Miller Electric XMS 4000 manual TIG Lift-Arc Welding, Preparing Unit For Stick Welding

4-15. TIG Lift-Arc Welding

1 2

1 − 2

“Touch” Seconds

Do NOT Strike Like A Match!

Lift-Arc Start

When Lift-Arctbutton light is On, start arc as follows:

1TIG Electrode

2Workpiece

Touch tungsten electrode to work- piece at weld start point, enable out- put and shielding gas with torch trig- ger, foot control, or hand control.

Hold electrode to workpiece for 1-2 seconds, and slowly lift elec- trode. Arc is formed 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.

Application:

Lift-Arc is used for the DCEN or AC GTAW process when HF Start method is not permitted, or to re- place the scratch method.

		Ref. S-156 279
4-16. Preparing Unit For Stick Welding
To select STICK welding process, proceed	. Be aware that STICK welding can be	This parameter increases output amper-
as follows:	enabled (L20 On) or disabled (L20 Off)	age at the start of a weld to eliminate elec-
Follow safety precautions according to		trode sticking.
	using P7 push button, and this status
Section 1.	is retained in the STICK welding pro-	ARC FORCE Setting (only in MENU
Prepare unit according to Section 3.	cess memory.	FULL)
Connect electrode holder to the Positive	HOT START Setting (only in MENU	To change ARC FORCE setting, proceed
power connector 2.	FULL)	as follows:
Connect work clamp cable to the Work	To change HOT START setting, proceed	Press P2 to enter SET UP menu.
connector 3.	as follows:	Select MENU FULL on D1 and D2 (see
If a remote control is desired, connect it to	Press P2 to enter SET UP menu.	Section 4-9).
the Remote Control receptacle 4.	Select MENU FULL on D1 and D2 (see	Use E1 to change D1 to ARC.
Turn unit On.	Section 4-9).	D2 value is default setting of 80% (range is
Allow time for unit to complete its start up	Use E1 to change D1 to HOT.	0% to 100%).
cycle.	D2 value is default setting of 100% (range	Use E2 to change D2 value.
Set STICK welding process using P3 push	is 0% to 100%).	When setting is increased, short-circuit
button.	Use E2 to change D2 value.	amperage at low arc voltage increases.

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