Lincoln Electric SVM165-A User Manual

POWER MIG

™

350MP

SERVICE MANUAL

SVM165-A

January. 2006

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.

For use with machine Code Number: 11147, 11309

For use with machine

• 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

• World's Leader in Welding and Cutting Products •

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FOR ENGINE powered equipment.

1.a. Turn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running.

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1.b.Operate engines in open, well-ventilated areas or vent the engine exhaust fumes outdoors.

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1.c. Do not add the fuel near an open flame welding arc or when the engine is running. Stop the engine and allow it to cool before refueling to prevent spilled fuel from vaporizing on contact with 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.

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1.d. Keep all equipment safety guards, covers and devices in position and in good repair.Keep hands, hair, clothing and tools away from V-belts, gears, fans and all other moving parts when starting, operating or repairing equipment.

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1.e. In some cases it may be necessary to remove safety

guards to perform required maintenance. Remove guards only when necessary and replace them when the maintenance requiring their removal is complete. Always use the greatest care when working near moving parts.

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1.f. Do not put your hands near the engine fan. Do not attempt to override the governor or idler by pushing on the throttle control rods while the engine is running.

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1.g. To prevent accidentally starting gasoline engines while turning the engine or welding generator during maintenance work, disconnect the spark plug wires, distributor cap or magneto wire as appropriate.

SAFETY

ARC WELDING 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 W117.2-1974. A Free copy of “Arc Welding Safety” booklet E205 is available from the Lincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.

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

WARNING

ELECTRIC AND MAGNETIC FIELDS may be dangerous

2.a. Electric current flowing through any conductor causes localized Electric and Magnetic Fields (EMF). Welding current creates EMF fields around welding cables and welding machines

2.b. EMF fields may interfere with some pacemakers, and welders having a pacemaker should consult their physician before welding.

2.c. Exposure to EMF fields in welding may have other health effects which are now not known.

2.d. All welders should use the following procedures in order to minimize exposure to EMF fields from the welding circuit:

2.d.1.

Route the electrode and work cables together - Secure them with tape when possible.

2.d.2. Never coil the electrode lead around your body.

2.d.3. Do not place your body between the electrode and

work cables. If the electrode cable is on your right side, the work cable should also be on your right side.

2.d.4. Connect the work cable to the workpiece as close as

possible to the area being welded.

2.d.5. Do not work next to welding power source.

1.h. To avoid scalding, do not remove the radiator pressure cap when the engine is hot.

CALIFORNIA PROPOSITION 65 WARNINGS

Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm.

The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

The Above For Diesel Engines

The Above For Gasoline Engines

SAFETY

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ARC RAYS can burn.

4.a. Use a shield with the proper filter and cover plates to protect your eyes from sparks and the rays of the arc when welding or observing open arc welding. Headshield and filter lens should conform 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 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.

ELECTRIC SHOCK can kill.

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

gloves to insulate hands.

3.b. Insulate yourself from work and ground using dry insulation. Make certain the insulation is large enough to cover your full area of physical contact with work and ground.

In addition to the normal safety precautions, if welding must be performed under electrically hazardous conditions (in damp locations or while wearing wet clothing; on metal structures such as floors, gratings or scaffolds; when in cramped positions such as sitting, kneeling or lying, if there is a high risk of unavoidable or accidental contact with the workpiece or ground) use the following equipment:

• Semiautomatic DC Constant Voltage (Wire) Welder.

• DC Manual (Stick) Welder.

• AC Welder with Reduced Voltage Control.

3.c. In semiautomatic or automatic wire welding, the electrode, electrode reel, welding head, nozzle or semiautomatic welding gun are also electrically “hot”.

3.d. Always be sure the work cable makes a good electrical connection with the metal being welded. The connection should be as close as possible to the area being welded.

3.e. Ground the work or metal to be welded to a good electrical (earth) ground.

3.f.

Maintain the electrode holder, work clamp, welding cable and welding machine in good, safe operating condition. Replace damaged insulation.

3.g. Never dip the electrode in water for cooling.

3.h. Never simultaneously touch electrically “hot” parts of electrode holders connected to two welders because voltage between the two can be the total of the open circuit voltage of both welders.

3.i. When working above floor level, use a safety belt to protect yourself from a fall should you get a shock.

3.j. Also see Items 6.c. and 8.

FUMES AND GASES can be dangerous.

5.a.Welding may produce fumes and gases hazardous to health. Avoid breathing these fumes and gases.When welding, keep your head out of the fume. Use enough ventilation and/or exhaust at the arc to keep

fumes and gases away from the breathing zone. When

welding with electrodes which require special ventilation such as stainless or hard facing (see instructions on container or MSDS) or 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.

5.b.

Do not weld 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.

5.c. Shielding gases used for arc welding can displace air and cause injury or death. Always use enough ventilation, especially in confined areas, to insure breathing air is safe.

5.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. MSDS forms are available from your welding distributor or from the manufacturer.

5.e. Also see item 1.b.

SAFETY

iii

POWER MIG 350MP

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FOR ELECTRICALLY powered equipment.

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

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

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

CYLINDER may explode if damaged.

7.a. Use only compressed gas cylinders containing the correct shielding 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.

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

7.c. Cylinders should be located:

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

physical damage.

•A safe distance from arc welding or cutting operations and

any other source of heat, sparks, or flame.

7.d. Never allow the electrode, electrode holder or any other electrically “hot” parts to touch a cylinder.

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

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

7.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.

WELDING SPARKS can cause fire or explosion.

6.a.

Remove fire hazards from the welding area.

If this is not possible, cover them to prevent

the welding sparks from starting a fire.

Remember that welding sparks and hot materials from welding can easily go through small cracks and openings to adjacent areas. Avoid welding near hydraulic lines. Have a fire extinguisher readily available.

6.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.

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

6.d. Do not heat, cut or weld 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).

6.e. Vent hollow castings or containers before heating, cutting or welding. They may explode.

6.f.

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

6.g. Connect the work cable to the work as close to the welding area as practical. Work cables connected to the building framework or other locations away from the welding area increase the possibility of the welding 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.

6.h. Also see item 1.c.

POWER MIG 350MP

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SAFETY

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.

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.

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 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.

6 6

MASTER TABLE OF CONTENTS FOR ALL SECTIONS

Page

Safety.................................................................................................................................................i-iv

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

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

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

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

Theory of Operation..............................................................................................................Section E

Troubleshooting and Repair ................................................................................................Section F

How to Use Troubleshooting Guide............................................................................................F-2

Troubleshooting Guide................................................................................................................F-4

Test Procedures ........................................................................................................................F-14

Replacement Procedures .........................................................................................................F-36

Electrical Diagrams ..............................................................................................................Section G

Parts Manual......................................................................................................................P512 Series

POWER MIG 350MP

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A-1 A-1

TABLE OF CONTENTS

- INSTALLATION SECTION -

INSTALLATION......................................................................................................................Section A

Technical Specifications .............................................................................................................A-2

Safety Precautions......................................................................................................................A-3

Input Supply Connection Diagram..............................................................................................A-4

Gun and Cable Installation..........................................................................................................A-5

POWER MIG 350MP

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A-2

INSTALLATION

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Input Voltage/ 230Amps @ 300Amps @ 75°C Copper Wire Fuse

Frequency (Hz) 29 Volts 32 Volts AWG (IEC) or

(100% Duty Cycle) (60% Duty Cycle)

Sizes (MM2)

Breaker Size

208/60* 48 A 72 A 6 (16 mm

) 90 A 230/60 43 A 62 A 6 (16 mm2) 80 A 460/60 22 A 31 A 10 (6 mm2) 50 A 575/60 17 A 25 A 12 (2.5 mm2) 35 A

NOTE: Use #10 AWG Grounding Wire *For 208V Input ONLY: The duty Cycle Rating at 300 Amps is 40%

TECHNICAL SPECIFICATIONS – POWER MIG 350MP

INPUT – SINGLE PHASE ONLY

RATED OUTPUT

OUTPUT

RECOMMENDED INPUT WIRE AND FUSE SIZES - SINGLE PHASE

Height

Width Depth Weight

31.79 in 18.88 in 38.78 in 255 Ibs 808 mm 480 mm 985 mm 116 kg

PHYSICAL DIMENSIONS

Wire Speed 50 – 700 IPM (1.27 – 17.8 m/minute)

WIRE SPEED RANGE

Standard Voltage/Frequency

Input Current @ 230Amp Rated Output Input Current @ 300 Amp Rated Output

208/230/460/575/60 Hz 48/43/22/17 Amps 72/62/31/25 Amps

Input

Voltage Duty Cycle

Amps Volts at Rated Amperes

208 40% 300 Amps 32 Volts 230/460/575 60% 300 Amps 32 Volts 208/230/460/575 100% 230Amps 29 Volts

Welding Current Range (Continuous)

Maximum Open Circuit Voltage Welding Voltage Range

5 – 350 Amps 67 Volts 10-45 Volts

POWER MIG 350MP

A-3

INSTALLATION

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ONLY QUALIFIED PERSONNEL SHOULD INSTALL, USE OR SERVICE THIS EQUIPMENT.

