Lincoln Electric IM827-D manual STT and STT II Synergic, STT and STT II Modes, 035 045 052

b-26OPERATIONb-26

MACHINE FUNCTIONALITY bY WELD PROCESS

STT AND STT II (SYNERGIC)

Use the following tables to review how the machine functions (output controls, arc control, Start options and weld options) for the weld modes listed in the top table.

STT AND STT II MODES

MATERIAL	PROCESS		GAS	WIRE SIzE
				0.035	0.045	0.052
STEEL	STT		Ar/CO2	109	125	125
STAINLESS
			CO2
STEEL	STT		Ar/CO2
		II		110	126	126
STAINLESS			CO2

OUTPUT CONTROL KNObS (There is no Voltage control when STT welding.)

200			----
WFS	AMPS		VOLTS	TRIM
LESS	MORE
DEPOSITION	DEPOSITION
EFFECT / RANGE			DESCRIPTION
PEAK CURRENT		Peak Current acts similar to an
		arc pinch control. Peak Current
		sets the arc length and pro-
		motes good fusion. Higher
		peak current levels will cause
		the arc to broaden momentarily
		while increasing arc length. If
		set too high, globular transfer
		may occur. Setting it too low
		may cause instability and wire
		stubbing. Best practice is to
		adjust for minimum spatter and
		puddle agitation.
B A C K G R O U N D Background Current controls
CURRENT		the overall heat input in the
		weld. High background cur-
		rents flatten the weld bead,
		and low background currents
		create a taller rounded con-
		tour.
TAIL OUT		Tail out provides additional
(STT ll MODES		power	without	the molten
ONLY)		droplet becoming too large.
		Increase as necessary to add
		heat input without increasing
		arc length. Often this results in
		faster travel speeds. Note that
		as tail out increases, the peak
		current and/or background cur-
		rent may need to be reduced.

START OPTIONS

	PREFLOW TIME		FUNCTION
	0 - 25.0 seconds	Adjusts the time the gas flows
		after the trigger is pulled and
		prior to feeding wire.
	RUN-IN WFS:
	Off, 30 to150 in/min.	Run-in sets the wire feed
		speed from the time the trigger
		is pulled until an arc is estab-
		lished.
	Start Procedure	The Start Procedure controls
		the WFS. Trim at a specified
		time at the beginning of the
		weld. During the start time, the
		machine will ramp up or down
		from the Start Procedure to the
		preset Welding Procedure.
END OPTIONS
	PARAMETER RANGE		FUNCTION
	Postflow Time:
	0 to 10 seconds		Adjusts the time that shielding gas
			flows after the welding output
			turns off.
	Crater Procedure		Crater Procedure controls the
			WFS and volts for a specified time
			at the end of the weld after the
			trigger is released. During the
			Crater time, the machine will ramp
			up or down from the Weld
			Procedure to the Crater
			Procedure.
	Burnback:		The burnback time is the amount
	0 to .25 Seconds		of time that the weld output contin-
			ues after the wire stops feeding. It
			prevents the wire from sticking in
			the puddle and prepares the end
			of the wire for the next arc start.
	Spot Timer:		Adjusts the time welding will con-
	0 to 120.0 Seconds		tinue even if tigger is still pulled.
			This option has no effect in 4-Step
			Trigger Mode.

POWER FEED™ 10M SINGLE WIRE FEEDER