Hobart Welding Products 350LX manual Start/Crater Sequence Controls

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4-18. Start/Crater Sequence Controls

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		1	Sequence Selection Switch
	(CE Nameplate Only)	Place switch in Start/Crater posi-
	(CE Nameplate Only)	tion.
		2	Start Time/Spot Time
		1	Control
		Use control to select 0–15 sec-
		onds of start time.
		3	Start Current Control
		Use start control to select a start-
		ing current (3–400 amps) that is
		different from the weld current.
		4	Crater Time Control
		Use control to reduce current
		over a set period of time (0–15
		seconds) at the end of the weld
		cycle when NOT using a remote
		current control.
		5	Final Current Control
	2	Final current is the current to
		which weld current has sloped
		down to (0–100% of current set
		on Amperage Adjust control).
		Application:
		Start current can be used while
		GTAW welding to assist in pre-
		heating a cold material prior to
		depositing filler material. Start
		current can also be used for
		SMAW to ensure a more consis-
		tent arc strike.
		Crater Time can be used while
		GTAW welding when material be-
		ing welded is crack sensitive, and
	3	the operator is using an on/off
	3	type control to start and stop the
		type control to start and stop the
		welding process.
		NOTE: Use this method when
		the function of a remote control is
		desired, but only a remote on/off
		control is available.

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OM-356 Page 31

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Contents Description OM-356188694JProcesses 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 Bruit peut affecter l’ouïe LE Soudage peut provoquer un incendie ou une explosionDES Particules Volantes peuvent blesser les yeux DES Organes Mobiles peuvent provoquer des blessures Risque D’INCENDIE OULA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peutConsignes 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 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 Process Control Output Selector SwitchOutput Selector Switch 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 maintainingTools 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 There are not user serviceable parts inside unit TroubleshootingProtect against overheating Check for water in torch, and repair torch if necessaryFan not operating 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 ServiceCall Contact your Distributor forHobart Welding Products