Lincoln Electric MARQUETTE AUTOPRO 20 Operator'S Manual Download Page 2

THANK YOU FOR SELECTING 

A QUALITY PRODUCT BY 

LINCOLN  ELEC  TRIC. 

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.

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.

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

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

KEEP YOUR HEAD OUT OF THE FUMES.

DON’T

get too close to the arc.

Use corrective lenses if necessary
to stay a reasonable distance
away from the arc.

READ

and obey the Safety Data

Sheet (SDS) and the warning label
that appears on all containers of
welding materials.

USE ENOUGH VENTILATION

or

exhaust at the arc, or both, to
keep the fumes and gases from 
your breathing zone and the general area.

IN A LARGE ROOM OR OUTDOORS

, natural ventilation may be

adequate if you keep your head out of the fumes (See below).

USE NATURAL DRAFTS

or fans to keep the fumes away 

from your face.

If you de velop unusual symptoms, see your supervisor. 
Perhaps the welding atmosphere and ventilation system 
should be checked.

WEAR CORRECT EYE, EAR & 
BODY PROTECTION

PROTECT

your eyes and face with welding helmet

properly fitted and with proper grade of filter plate
(See ANSI Z49.1).

PROTECT

your body from welding spatter and arc

flash with protective clothing including woolen
clothing, flame-proof apron and gloves, leather
leggings, and high boots.

PROTECT

others from splatter, flash, and glare

with protective screens or barriers.

IN SOME AREAS

, protection from noise may be appropriate.

BE SURE

protective equipment is in good condition.

Also, wear safety glasses in work area

AT ALL TIMES.

SPECIAL SITUATIONS

DO NOT WELD OR CUT

containers or materials which previously

had been in contact with hazardous substances unless they are
properly cleaned. This is extremely dangerous.

DO NOT WELD OR CUT

painted or plated parts unless special

precautions with ventilation have been taken. They can release
highly toxic fumes or gases.

Additional precautionary measures

PROTECT

compressed gas cylinders from excessive heat,

mechanical shocks, and arcs; fasten cylinders so they cannot fall.

BE SURE

cylinders are never grounded or part of an 

electrical circuit.

REMOVE 

all potential fire hazards from welding area.

ALWAYS HAVE FIRE FIGHTING EQUIPMENT READY FOR

IMMEDIATE USE AND KNOW HOW TO USE IT.

WARNING

CAUTION

Safety 01 of 04 - 5/16/2018

Summary of Contents for MARQUETTE AUTOPRO 20

Page 1: ...be increased by proper installation and thoughtful operation on your part DO NOT INSTALL OPER ATE OR REPAIR THIS EQUIP MENT WITHOUT READING THIS MANUAL AND THE SAFETY PRECAUTIONS CON TAINED THROUGHOU...

Page 2: ...A LARGE ROOM OR OUTDOORS natural ventilation may be adequate if you keep your head out of the fumes See below USE NATURAL DRAFTS or fans to keep the fumes away from your face If you develop unusual s...

Page 3: ...hot engine parts and igniting Do not spill fuel when filling tank If fuel is spilled wipe it up and do not start engine until fumes have been eliminated 1 d Keep all equipment safety guards covers and...

Page 4: ...m to ANSI Z87 I standards 4 b Use suitable clothing made from durable flame resistant material to protect your skin and that of your helpers from the arc rays 4 c Protect other nearby personnel with s...

Page 5: ...nt passing through lifting chains crane cables or other alternate circuits This can create fire hazards or overheat lifting chains or cables until they fail 6 h Also see item 1 c 6 I Read and follow N...

Page 6: ...imitations B 2 Controls and Settings B 2 Cutting Operations B 3 Check Air Quality B 3 Cutting with a Hand Torch B 3 B 4 Pilot Arc Discussion B 5 Torch Consumable Parts Selection B 5 __________________...

Page 7: ...Circuit Breaker or Fuse Size 20 AMPS 15 Amps 3 Conductor 14 AWG Type SJT or Hard Usage Input Cord Depth 16 in 406 mm Width 6 in 152 mm Height 12 in 305 mm Open Circuit Voltage 310 VDC For all plasma...

Page 8: ...good earth ground The work terminal ground does NOT ground the machine frame 2 Keep the work clamp isolated from other work clamps that have high frequency 3 If the work clamp cannot be isolated then...

Page 9: ...cylinder must have a pressure regulator Maximum psi from a nitrogen gas cylinder to the AUTOPRO 20 regulator should never exceed 150 psi 10 3 Bar Install a hose between the nitrogen gas cylin der regu...

Page 10: ...e cycle is determined by an arc called the pilot arc which is struck between the moveable electrode negative polarity and the torch nozzle positive polarity due to a short circuit between these two el...

Page 11: ...ate surface condi tion oil scale plate thickness preheat quench gas type gas flow rate and equipment may produce results different than those expected Some adjust ments to procedures may be necessary...

Page 12: ...at the work lead is clamped to the work piece before cutting Set the output current control knob at maximum position for higher cutting speed and less dross for mation Reduce the current if desired to...

Page 13: ...from the receptacle before assembling or disassembling torch parts or torch and lead assemblies If the machine does not reset or continues to trip consult the Troubleshooting Section Use the proper cu...

Page 14: ...ttently 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 st...

Page 15: ...ies Do not touch electrically hot parts 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 co...

Page 16: ...d with a filter for the compressed air and fitted with a manual drain for condensation Drain is located on the bottom of the filter Purge periodical ly to remove the water in the filter by opening the...

Page 17: ...COURSE OF ACTION This column provides a course of action for the Possible Cause generally it states to contact your local Lincoln Authorized Field Service Facility If you do not understand or are unab...

Page 18: ...5 Bar 2 Air filter or air line blocked torch blocked Replace filter cartridge Check that air line and torch leads are free of twists and kinks 1 Shield cup not properly installed on torch Check that...

Page 19: ...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...

Page 20: ...NOTES AUTOPRO 20...

Page 21: ...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 moja da Aislese del trabajo y...

Page 22: ...e Be und Entl ftung des Arbeitsplatzes Mantenha seu rosto da fuma a Use ventila o e exhaust o para remover fumo da zona respirat ria Turn power off before servicing Desconectar el cable de ali mentaci...

Page 23: ...2345 Murphy Blvd Gainesville GA 30504 TEL 866 236 0044 Copyright Lincoln Global Inc...

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