO-CUT 20
input draw restrictions and the following precaution. gas inlet.
The Pro-Cut 20 can be operated on engine driven
WARNING
generators as long as the 230 volt auxiliary meets the
following conditions: CYLINDER could explode if damaged.
� The AC waveform peak voltage is below 375 volts*. � Keep cylinder upright and chained
� The AC waveform frequency is between 45 and 65 to a fixed support.
Hz.
� The RMS voltage of the AC waveform is always � Keep cylinder away from areas
greater than 208VAC *. where it could be damaged.
* for 115 VAC input divide these values in half
� Never lift machine with cylinder
The following Lincoln engine drives meet these condi- attached.
tions when run in the high idle mode:
Ranger 300 engine drives � Never allow the cutting torch to touch the
Commander 400 engine drives cylinder.
Many engine drives do not meet these conditions (eg � Keep cylinder away from live electrical
LE North America Ranger series, Miller Bobcats, etc). parts.
Operation of the above stated power sources is not
recommended on engine drives not conforming to � Maximum inlet pressure 150 psi.
these conditions. Such combinations may overvoltage
__________________
the Pro-Cut 20 power source.
GAS INPUT CONNECTIONS
OUTPUT CONNECTIONS
Supply the PRO-CUT 20 with clean compressed air or
nitrogen.
Torch
� Supply pressure must be between 80 psi
and 150 psi. The Pro-Cut 20 is sent from the factory with a PCT 20
cutting torch installed. Additional cutting torches can
� Flow rate should be approximately 4.0 be ordered from the K1615 series. Hand-held torches
cfm (113 I/min.). come with 15' or 25� cables.
NOTE: Oil in the air supply to the PRO-CUT 20 can Read and understand this entire section before oper-
cause severe problems. Use only a clean air ating the machine.
supply.
� Compressed gas can be supplied either
through the air fitting supplied with the
machine or through the 1/4-19 BSPP thread at
PRO-CUT 20
B-1 B-1
OPERATION
DESCRIPTION
SAFETY PRECAUTIONS
WARNING The Pro-Cut 20 is a constant current, continuous con-
trol plasma cutting power source. It provides superior
and reliable starting characteristics, cutting visibility
ELECTRIC SHOCK
and arc stability. The control system has a safety
can kill.
mechanism to insure that the nozzle and electrode are
� Do not touch electrically live parts in place before cutting or gouging. This is extremely
or electrode with skin or wet important due to the high voltages involved.
clothing.
The Pro-Cut 20 comes standard with an air regulator
� Insulate yourself from work and and pressure gauge. The machine also comes with an
ground.
input power cord. Hand-held torches are available in
15' or 25' cable. Consumables are included with each
� Always wear dry insulating
Pro-Cut purchase so that cutting can begin right out of
gloves.
the box. Consumables can also be ordered as indi-
vidual packages.
FUMES AND GASES
can be dangerous.
The Pro-Cut 20 initiates the plasma arc with a simple,
� Keep your head out of fumes. yet reliable, touch start mechanism. This system elimi-
nates many of the failure problems associated with hi-
� Use ventilation or exhaust to frequency start systems.
remove fumes from breathing
zone.
PREHEAT TEMPERATURE FOR
WELDING, CUTTING and
PLASMA CUTTING
GOUGING SPARKS
can cause fire or explosion
Preheat temperature control is not necessary in most
� Keep flammable material away. applications when plasma arc cutting or gouging.
Preheat temperature control may be necessary on high
� Do not weld, cut or gouge on carbon alloy steels and heat treated aluminum for crack
containers that have held combustibles. resistance and hardness control. Job conditions, pre-
vailing codes, alloy level, and other considerations may
ARC RAYS also require preheat temperature control. The following
can burn. minimum preheat temperature is recommended as a
starting point. Higher temperatures may be used as
� Wear eye, ear and body required by the job conditions and/or prevailing codes.
protection. If cracking or excessive hardness occurs on the cut
face, higher preheat temperature may be required. The
PLASMA ARC recommended minimum preheat temperature for plate
can injure thickness up to 1/2" (12.7mm) is 70°F (21.1°C).
� 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.
PRO-CUT 20
B-2 B-2
OPERATION
USER RESPONSIBILITY - Continuous control, 12 - 20 amps.