UNCRA TING THE POWER MIG 350MP

Cut banding and lift off cardboard carton. Cut banding holding the machine to the skid. Remove foam and corrugated packing material. Untape accessories from Gas Bottle Platform. Unscrew the two wood screws (at the Gas Bottle Platform) holding the machine to the skid. Roll the machine off the skid assembly.

LOCATION

Locate the welder in a dry location where there is free circulation of clean air into the louvers in the back and out the front. A location that minimizes the amount of smoke and dirt drawn into the rear louvers reduces the chance of dirt accumulation that can block air passages and cause overheating.

INPUT POWER, GROUNDING AND CONNECTION DIAGRAMS

1. Before starting the installation, check with the local power company if there is any question about whether your power supply is adequate for the voltage, amperes, phase, and frequency specified on the welder nameplate. Also be sure the planned installation will meet the U.S. National Electrical Code and local code requirements. This welder may be operated from a single phase line or from one phase of a two or three phase line.

2. The Power MIG 350MP is supplied connected for

230 Volt Input. If the welder is to be operated on another voltage, it must be reconnected according to the instructions in Figure A.1

Read entire installation section before starting installation.

SAFETY PRECAUTIONS

POWER MIG 350MP

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.

• Do not use AC welder if your clothing, cloves or work area is damp or if working on, under or inside work piece.

Use the following equipment:

- Semiautomatic DC constant voltage (wire) welder.

- DC manual (stick) welder.

- AC welder with reduced voltage control.

• Do not operate with panels removed.

• Disconnect input power before servicing.

FUMES AND GASES can be dangerous.

• Keep your head out of fumes.

• Use ventilation or exhaust to remove fumes from breathing zone and general area.

WELDING SPARKS can cause fire or explosion.

• Keep flammable material away.

• Do not weld on closed containers.

ARC RAYS can burn eyes and skin.

• Wear eye, ear and body protection.

Observe all safety information throughout this manual.

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WARNING

A-4

INSTALLATION

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FIGURE A.2 — RECEPTACLE DIAGRAM

CONNECT TO A SYSTEM GROUNDING WIRE. SEE THE UNITED STATES NATIONAL ELECTRICAL CODE AND/OR LOCAL CODES FOR OTHER DETAILS AND MEANS FOR PROPER GROUNDING.

CONNECT TO HOT WIRES OF A THREE-WIRE, SINGLE PHASE SYSTEM OR TO ONE PHASE OF A TWO OR THREE PHASE SYSTEM.

3. The Power MIG is shipped with a 10ft.(3.05m) input cable and plug connected to the welder. Using the instructions in Figure A.2, have a qualified electrician connect the receptacle or cable to the input power lines and the system ground per the U.S. National Electrical Code and any applicable local codes. See “Technical Specifications” at the beginning of this chapter for proper wire sizes. For long runs over 100ft. (30.48m), larger copper wires should be used. Fuse the two hot lines with super lag type fuses as shown in the following diagram. The center contact in the receptacle is for the grounding connection. A green wire in the input cable connects this contact to the frame of the welder. This ensures proper grounding of the welder frame when the welder plug is inserted into the receptacle.

FIGURE A.1 — TRIPLE VOLTAGE MACHINE INPUT CONNECTIONS

POWER MIG 350MP

A-5

INSTALLATION

GUN AND CABLE INSTALLATION

A-5

GUN & CABLE ASSEMBLY INSTALLED INTO THE POWER MIG

A Magnum 300 gun and 15Ft.(4.6m) cable (12Ft.(3.7m) for Codes 11000 and below) are provided with the Power MIG 350MP. A Magnum cable liner for .035-.045" (0.9-1.2 mm) electrode and contact tips for .035” (0.9mm) and .045” (1.2mm) are included for 15Ft..

WARNING

Turn the welder power switch off before installing gun and cable.

LINER INSTALLATION AND TRIMMING INSTRUCTION (SEE FIGURE A.3)

1. Remove the gas nozzle.

2. Remove the gas diffuser from the gun tube. If gas diffuser contains a small set screw, loosen the set screw.

3. Lay gun and cable out straight on a flat surface. Loosen set screw of the connector on the back end of the gun.

4. Insert the untrimmed Liner into the back end of the gun.

5. Seat Liner bushing into back of gun. Secure Liner by tightening set screw. Do not install the gas diffuser at this time.

6. Lay the cable straight and trim Liner to 9/16”. Remove burrs.

7. Secure the gas diffuser into the tube.

8. Tighten the set screw against the Liner.

CAUTION

1. Unscrew knurled screw on the drive unit front end (inside wire feed compartment) until tip of screw no longer protrudes into gun opening as seen from front of machine.

2. Insert the male end of gun cable into the female casting through opening in front panel. Make sure connector is fully inserted and tighten knurled screw.

3. Connect the gun trigger connector from the gun and cable to the mating receptacle inside the compartment located above the gun connection made in step 2 above. Make sure that the key ways are aligned, insert and tighten retaining ring.

SHIELDING GAS

(For Gas Metal Arc Welding Processes) Customer must provide cylinder of appropriate type

shielding gas for the process being used. A gas flow regulator, for CO2or Argon blend gas, and

an inlet gas hose are factory provided with the Power MIG 350MP.

WARNING

CYLINDER may explode if damaged.

• Gas under pressure is explosive. Always keep gas cylinders in an upright position and always keep chained to undercarriage or stationary support. See American National Standard Z-49.1, “Safety in Welding and Cutting” published by the American Welding Society.

Install shielding gas supply as follows:

1. Set gas cylinder on rear platform of Power MIG 350MP. Hook chain in place to secure cylinder to rear of welder.

This screw should only be gently tightened. Over tightening will split or collapse the liner and cause poor wire feeding.

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

FIGURE A.3

POWER MIG 350MP

2. Remove the cylinder cap. Inspect the cylinder valves and regulator for damaged threads, dirt, dust, oil or grease. Remove dust and dirt with a clean cloth.

A-6

POWER MIG 350MP

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INSTALLATION

DO NOT ATTACH THE REGULATOR IF OIL, GREASE OR DAMAGE IS PRESENT! Inform your

gas supplier of this condition. Oil or grease in the presence of high pressure oxygen is explosive.

3. Stand to one side away from the outlet and open the cylinder valve for an instant. This blows away any dust or dirt which may have accumulated in the valve outlet.

Be sure to keep your face away from the valve outlet when “cracking” the valve.

4. Attach the flow regulator to the cylinder valve and tighten the union nut(s) securely with a wrench.

NOTE: If connecting to 100% CO2cylinder, insert regulator adapter between regulator and cylinder valve. If adapter is equipped with a plastic washer, be sure it is seated for connection to the CO2cylinder.

5. Attach one end of the inlet gas hose to the outlet fitting of the flow regulator, the other end to the Power MIG 350MP rear fitting, and tighten the union nuts securely with a wrench.

6. Before opening the cylinder valve, turn the regulator adjusting knob counterclockwise until the adjusting spring pressure is released.

7. Standing to one side, open the cylinder valve slowly a fraction of a turn. When the cylinder pressure gauge pointer stops moving, open the valve fully.

Never stand directly in front of or behind the flow regulator when opening the cylinder valve. Always stand to one side.

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

8. The flow regulator is adjustable. Adjust it to the flow rate recommended for the procedure and process being used before making the weld.

