Lincoln Electric IM703-A manual Figure B.5

Page 26

B-11

OPERATION

B-11

 

 

 

The new foot pedal provides such independent action distinction of precisely where the arc start switch actu- ates without over-riding minimum control pedal posi- tion, and precisely where the control pedal has been returned to minimum position without inadvertently de- actuating the arc start switch. The result is repeatable consistency in TIG weld starting and crater-fill for man- ual process control.

FIGURE B.5

Foot

Rock Toe

Control Pressure

Switch

Adjustable

or

Removable

Heel Stop

Using this new foot pedal with the Precision TIG’s new presettable Minimum Output level, in addition to the presettable Maximum Output level, further enhances the starting and crater level consistency as well as the control resolution of the manually controlled foot pedal.

Fully Pressed Control Pedal

At-Rest

Control Pedal

Off

Maximum Output Machine Setting

Minimum Output Machine Setting

Time

Pressed

At-Rest

Switch Pedal

Switch Pedal

 

Setup for TIG Amptrol Welding

FIGURE B.6

AC Balance

AUTO

or

Set:

Standard Controls

Power Switch

ON

Mode Switch

TIG

Polarity Switch

AC or DC-

More + for alum.oxide "Cleaning" w/o"Spitting" or "wetting"loss.

Balanced for equal + and - current. More - for higher "Penetration".

Min. to Max. Amptrol

Max. to Min.

Amptrol

Pulse Frequency

4-6 pps is a typical initial setting.

Set for bead shape and travel speed: Higher for thinner plate and faster travel. Lower for thicker plate and slower travel.

% On Time

40-60%is a typical initial setting.

Set for total heat of Peak current:

Lower reduces distortion and burn-thru.

Background Current

40-60%is a typical initial setting.

Set as low as will maintain a pulse arc (Will not drop below Min.Output setting.)

Local/Remote

Switch

REMOTE

Maximum Output

Set to desired max. Amptrol output level.

Minimum Output

Press Display switch

and Set to desired min. Amptrol (Start/Crater) output level.

Postflow

Set as low as required.

Higher for larger

tungsten and current.

Advanced Panel

Controls

Trigger Switch

2-STEP

Pulse Switch

ON or OFF

Downslope

ZERO

For no arc-out delay.

PRECISION TIG 375

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Contents Safety Depends on You Precision TIGSafety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcThank You Table of Contents Duty Cycle-Applications InstallationRated Input Single Phase only Volts at Rated Amperes AmpsTemperature Ranges Recommended Input Wire and Fuse SizesPhysical Dimensions Additional Output CapacitySafety Precautions Input and Grounding Connections Stick Electrode Cable Connection Output CABLES, Connections and LimitationsWork Cable Connection TIG Torch Connection Figure A.2Auxiliary Power Connections Figure A.3Robotic Interface Connection Figure A.4Pipe Thawing OperationProduct Description Welding SparksProcess Limitations Recommended Processes and EquipmentRecommended Processes Equipment LimitationsControls and Settings Figure B.1 Control PanelMinimum Output Control and Display Switch Do not USE 4-STEP if Using AN Amptrol Remote Advanced Panel ControlsPulse Background Current Control Stick Welding Features Internal SET UP ControlsTIG Welding Features Figure B.3 Figure B.4 Using the Start Pedal Foot Amptrol K870-1 TIG Weld Cycle ChartSetup Guidelines for TIG Welding with AN Amptrol Figure B.5 Gtaw Process Making a TIG Weld with AN AmptrolSmaw Process Field Installed Options AccessoriesFactory Installed Options Optional EquipmentRoutine and Periodic Maintenance MaintenanceSafety Precautions Overload ProtectionSpark GAP Adjustment Service ProceduresComponent Access UNDER-COOLER ServiceTroubleshooting HOW to USE Troubleshooting GuidePossible Areas SymptomsOutput Problems Course of ActionMeter Problems GAS ProblemsHI-FREQ Problems Preset & Output Control Problems Stick Welding Problems TIG Welding ProblemsTIG Problems Precision TIG 375 Wiring Diagram for Code MID Precision TIGDimension Print K1833-1 DOMESTIC, K1833-2 Canada and K1834-1 Export Precision TIG Warnung Aviso DE
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