- Reliable touch start mechanism for plasma arc initi-
Because design, fabrication, erection and cutting vari-
ation.
ables affect the results obtained in applying this type
of information, the serviceability of a product or struc-
- Rapid arc restrike for fast cutting of expanded metal.
ture is the responsibility of the user. Variation such as
plate chemistry, plate surface condition (oil, scale),
- Input over voltage protection.
plate thickness, preheat, quench, gas type, gas
flowrate and equipment may produce results different
- Bright 3.0 second timed pilot arc.
than those expected. Some adjustments to proce-
dures may be necessary to compensate for unique
- Purge momentary push button.
individual conditions. Test all procedures duplicating
actual field conditions.
- Air regulator and pressure gage included.
- Parts-in-Place mechanism to detect proper installa-
OPERATIONAL FEATURES AND tion of consumables and torch.
CONTROLS
- Latching Parts-in-Place mechanism. Requires the
operator to turn the machine off and then on to
The PRO-CUT 20 comes with an ON/OFF POWER
reset.
SWITCH, OUTPUT CURRENT CONTROL, and
PURGE BUTTON.
- Preflow/Postflow timing. Preflow is eliminated if arc
DESIGN FEATURES AND is re-initiated in Postflow.
ADVANTAGES
- Thermostatic Protection.
The PRO-CUT 20 design makes plasma cutting
- Solid state over-current protection.
uncomplicated. This list of design features and advan-
tages will help you understand the machine's total
- Automatic reconnect for 115 VAC or 230 VAC
capabilities so that you can get maximum use from
inputs.
your machine.
- Dead front display for machine status.
- Light weight and portable design for industrial use.
- Unique electrode and Vortechâ„? nozzle design for
optimum cooling and long life.
- Swirl texture inside Vortechâ„? nozzle for better start-
ing reliability and higher quality cuts.
PRO-CUT 20
B-3 B-3
OPERATION
CUTTING CAPABILITY
The PRO-CUT 20 is rated at 20 amps, at 20% duty cycle on a 10 minute basis. 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 20 when cutting mild steel. (The graph plots cut thickness vs.
torch travel speed with a torch standoff of 0.15".
Lincoln's PRO-CUT 20
Aluminum vs Mild Steel Cut Capacity Chart
100
Recommended Torch Travel Speed (IPM)
Thick Line: Aluminum
Thin Line: Mild Steel
80
80% of Maximum Speed
60
40
20
20 A
0
0.062 0.125 0.187 0.250
Material Thickness
Figure B.1
CONSUMABLE LIFE
The expected life for the Pro-Cut 20's electrode under normal operating conditions is approximately 1000
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 20
B-4 B-4
OPERATION
LIMITATIONS � 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.
Do not exceed output current and duty cycle rating of
- Adjust the gas regulator for 65 PSI for 15� or 25�
machine. Do not use the PRO-CUT 20 for pipe thaw-
torches.
ing.
- Release the Purge button.
- The gas will immediately turn off. The pressure
CONTROLS AND SETTINGS 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 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
When preparing to cut, position the machine as close
onto the metal at a 300 angle away from the opera-
to the work as possible. Make sure you have all
tor. This will blow the dross away from the torch tip.
materials needed to complete the job and have taken
Slowly rotate the torch to vertical position as the arc
all safety precautions. It is important to follow these
becomes deeper.
operating steps each time you use the machine.
TORCH AT 300 ANGLE
� Turn the machine's ON/OFF POWER SWITCH to
TO PIERCE
OFF position.
� Connect the air supply to the machine.
ROTATE TO
0
90 ANGLE TO CUT
� Turn the main power and the machine power switch 300
on.
- The fan should start. 900 VERTICAL ANGLE
VERTICAL
- The pre-charge circuit will operate for 3 seconds, FOR CUTTING
then the green "Power" LED should turn on.
CUT
� Be sure that the work lead is clamped to the work-
piece before cutting.
� Keep moving while cutting. Cut at a steady speed
without pausing. Maintain the cutting speed so that
� Set the output current control knob at maximum
the arc leg is 10° to 20° behind the travel direction.
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.
PRO-CUT 20
B-5 B-5
OPERATION
� After the problem is found, or if there is nothing
5° - 15° Leading Angle
apparently wrong, reset the machine by turning the
power switch OFF and then ON again. (It is possi-
ble for electrical noise to trip the safety circuit on
rare occasions. This should not be a regular occur-
rence.)
