Lincoln Electric IM467-B manual Operation

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B-9

B-9

OPERATION

•ARC ESTABLISHED LED goes on when the arc is fully established and goes out if the arc goes out.

•START LED is on from the time the arc is estab- lished until current begins to go up (soft start) or down (hot start). Note that the Start LED is off during upslope if a soft start is used.

•PEAK LED goes on after the Start period. If the Pulse switch is on, the Peak LED goes off dur- ing the Background periods. The Peak LED and Background LED will alternate when pulsing.

•BACKGROUND LED is on during the Background (low pulse) period of pulsing.

•CRATER FILL LED is on during the Fade-Out downslope and final current periods.

NOTE: An LED will light in response to the control cir- cuit command, even if other components do not work. For example, if the gas supply is turned off or the gas solenoid valve malfunctions or the fuse is blown, the gas will not flow even though the Gas and Water LED lights up. Another example is the High Frequency LED which can light, yet there will not be high frequency due to a blown fuse or defective high frequency circuit or spark gaps set too large.

The Status Indicator LEDs are useful for understanding which functions are active during a weld sequence and for how long. They are useful for setting times of the controls on the Function Panel. See Figure B.2.

The Status Indicator LED circuit board includes a receptacle for plugging in the circuit board included with the Optional Interface Kit.

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 C Section DSection E P196 SeriesInstallation Technical Specifications Square Wave TIGSafety Precautions Select Suitable LocationHigh Frequency Interference Protection Input Connections Ground ConnectionInput Supply Connection Electric Shock can killReconnect Procedure Figure A.2 Input Supply ConnectionsTable A.1 Recommended Input Wire and Fuse Sizes Table A.2 Recommended Input Wire and Fuse SizesVolt/Freq Nameplate AWG Copper Cond Volt/Freq AC Output AWG Copper CondOutput Connections TIG Torch ConnectionLengths up to 100 to 200 ft 200 to 250 ft 100 ft 30 m 30 to 61 m 61 to 76 mStick Electrode Cable Connection Safety Instructions Operating InstructionsOperational Features and Controls Design Features and AdvantagesGeneral Description Recommended ProcessesWelding Capability LimitationsControls and Settings Upper Case Front ControlsMode Switch STEP/4-STEP SwitchHigh Frequency Switch Upper Case Front Control PanelVOLTS/AMPS Switch Peak Current ControlAC Wave Balance 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 Welding Operation Initial START-UPStick Welding TIG Welding GuidelinesIllustrated in the 2-Step Mode for clarity Table B.1 Specific Effects of ControlsCrater Fill Switch on OFFStart Switch on Pulse Switch on Crater Fill Switch onSpot Switch OFF Spot Switch onTable B.2 Typical Current RANGES1 for Tungsten ELECTRODES2 Dcen Dcep + Unbalanced Wave Balanced WaveTIG Welding Sequence Operation 2-STEP Mode TIG Welding Sequence Operation 4-STEP ModeTable B.3 Recommended Settings for TIG Welding 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