Lincoln Electric SVM185-A service manual GMAW-STT Welding, Figure B.15

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B-20	OPERATION	B-20
GMAW-STT™ WELDING		FIGURE B.15

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Surface Tension Transfer, or STT™ welding, is a break-through process offered exclusively by the Lincoln Electric Company. STT™ is a low heat, low spatter process created with Waveform Control Technology™. STT™ is the process of choice for open root welding, welding on thin materials or welding on parts with poor fit-up. Low spatter, even when using 100% CO2 shielding gas, results in cost savings in gas and part clean-up.

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Several sets of STT™ weld modes are available.

•Modes 110 and 126 provide individual control of peak current, background current and tail-out, and are most often used in robotic applications.

•Modes 123 and 124 include Hot Start and give total control of the arc.

•Synergic STT™ modes keep the arc characteristics the same when the wire feed speed is changed.

Note: STT™ is available only with specially equipped Power Wave power sources, like the POWER FEED® 25M/STT.

For best results:

•Attach the work sense lead as close as possible to the welding arc.

•Use only solid steel or silicon bronze electrodes.

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1		K2203-1	Power Wave® 455M/STT
		K2230-1	POWER FEED® 10M, Bench Model
		K2234-1	POWER FEED® 10M Dual, Bench Model
2		K2536-1	POWER FEED® 25M
		KP1695-xx,	Drive Roll Kit, 2 Roll Feeder
		KP1507-xx	Drive Roll Kit, 4 Roll Feeder
3		K1543-xx	Digital Control Cable
	4	K1796-xx, K2593-xx	Coaxial Weld Power Cable, Lug to Lug
5		K910-xx	Ground Clamp
6		K940-xx	Sense Lead Kit
7		See Magnum	MIG Gun
		Literature
			Deluxe Regulator for Mixed
8		K586-1	Shielding Gases
			Shielding Gas Hose

POWER FEED® 25M