Direction of Travel
WARNING
ELECTRIC SHOCK CAN KILL.
� Turn off machine at the disconnect
switch on the front of the machine
10° - 20° Arc Lag
before tightening, cleaning or replacing
consumables.
� Use a 5° - 15° leading angle in the direction of the cut.
----------------------------------------------------------------------------
� Finish the cut to be made and release the trigger. � If the machine does not reset or continues to trip,
consult the Troubleshooting Section.
� When the trigger is released, the arc will stop.
� Use the proper cutting procedures referred to in
- The gas will continue to flow for 10 seconds of Procedure Recommendations.
postflow. If the trigger is activated within this time
period, the pilot arc will immediately restart.
PILOT ARC DISCUSSION
� If the dross is difficult to remove, reduce the cutting
speed. High speed dross is more difficult to remove The PRO-CUT has a smooth, continuous pilot arc.
than low speed dross. The pilot arc is only a means of transferring the arc to
the workpiece for cutting. Repeated pilot arc starts, in
� The right side of the cut is more square than the left rapid succession, is not recommended as these starts
as viewed along the direction of travel. will generally reduce consumable life. Occasionally,
the pilot arc may sputter or start intermittently. This is
� Clean spatter and scale from the nozzle frequently. 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 work-
� If the "SAFETY" LED lights at any time; check the
piece and not for numerous starts without cutting.
following:
When the pilot arc is started, a slight impulse will be
� Check the assembly of the torch consumables. If
felt in the torch handle. This occurrence is normal and
they are not properly in place, the machine will
is the mechanism which starts the plasma arc. This
not start. Make sure that the shield cup is hand
impulse can also be used to help troubleshoot a "no
tight. Do not use pliers or over tighten.
start" condition.
� 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 elec-
trode 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.
PRO-CUT 20
B-6 B-6
OPERATION
1. Occasionally an oxide layer may form over the tip
PROCEDURE RECOMMENDATIONS
of the electrode, creating an insulating barrier
between the electrode and nozzle. This will result
When properly used, plasma arc cutting is a very eco-
in the tripping of the Pro-Cut's safety circuit. When
nomical process. Improper use will result in a very
this happens turn the power off, remove the nozzle
high operating cost.
and electrode and use the electrode to rub against
General - In All Cases the inside bottom surface of the nozzle. This will
help remove any oxide buildup. Replace the noz-
zle, turn on the power and continue cutting. If the
� Follow safety precautions as printed throughout
safety circuit continues to trip after cleaning the
this operating manual and on the machine.
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
Thin Gauge Sheet and Material up to 1/4�:
the torch head and will degrade cut quality. Do not
Torch Standoff allow torch cable or body to contact hot surface.
2. To improve consumable life, here are some sug-
gestions that may be useful:
a. Make sure the air supply to the Pro-Cut is
clean and free of oil. Use several extra in line
filters if necessary.
b. Minimize dross buildup on the nozzle tip by
DRAG thru 1/16�
DRAG thru 1/16"
starting the cut from the edge of the plate
Standoff
Standoff
when possible.
� The nozzle may be dragged on the metal sur-
face, touching it lightly to the surface after c. Pierce cutting should be done only when nec-
piercing a hole. essary. If piercing, angle torch about 30° from
the plane perpendicular to the work piece,
� If piercing is required, slowly lower the torch at transfer the arc, then bring the torch perpen-
an angle of about 30° to blow the dross away dicular to the work and begin parallel move-
from the torch tip and slowly rotate the torch to ment.
a vertical position as the arc becomes deeper.
This process will blow a lot of molten metal and d. Reduce the number of pilot arc starts without
dross. Be careful! Blow the dross away from transferring to the work.
the torch, the operator and any flammable
objects. e. Reduce the pilot arc time before transferring
to the work.
� Where possible, start the cut from the edge of
the work piece. f. Set air pressure to recommended setting. A
higher or lower pressure will cause turbulence
� Keep moving! A steady speed is necessary. in the plasma arc, eroding the orifice of the
Do not pause. nozzle tip.
g. Use only Lincoln consumable parts. These
parts are patented and using any other
Suggestions for Extra Utility from
� replacement consumables may cause dam-
the PRO-CUT System: age to the torch or reduce cut quality.