WARNING

POWER MIG 350MP

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B-1

TABLE OF CONTENTS

- OPERATION SECTION -

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

Definitions of Welding Modes.....................................................................................................B-2

Product Description....................................................................................................................B-3

Controls and Settings ..........................................................................................................B-3/B-4

Setting and Configuring..............................................................................................................B-5

Multi-Process Panel Functions ...................................................................................................B-6

Arc Control..................................................................................................................................B-7

Wire Drive Roll ............................................................................................................................B-8

Changing Drive and Idle Roll Sets ..............................................................................................B-9

Feeding Wire Electrode.............................................................................................................B-10

Pulse Welding ...........................................................................................................................B-11

Pulse-On-Pulse.........................................................................................................................B-12

Power Mode..............................................................................................................................B-13

POWER MIG 350MP

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B-2

OPERATION

COMMON WELDING ABBREVIATIONS

WFS

• Wire Feed Speed

• Constant Current

• Constant Voltage

GMAW (MIG)

• Gas Metal Arc Welding

GMAW-P (MIG)

• Gas Metal Arc Welding-(Pulse)

GMAW-PP (MIG)

• Gas Metal Arc Welding-(Pulse-on-Pulse)

GTAW (TIG)

• Gas Tungsten Arc Welding

SMAW (STICK)

• Shielded Metal Arc Welding

FCAW (INNERSHIELD)

• Flux Core Arc Welding

Read entire Operation section before operating the Power MIG 350MP.

ELECTRIC SHOCK can kill.

• Do not touch electrically live parts or electrode with skin or wet clothing. Insulate yourself from work and ground.

• Always wear dry insulating gloves.

FUMES AND GASES can be dangerous.

• Keep your head out of fumes.

• Use ventilation or exhaust to remove fumes from breathing zone.

WELDING SPARKS can cause fire or explosion.

• Keep flammable material away.

• Do not weld on closed containers.

ARC RAYS can burn eyes and skin.

• Wear eye, ear and body protection.

Observe all safety information throughout this manual.

DEFINITIONS OF WELDING MODES

NON-SYNERGIC WELDING MODES

• A Non-synergic welding mode requires all welding

process variables to be set by the operator.

SYNERGIC WELDING MODES

• A Synergic welding mode offers the simplicity of

single knob control. The machine will select the correct voltage and amperage based on the wire feed speed (WFS) set by the operator.

WARNING

POWER MIG 350MP

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B-3

OPERATION

PRODUCT DESCRIPTION

The Power MIG 350MP is a complete semiautomatic multi-process DC arc welding machine offering CV and CC DC welding. It is rated for 350MP amps, 32 volts at a 60% duty cycle. The standard machine is equipped to weld CC-Stick, CC-GTAW, CV-FCAW, and synergic and non-synergic CV-GMAW / GMAW-P and Pulse-on-Pulse and Power Mode welding processes. See the descriptions for Pulse on Pulse™and Power Mode welding processes later in this section.

Mode #5 and mode #6 are non-synergic CV GMAW modes for bare and flux cored wires, respectively. In these modes, the user presets the wire feed speed (WFS) on the left meter and the welding voltage on the right. These two settings are independent; that is, if the WFS is changed the voltage will remain constant, or vice versa.

All of the other mode numbers designated as "CV" are synergic. Again, WFS is shown on the left meter and voltage is shown on the right meter. However, in using these modes, the WFS is preset and the voltage is preset only once. Now, when the WFS is changed, the voltage will change with it, so that the arc appearance and arc length will stay the same without the necessity to re-adjust the voltage.

The modes shown as "GMAW-P" or " GMAW-PP" are all synergic pulsed modes. In these modes WFS is shown on the left meter and "Trim" is shown on the right meter. The user adjusts WFS to obtain an arc with the correct arc energy for the material thickness being welded. The Trim, which is adjustable from values of –1.5 to 0 (OFF) and up to +1.5 controls the arc length. Higher values of Trim give longer arc lengths. Once the user has adjusted the Trim for one WFS, the power supply will synergically change many variables so that, as the WFS is changed, the arc length and arc appearance will remain the same. The synergic modes are usable with both push and push – pull torches, as described later in this Manual. When using a spool gun, however, although the synergic pulsed modes are still accessible, they must be used in a non-synergic manner as described in the Accessory Section.

The digital microcomputer based control system allows easy and accurate adjustment of weld parameters through the multi-process panel located on the front of the machine. The Power MIG 350MP is equipped with a 6-pin and 7-pin connector to allow operation of a push-pull gun for feeding aluminum wires, a spool gun, remotes, and a foot amptrol.

Other features

Optional kits are available for push-pull welding, spool gun operation, push feeding of 3/64 aluminum with the standard Power MIG 350MP gun and wire feeder. A Dual Cylinder Mounting Kit is also offered.

CONTROLS AND SETTINGS

(See Figure B.1)

1. WIRE FEED SPEED (WFS) / AMP METER - This meter displays either the WFS or current value (Amps) depending on the status of the machine. Located below the display is the text "WFS" and "Amps." An LED light is illuminated to the left of one of these units to indicate the units of the value displayed on the meter.

• Prior to CV operation, the meter displays the

desired preset WFS value.

• Prior to CC-Stick and CC-GTAW operation, the

meter displays the preset current value.

• During Welding, the meter displays actual average

amps.

• After welding, the meter holds the actual current

value for 5 seconds. During this time, the display is blinking to indicate that the machine is in the "Hold" period. Output adjustment while in the "Hold" period results in the "prior to operation" characteristics stated above.

• After the 5 second "Hold" period, the meter displays the set WFS (CV modes) or Amp (CC modes) value.

FIGURE B.1

POWER MIG 350MP

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5. MULTI-PROCESS PANEL - This panel enables selection of weld modes as well as adjustment of certain weld parameters within each weld mode.

The eight discrete LED’s are used to identify which selection will be shown on the display. The possible selections are:

• Weld Mode (Process selection choices)

• Preflow / Postflow

• Run-In

• Start

• Arc Control

• Crater

• Burnback

• Spot Only one LED will be illuminated at any time. The Weld Mode attribute will always be a valid selection (the other attributes may not be available in all processes).

5A. SELECT Toggle Switch

• This switch toggles through the 8 selections detailed above the switch.

• A red LED is located next to each possible selection

and is illuminated when that choice can be changed.

5B. Display Meter

• This meter displays the active weld mode (a set of

weld parameters that have been determined to provide the recommended results for a particular welding process) when the “Weld Mode” LED is illuminated or when any one of the other seven LED’s is illuminated the meter indicates what value that welding parameter has been set to.

5C. SET Toggle Switch

• This switch adjusts (up or down) the value shown on

the display meter. When the WELD MODE LED is illuminated, this switch is changing the weld mode of the machine. The most commonly used modes are displayed in the chart on the right half of the MultiProcess Panel.

If the LED next to a weld parameter (Preflow/Postflow, Run-In, Start, etc.) is illuminated, the SET switch will adjust the setting of that specific weld parameter. The setting is shown on the display meter.

6. ON/OFF POWER SWITCH

B-4

OPERATIONS

}

Choice of weld parameters that can be adjusted. Complete descriptions of each parameter are found later in this section.

2. VOLT / TRIM METER - This meter displays either the voltage or trim value depending on the status of the machine. Located below the display is the text "Volts" and "Trim." An LED light is illuminated to the left of one of these in order to indicate the units of the value displayed in the meter.

CV Processes

• Prior to GMAW and FCAW operation, the meter displays the desired preset Voltage value.

• Prior to synergic GMAW-P and GMAW-PP operation, the meter displays the desired preset Trim value. Trim adjusts the synergic default voltage as a percentage of that voltage. A trim value of 1 is the default and results in the recommended voltage setting for a given wire feed speed. Adjusting trim to a value of .95, adjusts the voltage to 95% of the recommended voltage.

• During Welding, the meter displays actual average volts.

• After welding, the meter holds the actual voltage value for 5 seconds. During this time , the display is blinking to indicate that the machine is in the "Hold" period. Output adjustment while in the "Hold" period results in the "prior to operation" characteristics stated above.

• After the 5 second "Hold" period, the meter displays the set Voltage (GMAW, FCAW) or Trim (GMAW-P) value.

CC Processes

• The meter displays the status of the output.

• When output is enabled, the meter will display "ON."

