Hobart Welding Products 350LX manual Start Mode, Application

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4-6. Start Mode

(CE Nameplate Only)

1

1

2 3

Lift-ArctStart Method

1 – 2

“Touch” Seconds

1 Start Mode

For SMAW welding, press button to toggle LED to Off position.

For GTAW welding, use control to select Off for no HF, Lift-Arct, HF for arc starting only, or continuous HF. See Section 4-13 for ad- justing high frequency intensity.

Application:

When Off is selected, use the scratch meth- od to start an arc for both the SMAW and GTAW processes.

When Lift-Arc is selected, start arc as follows:

2TIG Electrode

3Workpiece

Touch tungsten electrode to workpiece at weld start point, enable output with torch trigger, foot control, or hand control. Hold electrode to workpiece for 1-2 seconds,

Do NOT Strike Like A Match!

and slowly lift electrode. An arc will form when electrode is lifted.

Shielding gas begins to flow when elec- trode touches work piece.

Normal open-circuit voltage is not present before tungsten electrode touches work- piece; only a low sensing voltage is present between electrode and workpiece. The sol- id state output contactor does not energize until after electrode is touching workpiece. This allows electrode to touch workpiece without overheating, sticking, or getting contaminated.

Application:

Lift-Arc is used for the DCEN GTAW pro- cess when HF Start method is not per- mitted.

When HF Start is selected, start arc as follows:

High frequency turns on to help start arc when output is enabled. High frequency

turns off when arc is started, and turns on whenever arc is broken to help restart arc.

Application:

HF Start is used when the DCEN GTAW process is required.

When HF Continuous is selected, start arc as follows:

High frequency turns on when output is en- ergized and remains on for duration of weld.

Application:

HF Continuous is used when the AC GTAW process is required.

NOTE: Lit LED indicates selected mode.

When Output Selector switch position changes, LED may change position, based upon last selection.

NOTE: Some start methods may not be available for all processes.

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Contents OM-356188694J ProcessesDescription From Hobart to You Table of Contents Page Electric Shock can kill Symbol UsageMarks a special safety message Arc Welding HazardsBuildup of GAS can injure or kill ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal can injure eyesPrincipal Safety Standards About Pacemakers EMF InformationLES Fumé ES ET LES GAZ peuvent ê tre dangereux Signification des symbolesConsignes DE Securite Lire Avant Utilisation UN Choc É Lectrique peut tuerLE Soudage peut provoquer un incendie ou une explosion DES Particules Volantes peuvent blesser les yeuxLE Bruit peut affecter l’ouïe DES Organes Mobiles peuvent provoquer des blessures Risque D’INCENDIE OULA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peutPrincipales 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 Location And Airflow InstallationSelecting a Location Movement Falling Unit Can Cause InjurySpecifications Dimensions And WeightsOverheating Duty Cycle And OverheatingVolt-Ampere Curves Minutes Welding Minutes RestingTerminals Weld Output Terminals And Selecting Cable SizesRemote 14 Receptacle ARC Welding can cause Electromagnetic InterferenceNecting to receptacle Turn Off power before conElectrical Service Guide Close and secure primary door Placing Jumper Links And Connecting Input PowerPulse Controls OperationControls For 200/230/460 Volts And Non CE UnitsFor CE Units Output Selector Switch Output Selector SwitchProcess Control Output Control Current ControlWhen HF Continuous is selected, start arc as follows Start ModeWhen Lift-Arc is selected, start arc as follows When HF Start is selected, start arc as followsMeters Amperage Adjustment ControlPreflow Time Control Balance/DIG ControlPostflow Time Control Bkg Amp Setting Pulse ControlsPercent % Peak 50%Optional Sequence Controls High Frequency ControlStart Time/Spot Time Control And Start Current Control Sequence Selection SwitchCrater Time Control And Final Current Control Start/Crater Sequence Controls Sequence Selection Controls Start Sequence Switch 4T PositionSpot Time Control Timer/Cycle CounterMonths Maintenance & TroubleshootingRoutine Maintenance Disconnect power before maintainingAdjusting 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 There are not user serviceable parts inside unit TroubleshootingCheck for water in torch, and repair torch if necessary Fan not operatingProtect against overheating Circuit Diagram Electrical DiagramWeld Zone Incorrect InstallationHigh Frequency Welding Processes Requiring High FrequencyMetal Building Requirements Correct InstallationNonmetal Building Ground workpiece if required by codes Metal BuildingMain Assembly Parts ListTRANSFORMER/STABILIZER Assembly 200/230/460 Optional 185 Switch, Push Button -1 ItemPage Support ServiceContact your Distributor for Hobart Welding ProductsCall