Lincoln Electric IM756-A manual Welding Capability, Limitations, Controls and Settings

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B-2

OPERATION

B-2

 

 

 

WELDING CAPABILITY

The machine is rated at 70 amps, 17 volts, at 20% duty cycle on a ten minute basis. It is capable of high- er output currents at lower duty cycles.

LIMITATIONS

The machine is recommended for welding on mild steel up to 1/8” thick.

CONTROLS AND SETTINGS

FIGURE B.1

4

3

1

2

Refer to Figure B.1.

1.Power ON/OFF Switch -When the power is ON the welding output and wire feeder are ON (“hot”) when the gun trigger is pressed.

2.Low / High Heat Range Switch. -A rocker switch control that gives low or high coarse range adjust- ment of the power source output voltage.

3.1 – 2 Fine Heat Adjustment Switch. -Allows fine adjustment of the voltage within the selected Low or High output range.

4.Wire Speed Control. -Controls the wire feed speed. Wire speed is not affected when changes are made in the voltage control.

TABLE B.1 – MIG WELDING MATERIAL/GAS COMBINATIONS

Material

Gas

Carbon Steel

CO2 or Argon/CO2

Low Alloy Steel

CO2 or Argon/CO2

FLUX-CORED (INNERSHIELD) WELDING

The recommended electrode for the flux-cored, self- shielded process is 0.035” (0.9 mm) diameter Lincoln Innershield NR-211-MP on 2 lbs. (.9 kg) spools.

SEQUENCE OF OPERATIONS

WIRE LOADING AND THREADING

Refer to Figure B.2.

Turn machine power switch to the OFF (“0”) position before working inside the wire feed enclosure.

Make sure that the wire feed drive roll and the contact tip of the gun match the diameter and type of wire used.

1.Push the spool onto the spindle so that the wire feeds off the bottom of the spool, toward the drive roll.

2.Push the spool spacer onto the spindle, against the spool.

3.Slide the spring onto the spool, then press on the spool lock, turning it clockwise to lock the spool assembly onto the spindle.

FIGURE B.2

 

SPOOL

 

SPACER

SPINDLE

 

 

SPOOL

SPOOL

LOCK

 

SPRING

WELDING OPERATIONS

PROCESS GUIDELINES

MIG WELDING

Table B.1 shows the recommended material/gas combinations for MIG welding with solid electrodes.

HANDY MIG

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Contents Handy MIG California Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéThank You Master Table of Contents for ALL Sections Technical Specifications Handy MIG InstallationHandy MIG Identify and Locate Components Safety PrecautionsElectric Shock can kill Stacking Select Suitable Location Changing Polarity Input ConnectionsCode Requirements for ELECTRI- CAL Input Connections Shielding GAS ConnectionRequirements for Maximum Output Extension Cord UsageDesign Features and Advantages Operational Features and ControlsOperation General DescriptionWelding Capability Controls and SettingsLimitations Welding Operations3OPERATIONB-3 Contact TIP Wire ElectrodeShielding GAS Contact Tip To Work Distance CtwdMaking a Weld 4OPERATIONB-4Table B.1 Handy MIG Changing Machine Over to Feed Other Wire Sizes Cleaning TIP and GAS NozzleOverload Protection Thermal ProtectionAccessories AccessoriesInnershield Welding Wire MIG Welding WireMaintenance Safety Precautions MaintenanceItems Requiring No Maintenance Routine and Periodic MaintenanceCleaning Components AS Required Cleaning the GUN LinerComponent Replacement Procedures Changing the Contact TIPWork Cable Installation GUN Assembly RemovalHOW to USE Troubleshooting Guide TroubleshootingRecommended Course of Action Problems Possible Symptoms CauseFacility Contact your local Lincoln Authorized Field ServiceWelding Problems Handy DiagramsWiring Diagram for Code Hinge Door Assembly for Code 10919 only Handy MIG Handy MIG Precaucion Warnung
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