• When there is no output, the meter will display "OFF."

3. OUTPUT CONTROLS - The Power MIG 350MP has 2 encoder knobs to adjust weld parameters.

• Each encoder changes the displayed value of the meter located directly above that encoder.

• In CC-GTAW modes, the left encoder sets the maximum welding current. Full depression of a foot or hand amptrol results in the preset level of current.

• In CC-Stick and CC-GTAW, the right encoder activates and de-activates the output. Turning the encoder clockwise enables the output if not using a remote trigger device. To de-energize the output, turn the encoder counter-clockwise. The display above will indicate the "ON" or "OFF" status of the output.

4. THERMAL - This status light illuminates when the power source has been driven into thermal overload.

POWER MIG 350MP

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B-5

OPERATION

SETTING AND CONFIGURING THE POWER MIG 350MP FOR WELDING

• Check that the electrode polarity is correct for the process and turn the Power Switch to the "ON" position. After the "boot-up" period (approximately 20 seconds), the Power MIG 350MP will default to the last preset weld mode that was active when the machine was powered down. The Multi-Process Panel defaults with the "Weld Mode" active.

• Toggle the SET switch to the desired "Weld Mode" operation. The Multi-Process Meter displays a weld mode number corresponding to a CC or CV welding process as detailed by the chart on the right side of the panel. In the example shown in Figure B.2 “3” is displayed above the SET switch. This means that the machine is set for CCGTAW (TIG) welding.

• Toggle the SELECT switch to activate the "weld parameters" for the selected weld mode.

• Set each parameter using the SET switch to adjust the parameter displayed on the display meter.

NOTE: If the LED next to the weld parameter is flashing, the WFS/AMP and/or the Volt/Trim values can also be adjusted for that parameter using the control knobs below each display meter. An LED below each of the displays will also be flashing to indicate which value is adjustable.

The Table B.1 shows which weld parameters are adjustable for a given weld mode. The weld parameters are detailed later in this section.

PREFLOW / RUN IN START ARC CONTROL CRATER BURNBACK SPOT

POSTFLOW CC-STICK ----- ----- Yes Yes ----- ----- ----CC-GTAW Yes ----- Yes ----- ----- ----- ----CV-FCAW ----- Yes Yes Yes Yes Yes Yes CV-GMAW Yes Yes Yes Yes Yes Yes Yes CV-GMAW-P

Yes Yes Yes Yes Yes Yes Yes

POWER Yes Yes Yes Yes Yes Yes Yes

FIGURE B.2

TABLE B.1

POWER MIG 350MP

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B-6

OPERATION

MULTI-PROCESS PANEL FUNCTIONS

Weld Mode

Setting the Weld Mode is selecting the proper program from the ones available in the machine’s memory for a particular welding application. The table on the right side of the front panel (See Figure B.2) gives information on the different programs available in this machine. It describes the type of process (CV, CC, synergic GMAW), type of metal (mild steel, stainless steel, aluminum), type of shielding gas and size of electrode recommended for a particular mode.

The Weld Mode selection is enabled by toggling the SELECT switch until the LED next to Weld Mode is lit. A Weld Mode number will be displayed on the display meter. Toggling the SET switch up or down will increase or decrease the WELD MODE number displayed. The machine will change to the selected weld mode after two seconds of SET switch inactivity. If the SELECT switch is changed before two seconds of SET switch inactivity, the machine will not change modes. The last active Weld Mode will be saved at power down so that it will be selected with the next power up of the machine.

Preflow / Postflow

• The Preflow setting allows a time to be selected for shielding gas to flow after the trigger is pulled and prior to wire feeding and establishing an arc.

• The Postflow setting allows a time to be selected for shielding gas to continue to flow after the trigger is released and output current is turned off.

• The Preflow timer will be selected by toggling the SELECT switch until the LED next to PREFLOW /POSTFLOW is lit. The display meter will read Pre. The present Preflow time will be displayed and can be changed by positioning the SET switch up or down.

• The Postflow timer will be selected by pressing down the SELECT switch an additional time. The LED next to PREFLOW / POSTFLOW will remain lit; but the display meter will now read Pos. The present Postflow time will be displayed and can be changed by positioning the SET switch up or down.

• The default value for both Preflow and Postflow is "OFF" (0 seconds).

• Preflow can be adjusted from 0 to 2.5 seconds in 0.1 second increments.

• Postflow can be adjusted from 0 to 10.0 seconds in 0.1 second increments.

Run-In

• The Run-In function offers the ability to set a wire feed speed, from trigger until an arc is established, that is independent of the Welding or Start wire feed speed. Setting a Run-In WFS lower than the welding WFS avoids stubbing problems when starting the arc.

• Run-In is selected by toggling the SELECT switch until the LED next to RUN-IN is lit. A Run-In WFS may be adjusted using the SET switch on the Multi-Process Panel. The Display meter on the Multi-Process Panel will indicate the run-in speed. Do not use the Output Control Knob on the upper case front to adjust the WFS. This will change the welding WFS displayed in the meters on the upper case front.

• The default value for Run-In is "OFF."

• Run-In speed is adjustable from 50 ipm to 150 ipm (Inches per Minute).

Start Procedure

This machine provides the option of setting a Starting Procedure to start the weld, and from there, to ramp to the welding procedure over a specified amount of time. Typically starting on a higher starting procedure than the welding procedure is known as a “Hot Start”. Setting a starting procedure lower than the welding procedure is known as a “Cold Start”.

For SMAW (Stick) welding setting a “Hot Start” helps to minimize stubbing the electrode.

For GTAW (TIG) welding setting a “Cold Start” minimizes burn-through of thin materials when not using a manual amperage control.

For Wire Feed welding using a start procedure can help improve starting characteristics. A good example is when welding aluminum. Aluminum’s high thermal conductivity results in heat spreading around the plate very fast. Therefore more energy is necessary at the very beginning to heat up the starting point of the weld. Once the welding begins, it is not necessary to give this extra heat anymore so a ramp down to the welding procedure is necessary.

To set a Start Procedure begin by using the SELECT switch to select the Start LED. Using the SET switch, enter the desired Start ramp time duration (its available values range from 0.01 seconds to 0.50 seconds in increments of 0.01 seconds or the default value of OFF). This value will be displayed on the digital meter of the multiprocess panel (See Figure B.2).

After setting the Start time also set the WFS, and voltage/trim. The way to know what information needs to be entered is to look for flashing LED’s. If an LED is flashing that parameter value needs to be entered.

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B-7

OPERATION

POWER MIG 350MP

Arc Control (See Table B.2)

There are no specific unit values offered because the setting of this feature largely depends upon operator preference. Arc Control has a different effect on the character of the arc depending upon the welding process applied.

In SMAW (STICK mode), arc control adjusts the arc force. It can be set to the lower range for a soft and less penetrating arc characteristic (negative numeric values) or to the higher range (positive numeric values) for a crisp and more penetrating arc. Normally, when welding with cellulosic types of electrodes (E6010, E7010, E6011), a higher energy arc is required to maintain arc stability. This is usually indicated when the electrode sticks to the work-piece or when the arc pops-out during manipulative technique. For low hydrogen types of electrodes (E7018, E8018, E9018, etc.) a softer arc is usually desirable and the lower end of the Arc Control suits these types of electrodes. In either case the arc control is available to increase or decrease the energy level delivered to the arc.

In GMAW-S, the short-circuiting mode of metal transfer, the Arc Control features the ability to increase or decrease the energy level at the arc. Setting the arc control from 1 to 10 decreases energy, and setting the Arc Control from 0 to –10 increases the energy delivered to the arc.

Solid carbon steel electrodes in a range from .025"- .045" (.6 mm – 1.1 mm) are nominally used, and the shielding gas blend for GMAW-S is usually 100% carbon dioxide or a blend of argon and carbon dioxide. The Arc Control in this scenario is set to control the droplet size and more pinch is added (increasing pinch reduces energy to the arc) to achieve the "bacon frying" sound associated with this mode of metal transfer.

Carbon steel electrodes employed in GMAW-S usually perform best when the droplet size is regulated by pinch to reduce the droplet size transferred with each short-circuit event.

