Lincoln Electric IM10066 manual Wire WELDING-CV, ARC Gouging, Table b.3 Typical Current Ranges

b-9 OPERATION b-9

WIRE WELDING-CV

Connect a wire feeder to the AIR VANTAGE® 500 (AU) (AU)according to the instructions in INSTALLA- TION INSTRUCTIONS Section.

The AIR VANTAGE® 500 (AU) in the ”CV-WIRE” position, permits it to be used with a broad range of flux cored wire (Innershield and Outershield) elec- trodes and solid wires for MIG welding (gas metal arc welding). Welding can be finely tuned using the “ARC CONTROL”. Turning the ARC CONTROL clockwise from -10(soft) to +10(crisp) changes the arc from soft and washed-in to crisp and narrow. It acts as an inductance/pinch control.

The proper setting depends on the procedure and operator preference. Start with the knob set at 0.

For any electrodes, including the above recommenda- tions, the procedures should be kept within the rating of the machine. For additional electrode information, See www.lincolnelectric.com or the appropriate Lincoln publication.

ARC GOUGING

For optimal performance when arc gouging, set the AIR VANTAGE® 500 (AU) “WELD MODE” switch to the “CC - STICK” position, and the “ARC CONTROL” to 10.

Set the “OUTPUT” knob to adjust output current to the desired level for the gouging electrode being used according to the ratings in the following Table B.2

TAbLE b.2

Carbon Diameter	Current Range (DC, elec-
	trode positive)
1/8"(3.2mm)	30-60 Amps
5/32"(4.0mm)	90-150 Amps
3/16"9(4.8mm)	200-250	Amps
1/4"(6.4mm)	300-400	Amps
5/16"(8.0mm)	350-450	Amps
3/8"(10.0mm)	450-575	Amps*

NOTE: If desired the CV mode can be used for Arc Gouging.

*Maximum current setting is limited to the AIR VANTAGE® 500 (AU) maximum of 575 Amps.

		Table b.3 TYPICAL CURRENT RANGES (1)				FOR TUNGSTEN ELECTRODES (2)
			DCEN (-)	DCEP (+)	Approximate Argon Gas Flow Rate
						l/min (c.f.m.)
Tungsten
Electrode			1%, 2%	1%, 2%					TIG TORCH
Diameter			Thoriated	Thoriated	Aluminium		Stainless Steel		Nozzle
mm (in)			Tungsten	Tungsten					Size (4), (5)
.25	(0.010)		2-15	(3)	2-4	(3-8)	2-4 (3-8)		#4, #5, #6
.50	(0.020)		5-20	(3)	3-5	(5-10)	3-5	(5-10)
1.0	(0.040)		15-80	(3)	3-5	(5-10)	3-5	(5-10)
1.6	(1/16)		70-150	10-20	3-5	(5-10)	4-6	(9-13)	#5, #6
2.4	(3/32)		150-250	15-30	6-8 (13-17)		5-7 (11-15)		#6, #7, #8
3.2	(1/8)		250-400	25-40	7-11	(15-23)	5-7 (11-15)
4.0	(5/32)		400-500	40-55	10-12	(21-25)	6-8 (13-17)		#8, #10
4.8	(3/16)		500-750	55-80	11-13	(23-27)	8-10	(18-22)
6.4	(1/4)		750-1000	80-125	13-15	(28-32)	11-13 (23-27)

(1)When used with argon gas. The current ranges shown must be reduced when using argon/helium or pure helium shielding gases.

(2)Tungsten electrodes are classified as follows by the American Welding Society (AWS):

Pure	EWP
1% Thoriated	EWTh-1
2% Thoriated	EWTh-2

Though not yet recognized by the AWS, Ceriated Tungsten is now widely accepted as a substitute for 2% Thoriated Tungsten in AC and DC applica- tions.

(3)DCEP is not commonly used in these sizes.

(4)TIG torch nozzle “sizes” are in multiples of 1/16ths of an inch:

# 4 =	1/4 in.	6 mm
# 5 =	5/16 in.	8 mm
# 6 =	3/8 in.	10 mm
# 7 =	7/16 in.	11 mm
# 8 =	1/2 in.	12.5 mm
#10 =	5/8 in.	16 mm

(5)TIG torch nozzles are typically made from alumina ceramic. Special applications may require lava nozzles, which are less prone to breakage, but can- not withstand high temperatures and high duty cycles.

AIR VANTAGE® 500 (AU)