Hobart Welding Products 350LX manual High Frequency Control, Optional Sequence Controls

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4-13. High Frequency Control

1

YDo not use high frequency while Shielded Metal Arc Weld- ing (SMAW).

1 High Frequency Control

For GTAW, use control to set HF intensity. Set as low as possible.

Application:

If HF is present at the tungsten, the control is set high enough.

Arc rectification can occur when welding above 200 amps and/or while welding with helium gas. If this condition occurs, increasing the HF Intensity control towards maximum, may help to restabilize the arc.

.As high frequency intensity is increased, the possibility of inter- fering with local electronic devices, especially communication equipment, also increases. Set control as low as possible to avoid such interference.

Ref. ST-801 972

4-14. Optional Sequence Controls

 

 

 

1

Sequence Selection Switch

 

 

 

See Section 4-15.

 

 

 

2 Start Time/Spot Time Control

 

1

 

See Section 4-16.

2

4

3

Start Current Control

 

 

 

 

 

 

See Section 4-16.

 

 

 

4

Crater Time Control

 

 

 

See Section 4-17.

 

 

 

5

Final Current Control

 

 

 

See Section 4-17.

3

 

5

 

 

 

 

 

 

 

(CE Nameplate Only)

 

 

 

2

 

4

 

 

 

 

 

 

3

 

5

 

 

 

 

 

 

 

1

 

 

Ref. ST-191 372

 

 

 

 

OM-356 Page 28

 

 

 

 

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Contents Description OM-356188694JProcesses From Hobart to You Table of Contents Page Symbol Usage Marks a special safety messageArc Welding Hazards Electric Shock can killARC Rays can burn eyes and skin Welding can cause fire or explosionFlying Metal can injure eyes Buildup of GAS can injure or killPrincipal Safety Standards EMF Information About PacemakersSignification des symboles Consignes DE Securite Lire Avant UtilisationUN Choc É Lectrique peut tuer LES Fumé ES ET LES GAZ peuvent ê tre dangereuxLE Bruit peut affecter l’ouïe LE Soudage peut provoquer un incendie ou une explosionDES Particules Volantes peuvent blesser les yeux Risque D’INCENDIE OU LA Chute DE L’APPAREIL peut blesser’EMPLOI Excessif peut DES Organes Mobiles peuvent provoquer des blessuresConsignes relatives aux stimulateurs cardiaques Principales normes de sé curitéInformation sur les champs é lectromagné tiques Keep your head out of the fumes Disconnect input plug or power before working on machineDefinitions Manufacturer’s Rating Label For CE Products Symbols And Definitions Installation Selecting a LocationMovement Falling Unit Can Cause Injury Location And AirflowDimensions And Weights SpecificationsDuty Cycle And Overheating Volt-Ampere CurvesMinutes Welding Minutes Resting OverheatingWeld Output Terminals And Selecting Cable Sizes Remote 14 ReceptacleARC Welding can cause Electromagnetic Interference TerminalsTurn Off power before con Necting to receptacleElectrical Service Guide Placing Jumper Links And Connecting Input Power Close and secure primary doorOperation ControlsFor 200/230/460 Volts And Non CE Units Pulse ControlsFor CE Units Process Control Output Selector SwitchOutput Selector Switch Current Control Output ControlStart Mode When Lift-Arc is selected, start arc as followsWhen HF Start is selected, start arc as follows When HF Continuous is selected, start arc as followsAmperage Adjustment Control MetersBalance/DIG Control Preflow Time ControlPostflow Time Control Setting Pulse Controls Percent % Peak50% Bkg AmpHigh Frequency Control Optional Sequence ControlsSequence Selection Switch Start Time/Spot Time Control And Start Current ControlCrater Time Control And Final Current Control Start/Crater Sequence Controls Start Sequence Switch 4T Position Sequence Selection ControlsTimer/Cycle Counter Spot Time ControlMaintenance & Troubleshooting Routine MaintenanceDisconnect power before maintaining MonthsTools Needed 012 in 0.305 mm Adjusting Spark GapsTurn Off power before adjusting spark gaps Help 4 Display Voltmeter/Ammeter Help DisplaysHelp 3 Display Indicates the transformer of the unit has Troubleshooting There are not user serviceable parts inside unitProtect against overheating Check for water in torch, and repair torch if necessaryFan not operating Electrical Diagram Circuit DiagramIncorrect Installation High FrequencyWelding Processes Requiring High Frequency Weld ZoneCorrect Installation Nonmetal Building Ground workpiece if required by codesMetal Building Metal Building RequirementsParts List Main AssemblyTRANSFORMER/STABILIZER Assembly 200/230/460 Optional Switch, Push Button -1 Item 185Page Service SupportCall Contact your Distributor forHobart Welding Products