When welding with solid stainless steel types of electrodes it is usually desirable to increase the energy delivered to the arc. High percentage argon blends with a 2 % addition of oxygen or a three part shielding gas blend comprised of 90% Helium + 7.5% Argon + 2.5 % carbon dioxide are usually employed. The added energy is associated, in this scenario, with increasing the inductance (negative numeric values). By adding to the energy level the weld bead appearance improves – spatter levels decrease and wetting action at the toes of a fillet weld increases. The arc is softer with the higher inductance setting and the arc lends itself to faster travel speed.

In GMAW-P, the pulsed spray mode of metal transfer, the Arc Control is, once again, used to increase and decrease the focus of the energy delivered to the arc. Increasing the setting in the range of +1 to +10 results in an increase in pulsed frequency, and the effect is to narrow the arc cone and concentrate the available energy to a smaller area. Decreasing the Arc Control setting from –1 to –10 results in a reduction of pulsed frequency – the result is a broader arc cone, which creates a wider weld bead.

Important to note here is that if a component of a pulsed waveform is increased, then another must be decreased. Adding pulsed frequency through an increase in the Arc Control setting, then also results in a proportional decrease in background current. If this were not the case, then the arc would become too long, with too much energy, and the arc would be unusable.

PROCESS ARC SETTING APPLICATION AND

CONTROL RESULT SYNONYM

SMAW (STICK) Arc Force Lower (-1 to -10) for Minus settings are soft

low hydrogen types of and buttery for low electrodes. Higher (+1 hydrogen electrodes. to +10) for cellulosic Plus settings are harsh and other types. and digging for other

types of electrodes.

GMAW – S (Short Inductance or Setting -1 to -10 for The minus settings circuiting metal Pinch Control softer higher energy result a more fluid transfer arc. Setting +1 to +10 puddle and larger

for a crisper lower droplet size. The postive energy arc. settings reduce the

droplet size and reduce energy to the arc.

GMAW – P (Pulsed Pulsed frequency Minus settings reduces Wider arc cone and

spray metal transfer) control frequency. Plus weld bead. Narrower

settings increase arc cone and narrower frequency. weld bead.

Pulse – on –Pulse™ Pulsed frequency Minus settings result in Minus settings result in

(Aluminum Only) array control lower array frequency a wider bead with more

and the plus settings distinct ripples. Plus increase the array settings narrow the frequency. resultant bead and the

ripples are less distinct.

PROCESS ARC SETTING APPLICATION AND

CONTROL RESULT SYNONYM

SMAW (STICK) Arc Force Lower (-1 to -10) for Minus settings are soft

low hydrogen types of and buttery for low electrodes. Higher (+1 hydrogen electrodes. to +10) for cellulosic Plus settings are harsh and other types. and digging for other

types of electrodes.

GMAW – S (Short Inductance or Setting -1 to -10 for The minus settings circuiting metal Pinch Control softer higher energy result a more fluid transfer arc. Setting +1 to +10 puddle and larger

for a crisper lower droplet size. The postive energy arc. settings reduce the

droplet size and reduce energy to the arc.

GMAW – P (Pulsed Pulsed frequency Minus settings reduces Wider arc cone and

spray metal transfer) control frequency. Plus weld bead. Narrower

settings increase arc cone and narrower frequency. weld bead.

Pulse – on –Pulse™ Pulsed frequency Minus settings result in Minus settings result in

(Aluminum Only) array control lower array frequency a wider bead with more

and the plus settings distinct ripples. Plus increase the array settings narrow the frequency. resultant bead and the

ripples are less distinct.

PROCESS ARC SETTING APPLICATION AND

CONTROL RESULT SYNONYM

SMAW (STICK) Arc Force Lower (-1 to -10) for Minus settings are soft

low hydrogen types of and buttery for low electrodes. Higher (+1 hydrogen electrodes. to +10) for cellulosic Plus settings are harsh and other types. and digging for other

types of electrodes.

GMAW – S (Short Inductance or Setting -1 to -10 for The minus settings circuiting metal Pinch Control softer higher energy result a more fluid transfer arc. Setting +1 to +10 puddle and larger

for a crisper lower droplet size. The postive energy arc. settings reduce the

droplet size and reduce energy to the arc.

GMAW – P (Pulsed Pulsed frequency Minus settings reduces Wider arc cone and

spray metal transfer) control frequency. Plus weld bead. Narrower

settings increase arc cone and narrower frequency. weld bead.

Pulse – on –Pulse™ Pulsed frequency Minus settings result in Minus settings result in

(Aluminum Only) array control lower array frequency a wider bead with more

and the plus settings distinct ripples. Plus increase the array settings narrow the frequency. resultant bead and the

ripples are less distinct.

PROCESS ARC SETTING APPLICATION AND

CONTROL RESULT SYNONYM

SMAW (STICK) Arc Force Lower (-1 to -10) for Minus settings are soft

low hydrogen types of and buttery for low electrodes. Higher (+1 hydrogen electrodes. to +10) for cellulosic Plus settings are harsh and other types. and digging for other

types of electrodes.

GMAW – S (Short Inductance or Setting -1 to -10 for The minus settings circuiting metal Pinch Control softer higher energy result a more fluid transfer arc. Setting +1 to +10 puddle and larger

for a crisper lower droplet size. The postive energy arc. settings reduce the

droplet size and reduce energy to the arc.

GMAW – P (Pulsed Pulsed frequency Minus settings reduces Wider arc cone and

spray metal transfer) control frequency. Plus weld bead. Narrower

settings increase arc cone and narrower frequency. weld bead.

Pulse – on –Pulse™ Pulsed frequency Minus settings result in Minus settings result in

(Aluminum Only) array control lower array frequency a wider bead with more

and the plus settings distinct ripples. Plus increase the array settings narrow the frequency. resultant bead and the

ripples are less distinct.

TABLE B.2-ARC CONTROL SETTINGS BY PROCESS

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B-8

OPERATION

POWER MIG 350MP

In the case of special waveforms designed for pulsed welding aluminum, Pulse on Pulse™, the effect is similar to what occurs with standard pulse. As the Arc Control is increased from +1 to +10 the frequency of the Pulse on Pulse array increases. As the frequency increases the weld bead ripples become less distinct and the arc cone narrows. When the Arc Control is set from -1 to -10 the Pulse on Pulse arrays decrease in frequency, the weld bead ripples become more distinct, and the bead width increases.

n GMAW-PP mode, arc control adjusts the modulation frequency, which means the speed at which the ripples are produced in the weld. (See Pulse-on-pulse description later in this section.) When faster travel speeds are desired, arc control needs to be set higher. When slower travel speeds are desired, arc control needs to be set lower.

• The Arc-control adjustment is selected by toggling the SELECT switch until the LED next to ARC CONTROL is lit. The Arc-control value will be displayed. Arc-control can be adjusted by toggling the SET switch up or down.

• The default value is "OFF."

Crater

The crater is the end of the weld, which normally solidifies creating a concave surface. This can result in stresses that can cause cracks in the center of the crater. The purpose of the Crater control is to fill up the crater, so that its surface becomes flat.

Crater control in this machine is more efficient than in other machines. Normally, in other machines, the crater filling procedure is a step down from the welding WFS to the crater filling WFS. In this machine instead of a step down, the transition is a ramp down, which results in a more controlled filling up of the crater and so, less stresses present in it.

The values to enter are first the desired time to stay at the Crater settings and the desired WFS and voltage/trim to fill the crater.

• The Crater timer is selected by toggling the SELECT switch until the LED next to CRATER is lit and flashing. A crater time may be set using the SET switch.

• The available values for crater control time go from "Off" to 0.1 seconds and from there to 10.0 seconds in increments of 0.1 seconds.

• The Crater function offers the ability to set an endpoint for WFS and Voltage that will be reached over a specified time period. At the end of the weld when the trigger is released, the crater timer will begin and the WFS and Volts settings will ramp down from the Weld Mode WFS and Voltage settings to the Crater WFS and Voltage settings over the time selected. This creates a ramp down of the WFS and Volts during the Crater time.

• In the GMAW, FCAW, and Power weld modes, crater WFS and voltage are adjustable using the control knobs on the upper case front. This in indicated by the flashing LED’s next to "WFS" and "VOLTS."

• In the GMAW-P weld modes, Crater WFS and trim are adjustable. This is indicated by the flashing LEDs next to "WFS" and "TRIM."

