Hobart Welding Products 350LX manual Postflow Time Control

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4-11. Postflow Time Control

(CE Nameplate Only)

1

1

1 Postflow Time Control

Use control to set length of time (0–50 seconds) gas flows after welding stops. It is important to set enough time to allow gas to flow un- til after the tungsten and weld puddle has cooled down.

Application:

Postflow is required to cool tung- sten and weld, and to prevent con- tamination of tungsten and weld. In- crease postflow time if tungsten or weld are dark in appearance.

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Contents OM-356188694J ProcessesDescription From Hobart to You Table of Contents Page Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killPrincipal Safety Standards EMF Information About PacemakersUN Choc É Lectrique peut tuer Signification des symbolesConsignes DE Securite Lire Avant Utilisation LES Fumé ES ET LES GAZ peuvent ê tre dangereuxLE Soudage peut provoquer un incendie ou une explosion DES Particules Volantes peuvent blesser les yeuxLE Bruit peut affecter l’ouïe ’EMPLOI Excessif peut Risque D’INCENDIE OULA Chute DE L’APPAREIL peut blesser DES Organes Mobiles peuvent provoquer des blessuresPrincipales normes de sé curité Information sur les champs é lectromagné tiquesConsignes relatives aux stimulateurs cardiaques Disconnect input plug or power before working on machine DefinitionsKeep your head out of the fumes Manufacturer’s Rating Label For CE Products Symbols And Definitions Movement Falling Unit Can Cause Injury InstallationSelecting a Location Location And AirflowDimensions And Weights SpecificationsMinutes Welding Minutes Resting Duty Cycle And OverheatingVolt-Ampere Curves OverheatingARC Welding can cause Electromagnetic Interference Weld Output Terminals And Selecting Cable SizesRemote 14 Receptacle TerminalsTurn Off power before con Necting to receptacleElectrical Service Guide Placing Jumper Links And Connecting Input Power Close and secure primary doorFor 200/230/460 Volts And Non CE Units OperationControls Pulse ControlsFor CE Units Output Selector Switch Output Selector SwitchProcess Control Current Control Output ControlWhen HF Start is selected, start arc as follows Start ModeWhen Lift-Arc 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 50% Setting Pulse ControlsPercent % Peak 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 ControlDisconnect power before maintaining Maintenance & TroubleshootingRoutine Maintenance MonthsAdjusting Spark Gaps Turn Off power before adjusting spark gapsTools Needed 012 in 0.305 mm Voltmeter/Ammeter Help Displays Help 3 Display Indicates the transformer of the unit hasHelp 4 Display Troubleshooting There are not user serviceable parts inside unitCheck for water in torch, and repair torch if necessary Fan not operatingProtect against overheating Electrical Diagram Circuit DiagramWelding Processes Requiring High Frequency Incorrect InstallationHigh Frequency Weld ZoneMetal Building Correct InstallationNonmetal Building Ground workpiece if required by codes Metal Building RequirementsParts List Main AssemblyTRANSFORMER/STABILIZER Assembly 200/230/460 Optional Switch, Push Button -1 Item 185Page Service SupportContact your Distributor for Hobart Welding ProductsCall