Miller Electric 350 VS manual Lift-Arc TIG Procedure, Stick Start Procedure, Low OCV Stick

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5-4. Lift-Arc TIG Procedure

1 2

1 − 2

“Touch” Seconds

Do NOT Strike Like A Match!

With Process Switch in the Lift-Arc TIG position, start an arc as follows:

1TIG Electrode

2Workpiece

Touch tungsten electrode to work- piece at weld start point, hold electrode to workpiece for 1-2 seconds, and slowly lift electrode. An arc will form when electrode is lifted.

Normal open-circuit voltage is not present before tungsten electrode touches workpiece; only a low sensing voltage is present between electrode and workpiece. The solid-state output contactor does not energize until after electrode is touching workpiece. This allows electrode to touch workpiece with- out overheating, sticking, or getting contaminated.

Ref. S-156 279

5-5. Stick Start Procedure

With Stick selected, start arc as fol-

lows:

1 Electrode 2 Workpiece 3 Arc

Drag electrode across workpiece like striking a match; lift electrode slightly after touching work. If arc

1goes out electrode was lifted to high. If electrode sticks to workpiece, use a quick twist to free it.

	Low OCV Stick
	The unit can be optionally config-
2	ured for low open circuit voltage
	(OCV) operation. When the unit is
	configured for low OCV operation
3	only a low sensing voltage (approxi-
3	mately 15 VDC) is present between

the electrode and the workpiece prior to the electrode touching the workpiece. Consult a Factory Authorized Service Agent for infor- mation regarding how to configure the unit for low OCV stick welding operation.

OM-2251 Page 21

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Contents Processes OM-2251217 661JDescription File MultiprocessFrom Miller to You Table of Contents Page Arc Welding Hazards Symbol UsageElectric Shock can kill HOT Parts can cause severe burnsARC Rays can burn eyes and skin Fumes and Gases can be hazardousWelding can cause fire or explosion Flying Metal or Dirt can injure eyesFire or Explosion hazard Welding Wire can cause injuryFalling Unit can cause injury Moving Parts can cause injuryCalifornia Proposition 65 Warnings Principal Safety StandardsEMF Information About Implanted Medical DevicesUNE Décharge Électrique peut entraîner la mort Symboles utilisésLES Fumées ET LES GAZ peuvent être dangereux DES Pièces Chaudes peuvent provoquer des brûlures gravesLE Soudage peut provoquer un in cendie ou une explosion LES Bouteilles peuvent exploser si elles sont endommagées LE Bruit peut endommager l’ouïeRisque D’INCENDIE OU D’EXPLO- Sion LA Chute DE L’APPAREIL peut blesserLES Fils DE Soudage peuvent provoquer des blessures Proposition californienne 65 AvertissementsLE Soudage À L’ARC risque de provoquer des interférences Information EMF Principales normes de sécuritéEn ce qui concerne les implants médicaux OM-2251 CC Mode SpecificationsCV Mode − Introduction60% Duty Cycle Duty Cycle And OverheatingMinutes Welding Minutes Resting OverheatingDimensions And Weight − InstallationSelecting a Location =GND/PE Earth Ground Connecting 1-Phase Input PowerConnecting 3-Phase Input Power Single-Phase Input Voltage Electrical Service GuideInput Amperes At Rated Output Min Grounding Conductor Size In AWG/KcmilARC Welding can cause Electromagnetic Interference Weld Output Terminals And Selecting Cable Sizes350 ft 400 ft Put terminals Output ReceptaclesOperation Optional Gas Valve Operation And Shielding Gas ConnectionFront Panel Controls − OperationMode Meter Reading At Idle Meter Reading While Welding Mode Switch SettingsMode Switch Setting Process Output Control Meter FunctionsStick Start Procedure Lift-Arc TIG ProcedureLow OCV Stick Do not remove case when blowing out inside of unit − Maintenance & TroubleshootingBlowing Out Inside Of Unit Voltmeter/Ammeter Help Displays TroubleshootingCircuit Diagram − Electrical Diagram219 863-C MOD Parts AssemblyPLG1 PLG13 Page Start Your Professional Welding Career Now Your distributor also gives ServiceSupport Miller Electric Mfg. Co To locate a Distributor or Service Agency visitFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s