Burnback

Setting the Burnback means setting the adjustable time delay between turning off the wire feeding and turning off the arc. Burnback helps to prevent wire sticking to the puddle.

• The Burnback feature will allow current to continue to flow for a specified time period at the end of a weld after wire feeding has stopped.

• The Burnback timer will be selected by toggling the SELECT switch until the LED next to BURNBACK is lit. A burnback time may be set using the SET switch.

• The default value is "OFF" (0 seconds).

• Burnback time is adjustable from 0 to 0.25 seconds in

0.01 second increments.

Spot

The Spot Timer adjusts arc on-time for spot or tack welds.

• With the Spot feature active (Spot time selected), when the trigger is pulled and the arc is established, the weld will continue until the expiration of the spot timer and the next active state will be enabled (crater or burnback). The trigger must be released and pulled again for another Spot cycle.

• The Spot timer is selected by toggling the SELECT switch until the LED next to SPOT is lit. The present SPOT time will be displayed and can be changed by toggling the SET switch up or down.

• The default value is "OFF" (0 seconds).

• Spot can be adjusted from 0 to 10.0 seconds in 0.1 second increments.

WIRE DRIVE ROLL

The drive rolls installed with the Power MIG 350MP have two grooves, one side for .030" (0.8mm) solid steel electrode, and the other for the .045”(1.2mm) electrode. The actual drive roll size is stenciled on the side opposite of its groove. If feeding problems occur, a check may be required to make sure that the wire size and the drive roll size matches. See "Procedure for Changing Drive Rolls" in this section.

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B-9

OPERATION

POWER MIG 350MP

5. Rotate the spindle and adapter so the retaining spring is at the 12 o'clock position.

6. Position the Readi-Reel so that it will rotate in a direc-

tion when feeding so as to be de-reeled from top the of the coil.

7. Set one of the Readi-Reel inside cage wires on the

slot in the retaining spring tab.

8. Lower the Readi-Reel to depress the retaining spring

and align the other inside cage wires with the grooves in the molded adapter.

9. Slide cage all the way onto the adapter until the

retaining spring "pops up" fully.

Check to be sure the retaining ring has fully returned to the locking position and has securely locked the Readi-Reel cage in place. Retaining spring must rest on the cage, not the welding electrode.

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

10. To remove Readi-Reel from Adapter, depress retain-

ing spring tab with thumb while pulling the ReadiReel cage from the molded adapter with both hands. Do not remove adapter from spindle.

FIGURE B.4

TO MOUNT 10 to 44 Lb. (4.5-20 kg) SPOOLS (12"/300 mm Diameter) or 14Lb.(6 Kg) Innershield Coils:

(For 13-14 lb. (6 Kg) Innershield coils, a K435 Coil Adapter must be used).

1. Open the Wire Drive Compartment Door

2. Depress the Release Bar on the Retaining Collar and remove it from the spindle.

3. Place the spool on the spindle making certain the spindle brake pin enters one of the holes in the back side of the spool (Note: an arrow mark on the spindle lines up with the brake holding pin to assist in lining up a hole). Be certain the wire comes off the reel in a direction so as to de-reel from the top of the coil.

CAUTION

PROCEDURE FOR CHANGING DRIVE AND IDLE ROLL SETS

1. Turn off the power source.

2. Release the pressure on the idle roll by swinging the adjustable pressure arm down toward the back of the machine. Lift the cast idle roll assembly and allow it to sit in an upright position.

3. Remove the outside wire guide retaining plate by loosening the two large knurled screws.

4. Twist the drive roll retaining mechanism to the

unlocked position as shown below and remove the drive roll. (See Figure B.3)

5. Remove the inside wire guide plate.

6. Replace the drive and idle rolls and inside wire

guide with a set marked for the new wire size. NOTE: Be sure that the gun liner and contact tip are also sized to match the selected wire size.

7. Manually feed the wire from the wire reel, over the

drive roll groove and through the wire guide and then into the brass bushing of the gun and cable assembly.

8. Replace the outside wire guide retaining plate by

tightening the two large knurled screws. Reposition the adjustable pressure arm to its original position to apply pressure. Adjust pressure as necessary.

WIRE REEL LOADING - READI-REELS, SPOOLS OR COILS

To Mount a 30 Lb. (14 kg) Readi-Reel Package (Using the Molded Plastic K363-P Readi-Reel Adapter):

. Open the Wire Drive Compartment Door

2. Depress the Release Bar on the Retaining Collar

and remove it from the spindle.

3. Place the Optional Adapter on the spindle

4. Re-install the Retaining Collar. Make sure that the

Release Bar “pops up” and that the collar retainers fully engage the retaining ring groove on the spindle.

LOCKED POSITION

UNLOCKED POSITION

FIGURE B.3

POWER MIG 350MP

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B-10B-10

OPERATION

4. Re-install the Retaining Collar. Make sure that the Release Bar “pops up” and that the collar retainers fully engage the retaining ring groove on the spindle.

FEEDING WIRE ELECTRODE

When triggered, the electrode and drive mechanism are electrically “hot” relative to work and ground and remain “hot” several seconds after the gun trigger is released.

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

NOTE: Check that drive rolls, guide plates and gun

parts are proper for the wire size and type being used. Refer to Table C.1 in ACCESSORIES section.

1. Turn the Readi-Reel or spool until the free end of

the electrode is accessible.

2. While securely holding the electrode, cut off the

bent end and straighten the first six inches. (If the electrode is not properly straightened, it may not feed properly through the wire drive system).

3. Release the pressure on the idle roll by swinging

the adjustable pressure arm down toward the back of the machine. Lift the cast idle roll assembly and allow it to sit in an upright position. Leave the outer wire guide plate installed. Manually feed the wire through the incoming guide bushing and through the guide plates (over the drive roll groove). Push a sufficient wire length to assure that the wire has fed into the gun and cable assembly without restriction. Reposition the adjustable pressure arm to its original position to apply pressure to the wire.

4. Press gun trigger to feed the electrode wire through

the gun.

IDLE ROLL PRESSURE SETTING

The idle roll pressure adjustment knob is set at the factory at the #2 hash mark. This is an approximate setting. The optimum idle roll pressure varies with type of wire, wire diameter, surface conditions, lubrication, and hardness. As a general rule, hard wires may require greater pressure, and soft, or aluminum wire, may require less pressure than the factory setting. The optimum idle roll setting can be determined as follows:

1. Press end of gun against a solid object that is electrically isolated from the welder output and press the gun trigger for several seconds.

2. If the wire “birdnests”, jams or breaks at the drive roll, the idle roll pressure is too great. Back the adjustment knob out 1/2 turn, run new wire through gun, and repeat above steps.

3. If the only result was drive roll slippage, loosen the adjustment knob on the conductor plate and pull the gun cable forward about 6" (15 cm). There should be a slight waviness in the expose wire. If there is not waviness, the pressure is too low. Tighten the adjustment knob 1/4 turn, reinstall the gun cable and repeat the above steps.

AVOIDING WIRE FEEDING PROBLEMS

Wire feeding problems can be avoided by observing the following gun handling procedures:

a. Do not kink or pull cable around sharp corners. b. Keep the gun cable as straight as possible when

welding or loading electrode through cable.

c. Do not allow dolly wheels or trucks to run over

cables.

d. Keep cable clean by following maintenance instruc-

tions.

e. Use only clean, rust-free electrode. Lincoln elec-

trodes have proper surface lubrication.

f. Replace the contact tip when the arc starts to

become unstable or the contact tip end is fused or deformed.

g. Keep wire reel spindle brake tension to the mini-

mum required to prevent excess reel over-travel which may cause wire “loop-offs” from the coil.

h. Use proper drive rolls and wire drive/idle roll pres-

sure for wire size and type being used.

WARNING

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B-11

OPERATION

POWER MIG 350MP

SPECIAL WELDING PROCESSES AVAILABLE ON THE POWER MIG 350MP

PULSE WELDING (GMAW-P)

The pulsed-arc process is, by definition, a spray transfer process wherein spray transfer occurs in pulses at regularly spaced intervals. In the time between pulses, the welding current is reduced and no metal transfer occurs.