WARNING
ELECTRIC SHOCK CAN KILL.
� Turn off machine at the disconnect
switch on the front of the machine
before tightening, cleaning or replacing
consumables.
----------------------------------------------------------------------------
PRO-CUT 20
C-1 C-1
ACCESSORIES
ALWAYS USE GENUINE LINCOLN GENERAL OPTIONS /
ELECTRIC ELECTRODES AND ACCESSORIES
VORTECHâ„? NOZZLES
The following options/accessories are available for
your PRO-CUT 20 from your local Lincoln Distributor.
� Only Genuine Lincoln Electric consumables yield
the best cutting performance for the PRO-CUT 20.
S22147-028 - VORTECH� nozzle with an .028� (0.7
� mm) Orifice
The patented VORTECHâ„? nozzle provides an
extra “kick� of swirl as the arc exits the nozzle which
S22149 - Electrode - replacement electrodes for cut-
improves cutting performance. No other nozzle has
ting.
this capability or can match its performance.
S22150 - Shield Cup - This shields the nozzle and
provides more visibility to the workpiece. Note the
shield cup does not prevent the torch tip from touching
the workpiece.
K1615 Series - PCT 20 Torches come in 15� and 25�
lengths in either hand held or mechanized versions.
PRO-CUT 20
D-1 D-1
MAINTENANCE
THERMAL PROTECTION
WARNING
ELECTRIC SHOCK can kill. Thermal Detection Devices protect the machine from
� Have an electrician install and service excessive operating temperatures. Excessive temper-
this equipment. atures may be caused by a lack of cooling air or oper-
� Turn the input power off at the fuse ating the machine beyond the duty cycle and output
box before working on equipment. rating. If excessive operating temperatures should
� Do not touch electrically hot parts. occur, the yellow thermal LED will light and the
� Prior to Performing preventative main- Detection Devices will prevent output voltage or cur-
tenance, perform the following capaci- rent.
tor discharge procedure to avoid elec-
tric shock. These Detection Devices 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
ROUTINE MAINTENANCE
left on and the reset should occur within a 15 minute
period. If the fan is not turning or the air intake louvers
1. Keep the cutting or gouging area and the area
were obstructed, then the power must be switched off
around the machine clean and free of combustible
and the fan problem or air obstruction must be cor-
materials. No debris should be allowed to collect
rected.
which could obstruct air flow to the machine.
A protection circuit is included to monitor the voltage
2. Every 6 months or so, the machine should be
across filter capacitors. In the event that the capacitor
cleaned with a low pressure airstream. Keeping the
voltage is too high, the protection circuit will prevent
machine clean will result in cooler operation and
output.
higher reliability. Be sure to clean these areas:
- Printed circuit boards and heat sinks
REPLACEMENT OF INTERNAL FUSES
- Power switch
The Pro-Cut 20 has additional protection provided to
3. Examine the sheet metal case for dents or break-
some circuits through internal fuses. For replacement
age. Repair the case as required. Keep the case in
of those fuses proceed as follows:
good condition to insure that high voltage parts are
protected and correct spacings are maintained. All
1. Turn off the power to the unit and remove the
external sheet metal screws must be in place to
input plug.
insure case strength and electrical ground continu-
ity.
2. Allow the machine to stand for 5 minutes to let
the input capacitors discharge.
4. Inspect the cable periodically for any slits or punc-
ture marks in the cable jacket. Replace if neces-
3. Remove the machine cover.
sary. Check to make sure that nothing is crushing
the cable and blocking the flow of air through the
4. Replace the blown fuse with a new 0.5A 500V
air tube inside. Also, check for kinks in the cable
slowblow fuse or 32A 400V fuse as appropriate.
periodically and relieve any so as not to restrict the
flow of air to the torch.
NOTE: If the fuse blows again after power is restored,
the cause could be an internal breakdown in
PERIODIC MAINTENANCE the power unit. In this case, take the unit to an
authorized Lincoln Field Service Shop.
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.
PRO-CUT 20
E-1 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.
Step 3. RECOMMENDED COURSE OF
Step 1. LOCATE PROBLEM (SYMPTOM).
