Lincoln Electric IM467-B manual Welding Capability, Limitations

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B-3

B-3

OPERATION

115 Volt receptacle with 15 amp circuit breaker.

Excellent arc starting and stability up through 400 amps.

High resistance to AC arc rectification.

No tungsten spitting within current range of elec- trode.

Compact size, requires only a 22.25 in x 26 in (565 mm 660 mm) footprint.

Strain relief holes in base for welding cables, gas and water hoses and control cables.

WELDING CAPABILITY

The Square Wave TIG 355 is NEMA Class II (40) Power Source rated 350 amps at 34 volts, 40% duty cycle. The duty cycle is based upon a 10 minute time period. (For 40% duty cycle, it is 4 minutes on and 6 minutes off.) The overload capacity is 375 amps at 35 volts, 30% duty cycle.

The “Lincoln Plus” rating of 300 amps at 40 volts pro- vides additional voltage to overcome voltage drops in long cables when stick welding at high currents.

Easy access for input connections. Connections are simple strip and clamp of input wires (no lugs required).

Low fan noise at idle.

Modular construction for easy servicing.

Unused controls are automatically locked out to simplify setup. Examples: the AC Wave Balance control has no effect in DC; the High Frequency and gas and water valves do not operate in Stick mode; TIG Pulser is locked out in the Stick mode.

Recessed panels protect controls, output terminals, gas and water fittings.

Large safety margins and protective circuits protect rectifiers from transient voltages and high currents.

Line voltage compensated.

Thermostatically protected.

Electronic over current protection.

LIMITATIONS

The Square Wave TIG 355 is not recommended for arc gouging. The machine's output capacity is too limited.

The Square Wave TIG 355 is not recommended for AC TIG welding with high concentrations of helium shielding gas. Starting problems and arc rectifica- tion may occur.

The Square Wave TIG 355 is not recommended for pipe thawing.

SQUARE WAVE TIG 355

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Contents Square Wave TIG Safety Electric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Thank You Table of Contents Section E Section CSection D P196 SeriesInstallation Technical Specifications Square Wave TIGSafety Precautions Select Suitable LocationHigh Frequency Interference Protection Input Supply Connection Input ConnectionsGround Connection Electric Shock can killReconnect Procedure Figure A.2 Input Supply ConnectionsVolt/Freq Nameplate AWG Copper Cond Table A.1 Recommended Input Wire and Fuse SizesTable A.2 Recommended Input Wire and Fuse Sizes Volt/Freq AC Output AWG Copper CondLengths up to 100 to 200 ft 200 to 250 ft Output ConnectionsTIG Torch Connection 100 ft 30 m 30 to 61 m 61 to 76 mStick Electrode Cable Connection Safety Instructions Operating InstructionsGeneral Description Operational Features and ControlsDesign Features and Advantages Recommended ProcessesWelding Capability LimitationsControls and Settings Upper Case Front ControlsHigh Frequency Switch Mode SwitchSTEP/4-STEP Switch Upper Case Front Control PanelAC Wave Balance VOLTS/AMPS SwitchPeak Current Control Auto Balance LEDSpot Controls Pulse ControlsStart Controls Figure B.2 Status Indicator Light Sequence Square Wave TIG Crater Fill ControlsOperation Lower Case Front Controls Figure B.3 Lower Case Frontcontrols Square Wave TIGOperation Hand and Foot Amptrol Operation Operation Stick Welding Welding OperationInitial START-UP TIG Welding GuidelinesIllustrated in the 2-Step Mode for clarity Table B.1 Specific Effects of ControlsCrater Fill Switch on OFFSpot Switch OFF Start Switch onPulse Switch on Crater Fill Switch on Spot Switch onTable B.2 Typical Current RANGES1 for Tungsten ELECTRODES2 Dcen Dcep + Unbalanced Wave Balanced WaveTable B.3 Recommended Settings for TIG Welding TIG Welding Sequence Operation 2-STEP ModeTIG Welding Sequence Operation 4-STEP Mode Polarity SwitchAuxiliary Power Overload ProtectionALL Machines Accessories OPTIONS/ACCESSORIESMaintenance Input Power Factor Capacitor Discharge ProcedureRoutine and Periodic Maintenance Figure D.2 General Component Locations Troubleshooting Guide General Machine TroubleTroubleshooting Guide Stick Welding Symptom Cause and RemedyTroubleshooting Guide TIG Welding TIG Welding Lower Panel Controls Accessories K870 Foot Amptrol or K963 Hand AmptrolDiagrams Dimension Print Square Wave TIG355 Equipment Installation Certification Equipment MANUFACTURER’S CertificationPage Precaucion Aviso DE