Lincoln Electric IM756-A Select Suitable Location, Stacking, Changing Polarity, Input Connections

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A-3

INSTALLATION

A-3

 

 

 

SELECT SUITABLE LOCATION

Place the machine on a secure, level surface or rec- ommended undercarriage. The machine may topple over if this procedure is not followed. To minimize over heating, locate the welder in a dry location where there is free circulation of clean air. Do not place on com- bustible surfaces.

STACKING

Machines cannot be stacked.

CHANGING POLARITY

1.For Negative Polarity Welding (DC-): Refer to Figure A.2. As delivered, the machine is wired for Negative polarity with the gun cable connected to the Negative (-) output terminal and the work cable to the Positive (+) output terminal. Make sure that both thumbscrews are tight. This is the typical con- figuration for Flux Cored Welding (FCAW).

FIGURE A.2

WORK CABLE

 

 

GUN CABLE

GUN CABLE

WORK CABLE

2.For Positive Polarity Welding (DC+): Refer to Figure A.3. To wire for Positive polarity, connect the gun cable to the Positive (+) output terminal and the work cable to the Negative (-) terminal. This is the typical configuration for the Metal Inert Gas (MIG) process. Make sure that both thumbscrews are tight.

(FIGURE A.3)

GUN CABLE

WORK CABLE

GUN CABLE

WORK CABLE

INPUT CONNECTIONS

(FIGURE A.4)

GAS INLET FITTING

POWER INPUT CABLE

Refer to Figure A.4.

The machine has two input connections, the power input cable and the gas inlet fitting. The power input cable and gas inlet fitting are located on the rear.

GAS CONNECTION

When using the MIG process, a cylinder of shielding gas (appropriate for the metal being welded) must be obtained.

WARNING

CYLINDER may explode if damaged. Keep cylinder upright and chained to support.

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

•Never lift welder with cylinder attached.

•Never allow welding electrode to touch cylinder.

•Keep cylinder away from welding or other live electrical circuits.

BUILDUP OF SHIELDING GAS may harm health or kill.

• Shut off shielding gas supply when not in use.

•SEE AMERICAN NATIONAL STANDARD Z-49.1, “SAFETY IN WELDING AND CUTTING” PUB- LISHED BY THE AMERICAN WELDING SOCIETY.

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HANDY MIG

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Contents Handy MIG Safety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcThank You Master Table of Contents for ALL Sections Technical Specifications Handy MIG InstallationHandy MIG Identify and Locate Components Safety PrecautionsElectric Shock can kill Changing Polarity Select Suitable LocationStacking Input ConnectionsRequirements for Maximum Output Shielding GAS ConnectionCode Requirements for ELECTRI- CAL Input Connections Extension Cord UsageOperation Operational Features and ControlsDesign Features and Advantages General DescriptionLimitations Controls and SettingsWelding Capability Welding OperationsShielding GAS Contact TIP Wire Electrode3OPERATIONB-3 Contact Tip To Work Distance CtwdMaking a Weld 4OPERATIONB-4Table B.1 Handy MIG Overload Protection Cleaning TIP and GAS NozzleChanging Machine Over to Feed Other Wire Sizes Thermal ProtectionInnershield Welding Wire AccessoriesAccessories MIG Welding WireItems Requiring No Maintenance MaintenanceMaintenance Safety Precautions Routine and Periodic MaintenanceComponent Replacement Procedures Cleaning the GUN LinerCleaning Components AS Required Changing the Contact TIPGUN Assembly Removal Work Cable InstallationTroubleshooting HOW to USE Troubleshooting GuideProblems Possible Symptoms Cause Recommended Course of ActionContact your local Lincoln Authorized Field Service FacilityWelding Problems Diagrams HandyWiring Diagram for Code Hinge Door Assembly for Code 10919 only Handy MIG Handy MIG Precaucion Warnung
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