ACTION
Look under the column labeled “PROBLEM
This column provides a course of action for
(SYMPTOMS)�. This column describes
the Possible Cause, generally it states to
possible symptoms that the machine may
contact you local Lincoln Authorized Field
exhibit. Find the listing that best describes
Service Facility.
the symptom that the machine is exhibiting.
If you do not understand or are unable to
Step 2. POSSIBLE CAUSE.
perform the Recommended Course of
The second column labeled “POSSIBLE
Action safely, contact you local Lincoln
CAUSE� lists the obvious external possibili-
Authorized Field Service Facility.
ties 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 connec-
tions before doing any troubleshooting.
----------------------------------------------------------------------------
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 20
E-2 E-2
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS POSSIBLE AREAS OF RECOMMENDED
(SYMPTOMS) MISADJUSTMENTS(S) COURSE OF ACTION
No Status indicators light and the fan 1. Check the input power to be sure
does not operate 5 seconds after the it is on.
power switch is turned on.
2. Check the power line fuses and
machine connection.
3. Disconnect input power at fuse
panel and check line switch conti-
nuity. Replace line switch if bad.
4. Check the fuses on the input
board.
No Status indicators light 5 seconds 1. Disconnect input power from the
after the power switch is turned on, machine. Check that connectors
but the fan operates. on harness between Control Bd.
and Power Bd. are properly seat-
ed.
2. Possible faulty Control Board.
If all recommended possible areas of
misadjustment have been checked
3. Possible faulty Power Board.
and the problem persists, Contact
your local Lincoln Authorized
Field Service Facility.
The safety light does not go out. 1. Check consumables - The safety
light lights when an unsafe condi-
tion exists either at the torch or
somewhere else within the sys-
tem.
2. Possible faulty Power 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 20
E-3 E-3
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS POSSIBLE AREAS OF RECOMMENDED
(SYMPTOMS) MISADJUSTMENTS(S) COURSE OF ACTION
The Pro-Cut powers up properly but 1. Press Purge button on the front of
there is no response when the trig- the Pro-Cut. If air does not flow,
ger is pulled and only the POWER then:
LED is lit. a. Reconnect Board may be
faulty.
b. The main gas solenoid assem-
bly may be faulty. Check or
replace.
c. Possible faulty Control board.
2. Remove the handles (or barrel) of
the torch and examine all the con-
nections. Pay attention to location
of electrode lead mounting at back
of torch head, broken trigger and
solenoid leads.
3. Check for proper trigger switch
operation. Remove the torch cable
If all recommended possible areas of
assembly from the Pro Cut and
misadjustment have been checked
test for continuity between 1 and 2
and the problem persists, Contact
at the Green 4 Pin Connector
your local Lincoln Authorized
when the trigger switch is
Field Service Facility.
depressed and no continuity when
the switch is not depressed.
Replace the trigger switch or torch
cable if defective.
4. 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 20
E-4 E-4
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS POSSIBLE AREAS OF RECOMMENDED
(SYMPTOMS) MISADJUSTMENTS(S) COURSE OF ACTION
When the trigger is pulled air begins 1. Check the torch consumables to be
to flow, but there is no pilot arc after sure they are not dirty or greasy,
at least 3 seconds. and are in good shape. Replace
the consumables if necessary.
2. Make sure the air pressure is set
at 65 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. Possible fault in Control board.
The air begins to flow and there is a 1. Check the torch consumables to
very brief arc that snaps out consis- be sure they are in tight, not dirty
tently with repeated trigger pulls. or greasy and in good shape.
Replace if necessary.
If all recommended possible areas of
2. Make sure the air pressure is set misadjustment have been checked
at 65 psi. and the problem persists, Contact
your local Lincoln Authorized
3. Possible fault in Control board. Field Service Facility.
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 65 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 20
E-5 E-5
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS POSSIBLE AREAS OF RECOMMENDED
(SYMPTOMS) MISADJUSTMENTS(S) COURSE OF ACTION
Pilot arc starts but will not transfer 1. Check work lead connection for
when brought near work. clean, secure connection.
2. Plasma will only cut conductive
material. Do not attempt to cut
fiberglass, plastic, rubber, PVC or
any other non-conductive material. If all recommended possible areas of
misadjustment have been checked
3. Make sure work piece is clean and the problem persists, Contact
and dry. Remove any scale, rust your local Lincoln Authorized
or dross. Field Service Facility.