Pulsed-arc transfer is obtained by operating a power source between low and high current levels. The high current level or “pulse” forces an electrode drop to the workpiece. The low current level or “background” maintains the arc between pulses. (See Figure B.5).

FIGURE B.5

PEAK AMPS

FREQUENCY

SPRAY TRANSITION

CURRENT

EACH PULSE DELIVERS ONE DROPLET OF WELD MATERIAL

Pulsed MIG is an advanced form of welding that takes the best of all the other forms of transfer while minimizing or eliminating their disadvantages. Unlike short circuit, pulsed MIG does not create spatter or run the risk of cold lapping. The welding positions in pulsed MIG are not limited as they are with globular or spray and its wire use is definitely more efficient. Unlike the spray arc process, pulsing offers controlled heat input that allows better welding on thin materials, lower wire feed speeds and leads to less distortion and improved overall quality and appearance. This is especially important with stainless, nickel and other alloys that are sensitive to heat input.

In GMAW-P mode, arc control adjusts the background current and frequency of the wave. When arc control goes up, the frequency increases thus increasing the droplet transfer rate.

B-12

OPERATION

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POWER MIG 350MP

PULSE-ON-PULSE™ (GMAW-PP)

Pulse on Pulse™ is a Lincoln process specifically designed for use in welding relatively thin (less than 1/4" thick) aluminum (See Table B.3). It gives weld beads with very consistent uniform ripple.

In Pulse on Pulse modes, two distinct pulse types are used, instead of the single pulse type normally used in GMAW-P. A number of high energy pulses are used to obtain spray transfer and transfer metal across the arc. Such pulses are shown in Figure B.6. After a number "N" of such pulses, depending on the wire feed speed used, an identical number "N" of low energy pulses are performed. These low energy pulses, shown in Figure B.6, do not transfer any filler metal across the arc and help to cool the arc and keep the heat input low.

The Peak Current, Background Current, and Frequency are identical for the high energy and low energy pulses. In addition to cooling the weld down, the major effect of the low energy pulses is that they form a weld ripple. Since they occur at very regular time intervals, the weld bead obtained is very uniform with a very consistent ripple pattern. In fact, the bead has its best appearance if no oscillation of the welding gun ("whipping") is used.(See Figure B.7)

When Arc Control is used in the Pulse on Pulse modes, it does the same things it does in the other pulsed modes: decreasing the Arc Control decreases the droplet transfer and weld deposition rate. Increasing the Arc Control increases the droplet transfer and weld deposition rate. Since Arc Control varies weld droplet transfer rate, the Arc Control can be used to vary the ripple spacing in the weld bead.

BENEFITS OF PULSE ON PULSE FROM LINCOLN ELECTRIC

• Excellent appearance of the weld bead

• Improved cleaning action

• Reduced porosity Table B.3 shows WFS and Trim settings for common

aluminum types and wire sizes when welding with Pulse-on-Pulse. The welds made to obtain the values in the table were fillet welds in the flat position. The values in the table can be helpful as a starting point to establish a welding procedure. From there, adjustments need to be made to set the proper procedure for each specific application (out-of-position, other types of joints, etc.).

The comments on Table B.3 show values of WFS below which it is not recommended to weld. The reason is, that below these values the weld transfer will change from a spray arc to a short-arc, which is not advisable when welding aluminum.

PEAK AMPS

BACKGROUND AMPS

TIME

HIGH HEAT PULSES

LOW HEAT PULSES

"N" PULSES "N" PULSES

FIGURE B.6

FIGURE B.7

Aluminum 4043 Aluminum 4043 Aluminum 5356 Aluminum 5356

100% Ar. 100% Ar. 100% Ar. 100% Ar.

E4043 E4043 E5356 E5356

0.035 3/64 0.035 3/64 98 99 101 102

14 ga. 250 / 1.0 200 / 1.0 230 / 1.0 225 / 1.0 10 ga. 400 /1.0 280 / 1.0 425 / 1.0 400 / 1.0

3/16 550 / 1.0 340 / 1.0 670 / 1.0 500 / 1.0

1/4 600 / 1.0 400 / 1.0 700 / 1.0 550 / 0.9

WFS / TRIM

MATERIAL

THICKNESS

MATERIAL

GAS

WIRE

WIRE SIZE

WELD MODE

Not Recommended

below 200 WFS

COMMENTS

Not Recommended

below 200 WFS

Not Recommended

below 100 WFS

Not Recommended

below 200 WFS

WELDING PROCEDURES FOR PULSE-ON-PULSE (TABLE B.3)

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B-13 B-13

OPERATION

POWER MIG 350MP

POWER MODE™

The Power Mode™ process was developed by Lincoln to maintain a stable and smooth arc at low procedure settings which are needed to weld thin metal without pop-outs or burning-through. For Aluminum welding, it provides excellent control and the ability to maintain constant arc length. This results in improved welding performance in two primary types of applications.

• Short Arc MIG at low procedure settings.

• Aluminum MIG welding.

Power Mode™ is a method of high speed regulation of the output power whenever an arc is established. It provides a fast response to changes in the arc. The higher the Power Mode Setting, the longer the arc. If a welding procedure is not established, the best way to determine the Power Mode Setting is by experimentation until the desired output result is established.

In the Power Mode two variables need to be set:

• Wire Feed Speed

• Power Mode Trim

Setting up a Power Mode procedure is similar to setting a CV MIG procedure. Select a shielding gas appropriate for a short arc process.

• For steel, use 75/25 Ar/CO

shield gas.

• For Stainless, select a Helium blend Tri-Mix.

• For Aluminum, use 100% Ar.

Start by setting the wire feed speed based upon material thickness and appropriate travel speed. Then adjust the Volts/Trim knob as follows:

• For steel, listen for the traditional “frying egg” sound of a good short-arc MIG procedure to know you have the process set correctly.

• For aluminum, simply adjust the Volts/Trim knob until the desired arc length is obtained.

Note the Volts/Trim display is simply a relative number and DOES NOT correspond to voltage.

Some procedure recommendations appear in Table B.4.

Aluminum 4043 Aluminum 5356 Mild Steel Mild Steel Mild Steel Mild Steel Mild Steel Mild Steel Stainless Steel Stainless Steel

E4043 E5356 L56 L56 L56 L56 L56 L56 E308L E308L

0.035 0.035 0.025 0.025 0.030 0.030 0.035 0.035 0.030 0.035

100% Ar. 100% Ar. 100% CO

75/25 Ar/CO2100% CO275/25 Ar/CO2100% CO275/25 Ar/CO2Tri-mix Tri-mix

22 ga.

Not Recommended

100 / 0.8

Not Recommended

90 / 1.0

20 ga. 120 / 1.0 120 / 1.0 100 / 0.7 100 /1.0 80 / 1.5 50 / 0.5 18 ga. 140 / 1.7 140 / 1.5 110 / 1.5 110 / 1.5 100 / 2.5 100 / 2.5 110 / 2.0 110 / 2.0 16 ga. 190 / 2.0 190 / 2.0 125 / 2.0 125 / 2.0 125 / 3.0 125 / 3.0 140 / 2.5 130 / 2.7 14 ga. 400 / 2.0 400 / 2.5 260 / 3.0 260 / 3.0 160 / 2.3 160 / 2.3 160 / 3.8 160 / 3.5 210 / 3.0 190 / 3.5 12 ga. 330 / 5.0 330 / 4.5 230 / 3.5 230 / 3.5 200 / 5.0 200 / 4.5 270 / 5.0 230 / 6.0 10 ga. 500 / 7.0 500 / 7.0 300 / 6.0 300 / 6.0 240 / 6.5 240 / 7.0 325 / 6.5 300 / 7.0

3/16 570 / 9.0 600 / 7.8 400 / 7.5 400 / 7.0

1/4 700 / 9.1 700 / 8.5

MATERIAL THICKNESS

WFS / POWER MODE SETTING

COMMENTS

Not

Recommended

below 400

WFS

MATERIAL

WIRE

WIRE SIZE

GAS

Not

Recommended

below 400

WFS

Recommended Welding Procedures for Power Mode - Table B.4

B-14

NOTES

POWER MIG 350MP

B-14

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POWER MIG 350MP

C-1 C-1

TABLE OF CONTENTS

- ACCESSORIES -

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

Drive Roll Kits .............................................................................................................................C-2

Push-Pull Feeding Connection Adapter Kit................................................................................C-3

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C-2

ACCESSORIES

POWER MIG 350MP

DRIVE ROLL KITS

Refer to Table C.1 for various drive roll kits that are available for the Power MIG. All items in Bold are supplied standard with the Power MIG.

