Lincoln Electric IM612 manual Welding Process, Stick Constant Current Welding

B-7 OPERATION B-7

WELDING PROCESS

STICK (CONSTANT CURRENT) WELDING

Connect welding cables to the "TO WORK” and "ELECTRODE” studs. Start the engine. Set the "Polarity” switch to the desired polarity. Set the “RANGE” switch to a setting that is equal to or slightly greater than the desired welding current. (The “RANGE” dial marking indicates the maximum current for that range). Fine adjustment of the welding current is made by adjusting the output “CONTROL” or remote control. For best arc stability, use settings 5 through 10.

The RANGER 8+ DIESEL can be used with a broad range of AC and DC stick electrodes. See “Welding Tips 1” included with the machine for electrodes with- in the rating of this unit and recommended welding currents of each.

TIG (CONSTANT CURRENT) WELDING

The K930-2 TIG Module installed on a RANGER 8+ DIESEL provides high frequency and shielding gas control for AC and DC GTAW (TIG) welding process- es. The TIG Module allows full range output control. Afterflow time is adjustable from 0 to 55 seconds.

When using the RANGER 8+ DIESEL for AC TIG welding of aluminum, the following settings and elec- trodes are recommended:

SETTINGS FOR PURE TUNGSTEN

TUNGSTEN	RANGE SWITCH						APPROXIMATE
DIAMETER (in.)			SETTINGS				CURRENT RANGE
1/8	70,		90,	or 125		80		- 150 Amps
3/32	50,		70,	or	90	45		- 130 Amps
1/16			50,	or	70	40		- 80 Amps
SETTINGS FOR 1% THORIATED TUNGSTEN
TUNGSTEN	RANGE SWITCH						APPROXIMATE
DIAMETER (in.)			SETTINGS				CURRENT RANGE
1/8	70,	90, 125, or 175					80	- 225	Amps
3/32	50,	70,		90, or 125			50	- 180	Amps
1/16		50,		70, or	90		45	- 120	Amps

The K930-1 TIG Module should be used with the RANGER 8+ DIESEL on high idle to maintain satisfac- tory operation. It can be used in the AUTO position but the delay going to low idle after welding is ceased will be increased if the AFTERFLOW CONTROL is set above 10 seconds

WIRE FEED WELDING PROCESSES (CONSTANT VOLTAGE)

The only Innershield® electrode recommended for use with the RANGER 8+ DIESEL is NR®-211-MP. The electrode sizes and welding ranges that can be used with the RANGER 8+ DIESEL are shown in the follow- ing table:

Diameter	Wire Speed		Approximate
(in.)	Range In./Min.		Current Range
.035	80	- 110	75A to 120A
.045	70	- 130	120A to 170A
.068	40	- 90	125A to 210A

The RANGER 8+ DIESEL is recommended for limited “MIG” welding (GMAW - gas metal arc welding). The recommended electrodes are .030” and .035” L-50 and L-56. They must be used with a blended shield- ing gas such as C25 (75% Argon - 25% CO2). The welding ranges that can be used with the RANGER 8+ DIESEL are shown in the following table:

Diameter	Wire Speed	Approximate
(in.)	Range In./Min.	Current Range
.030	80 - 110	75A to 120A
.035	70 - 130	120A to 170A

RANGER 8+ DIESEL