4. Check all connections to Control
board.
5. 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 20
E-6 E-6
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
STATUS BOARD INDICATORS
SYMPTOM CHECK
The Air Low LED is lit 1. Make sure there is at least 80 psi connected to the gas connec-
tion at the back of the machine.
2. Press the Purge button and set the regulator to 55 psi. The pres-
sure 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.
The Safety LED is lit and steady 1. Turn the power OFF and then ON. 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. The input voltage is not within ±10% of rated values.
4. Possible faulty Control board.
PRO-CUT 20
F-1
PRO-CUT 20
DIAGRAMS
8-21-98B
M19031
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..
F-1
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G Do not touch electrically live parts or G Keep flammable materials away. G Wear eye, ear and body protection.
WARNING electrode with skin or wet clothing.
G Insulate yourself from work and
ground.
Spanish
G No toque las partes o los electrodos G Mantenga el material combustible G Protéjase los ojos, los oÃdos y el
AVISO DE bajo carga con la piel o ropa moja- fuera del área de trabajo. cuerpo.
da.
PRECAUCION G Aislese del trabajo y de la tierra.
French G Ne laissez ni la peau ni des vête- G Gardez à l’écart de tout matériel G Protégez vos yeux, vos oreilles et
ments mouillés entrer en contact inflammable. votre corps.
ATTENTION avec des pièces sous tension.
G Isolez-vous du travail et de la terre.
G Berühren Sie keine stromführenden
German G Entfernen Sie brennbarres Material! G Tragen Sie Augen-, Ohren- und Kör-
Teile oder Elektroden mit Ihrem perschutz!
WARNUNG Körper oder feuchter Kleidung!
G Isolieren Sie sich von den
Elektroden und dem Erdboden!
Portuguese
G Não toque partes elétricas e elec- G Mantenha inflamáveis bem guarda- G Use proteção para a vista, ouvido e
trodos com a pele ou roupa molha- dos. corpo.
ATENÇÃO da.
G Isole-se da peça e terra.
Japanese
Chinese
Korean
Arabic
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 HER-
STELLERS. DIE UNFALLVERHÃœTUNGSVORSCHRIFTEN DES ARBEITGEBERS SIND EBENFALLS ZU BEACHTEN.
G Keep your head out of fumes. G Turn power off before servicing. G Do not operate with panel open or
G Use ventilation or exhaust to
WARNING
guards off.
remove fumes from breathing zone.
Spanish
G Los humos fuera de la zona de res- G Desconectar el cable de ali- G No operar con panel abierto o
AVISO DE
piración. mentación de poder de la máquina guardas quitadas.
G Mantenga la cabeza fuera de los antes de iniciar cualquier servicio.
PRECAUCION
humos. Utilice ventilación o
ED
aspiración para gases.
French
G Débranchez le courant avant l’entre- G N’opérez pas avec les panneaux
G Gardez la tête à l’écart des fumées.
1 SED
G Utilisez un ventilateur ou un aspira- tien. ouverts ou avec les dispositifs de
ATTENTION
protection enlevés.
teur pour ôter les fumées des zones
de travail.
W ER
German
G Strom vor Wartungsarbeiten G Anlage nie ohne Schutzgehäuse
G Vermeiden Sie das Einatmen von
abschalten! (Netzstrom völlig öff- oder Innenschutzverkleidung in
Schweibrauch!
WARNUNG
G Sorgen Sie für gute Be- und
IM P
nen; Maschine anhalten!) Betrieb setzen!
Entlüftung des Arbeitsplatzes!
E SU
S
Portuguese
G Não opere com as tampas removidas. G Mantenha-se afastado das partes
G Mantenha seu rosto da fumaça.
SE Y
G Desligue a corrente antes de fazer
G Use ventilação e exhaustão para moventes.
ATENÇÃO
serviço. G Não opere com os paineis abertos
remover fumo da zona respiratória.
NT
G Não toque as partes elétricas nuas. ou guardas removidas.
RA
Japanese
AR
Chinese
W
Korean
Arabic
LEIA E COMPREENDA AS INSTRUÇÕES DO FABRICANTE PARA ESTE EQUIPAMENTO E AS PARTES DE USO, E SIGA AS
PRÃTICAS 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: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com
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