TABLE C.1

*.035 Aluminum recommended for Push-Pull systems only.

3/64" (1.2 mm) ALUMINUM FEEDING KIT (K2153-1)

This kit helps push feeding aluminum through standard machine feeder and gun. It provides gun and wire drive conversion parts to weld with 3/64" (1.2 mm) aluminum wire. 5356 alloy aluminum wire is recommended for best push feeding performance.

Kit includes drive rolls and wire guide plate for the wire drive, liner and two contact tips for the gun, along with installation instructions.

K363P READI-REEL ADAPTER

The K363P Readi-Reel Adapter mounts to the 2" spindle. It is needed to mount the 22-30 lb. ReadiReels.

DUAL CYLINDER MOUNTING KIT (K1702-1)

Permits stable side-by-side mounting of two full size (9" dia. x 5' high) gas cylinders with “no lift” loading. Simple installation and easy instructions provided. Includes upper and lower cylinder supports, wheel axles and mounting hardware.

ALTERNATIVE MAGNUM GMAW GUN AND CABLE ASSEMBLIES

The following Magnum 350MP gun and cable assemblies are separately available for use with the Power MIG 350MP. Each is rated 300 amps 60% duty cycle (or 300 amps 40% duty) and is equipped with the integrated connector, twist-lock trigger connector, fixed nozzle and insulator, and includes a liner, diffuser, and contact tips for the wire sizes specified:

MAGNUM GUN CONNECTION KIT (Optional K466-6)

Using the optional K466-6 Magnum Connection kit for the Power MIG permits use of standard Magnum 200, 300 or 400 gun and cable assemblies.

K1692-2

SPOOL GUN (PRINCE

XL)

When the Power MIG Gun Selector Switch is in the “Standard / Spool Gun” position, the

Power MIG

provides gun trigger switch transfer between the Magnum gun or the spool gun for the same polarity welding with different wire and gas processes.

Closing either gun trigger will cause the electrode of both

guns to be electrically “HOT”. Be sure unused gun is positioned so electrode or tip will not contact metal case or other metal common to work.

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

Because the control circuitry senses each gun through its trigger leads, weld parameters are displayed and adjustable for the last gun that was triggered.

1. Pulling the trigger for the built-in feeder gun

(Magnum 300):

• Disables spool gun operation.

• Changes the displays of the

Power MIG 350MP

correspond to feeder gun operation.

• Closing feeder gun trigger starts feeder gun welding and makes both

electrodes electrically “HOT”.

2. Pulling SPOOL GUN Trigger:

• Disables built-in feeder gun operation.

• Changes the displays of the

Power MIG 350MP

correspond to Spool Gun operation.

• Closing spool gun trigger starts spool gun welding and makes both

electrodes electrically “HOT”.

3. Operation with Power MIG 300:

• Install the spool gun per the installation instructions

• Turn the Power MIG 350MP input power ON.

• Make sure that the Gun Selector Switch is in the “Standard / Spool Gun” position.

• Pull and release the trigger of the Spool Gun. The Power Mig recognizes the spool gun as active and weld parameters are adjustable for welding with the Spool Gun

Non-Synergic Weld Modes (Mode 5)

Wire Size Drive Roll Kit

.023”-.030” (0.6-0.8 mm)

KP1696-030S

Solid

.035” (0.9 mm) KP1696-035S

Steel

.045” (1.2 mm) KP1696-045S

.040” (1.0mm) KP-1696-2

.035-.045” (0.9-0.2mm) KP-1696-1

Cored

.035” (0.9 mm) KP1697-035C .045” (1.2 mm) KP1697-045C

Aluminum 3/64” (1.2 mm) KP1695-3/64A

English Wire Metric Wire

Length Part No. Size Size

10' (3.0 m) K470-1 12' (3.6 m) K470-7 .035 – .045" 0.9 – 1.2 mm 15' (4.5 m) K470-3

CAUTION

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C-3

ACCESSORIES

MIG 350MP

does not control the WFS at the spool

gun. Rather, it is adjusting the

Power MIG 350MP

synergic work point. Therefore, adjusting the SPD value will not change your actual WFS at the spool gun. WFS can only be changed at the spool gun.

PUSH-PULL FEEDING CONNECTION ADAPTER KIT (K2154-1)

The push-pull adapter kit provides direct connection of a Cobra Gold or Prince XL torch to the

Power MIG

350MP

wire feeder welder.

The kit is intended for use with the following Cobra Gold or Prince XL torches:

Cobra Gold

Air Cooled 15’(5m) K1589-1 Water-Cooled 15’(5m) K1590-1 Air Cooled 25’(8m) K1589-2 Water-Cooled 25’(8m) K1590-2 Air Cooled 50’(15m) K1589-3 Water-Cooled 50’(15m) K1590-3

Prince XL

Air Cooled 15’(5m) K1591-1 Water-Cooled 15’(5m) K1592-1 Air Cooled 25’(8m) K1591-2 Water-Cooled 25’(8m) K1592-2 Air Cooled 50’(15m) K1591-3 Water-Cooled 50’(15m) K1592-3

Remove all input power to the Power MIG 350MP before installing the Connection Adapter Kit.

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

Refer to the Owner’s Manual of the Torch for Amperage and Duty Cycle rating information. The torch rating may not match the rating of the power source.

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

MAKING A WELD WITH THE PRINCE XL OR COBRA GOLD TORCH INSTALLED

• Set the idle roll pressure on the wire drive between an indicator reading of 0-2. A recommended start point is 1.5.

• Set the Gun Selection toggle switch located inside the wire drive compartment directly above the pushpull control cable connector to "PUSH-PULL GUN."

• Depending on the weld mode, set the Voltage or Trim at the

Power MIG 350MP

using the right control

knob located on the upper case front panel.

• The Wire Feed Speed (WFS) is set using the control knob on the Torch. The left control knob on the

POWER MIG 350MP

is inactive. The actual WFS being

set at the torch is displayed on the

Power MIG 350MP

• All weld parameters normally available for the active weld mode are available during push-pull operation. Refer to the Operation Section of this manual.

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• Voltage is adjustable at the power source. The right control knob on the power source will adjust the voltage that is displayed in the meter directly above it.

• The left Display (WFS / AMPS) on the Power MIG 350MP will have 4 dashes (----) to indicate that the left control knob on the power source is inactive. Wire Feed Speed is set at the Spool Gun.

• The following procedure settings for Aluminum 4043 can be used as initial settings for making test welds to determine final settings:

Wire Dia. WFS Setting Arc Voltage

In. (mm) Spool Gun Setting

.030" (.8 mm) 270 15V .035" (.9 mm) 250 16V

3/64" (1.2 mm) 240 20V

4. Synergic Weld Modes

The

Power MIG 350MP

is designed to enable synergic weld modes and synergic pulse processes with the spool gun. The actual wire feed speed (WFS) of the spool gun must be measured and manually set on the Power MIG 350MP as a work point for the Power MIG 350MP (SPD).

• In synergic modes when the spool gun trigger is pulled, an adjustable value for the SPD work point is displayed in the left meter. The letters SPD are displayed in the right meter.

• The left control knob adjusts the SPD value. The right control knob is inactive.

• Measure the actual WFS, in inches per minute, at the spool gun and set the SPD at the Power MIG 350MP to match this value. WFS can be measured by pulling the trigger of the spool gun and feeding wire for 6 seconds. Measure the length of wire (in inches) that was fed and multiply by 10.

• The Power MIG 350MP is now configured and ready to weld in the synergic mode.

• Adjustment of the SPD value from the set value has the affect of adjusting trim or arc length.

• To increase the arc length; increase the SPD value at the Power MIG 350MP to a value higher than the actual WFS.

Remember; do not change the WFS at the spool gun.

• To decrease the arc length; decrease the SPD

value at the Power MIG 350MP to a value lower than the actual WFS.

Remember: The dialed in SPD value at the

Power

WARNING

CAUTION

POWER MIG 350MP

C-4

NOTES

POWER MIG 350MP

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