Hobart Welding Products 150 STI Maintenance and Troubleshooting, Process Selection, Lift-Arc

5-2. Process Selection

=Light Off	=Light On		1	Process Selector Switch Pad
			Use control to select required welding
			process. Press switch pad until LED
			for desired process is illuminated.
			2	Lift Arct	Start
	4		When selected, a TIG arc starting
2			method in which the electrode must
			come in contact with the workpiece to
3			initiate an arc is activated (see Section
			5-3).
			3	Stick (SMAW)
1			When selected, Adaptive Hot Start
			and DIG circuitry are energized.
Press	Press	Press	4	Lift Arct	Start (Remote)

A TIG starting method in which the electrode must come in contact with the work and a closure from pin 1 to pin 2 on the remote receptacle (see Sec- tion 4-6) is required to initiate an arc.

5-3. Lift-Arc™

		“Touch”	1 − 2
1	2
			Seconds

Do NOT Strike Like A Match!

Lift-Arc Start

1TIG Electrode

2Workpiece

Touch tungsten electrode to work- piece, hold for 1-2 seconds, slowly lift electrode, and an arc forms.

Open-circuit voltage may be present before electrode touches workpiece.

SECTION 6 − MAINTENANCE AND TROUBLESHOOTING

6-1. Routine Maintenance

Y Disconnect power before maintaining.

. Maintain more often during severe conditions.

3 Months

Replace unreadable labels.

Replace Damaged

Gas Hoses

Repair Or Replace

Cracked Cables

And Cords

6 Months

YDo not remove case when blowing out inside of unit . Blow out inside. Direct airflow through front and back louvers.

OM-951 Page 13