Lincoln Electric IM958 manual Welding Modes, Table B.2, TIG Trigger Modes

B-5				OPERATION					B-5
3. The Mode Push Buttons and Indicators show the								Two-Step with Foot Pedal -This
current selection made by the corresponding weld								mode is only available when the
push buttons (A-F). Refer to Table B.2 for a full list						2S		machine senses a remote amperage
of all parameters and their ranges. Below is a								control device is plugged in. It is used
description of the function of each push button and								when a foot or hand amptrol is
display:								plugged in. When this trigger mode is
A. WELDING MODES								selected, upslope and downslope are
								set to zero and non-adjustable since
		DC TIG - DC TIG welding with high						the operator would manually adjust
		frequency arc initiation.						ramp up and ramp down of the weld-
								ing current using the amptrol. The
		AC TIG - AC TIG welding with high						start and finish currents are linked
		frequency arc initiation.						together and are repesented by a
								parameter called Minimum Current.
								(Refer to Figure B.5)
		DC Touch Start TIG - DC TIG welding with
		lift tig arc initiation.						Four Step - This mode is intended to
		Stick crisp mode - for Cellulosic electrodes						be used with an arc start switch. It will
		like Exx10.						not function properly in remote mode
								with a foot or hand amptrol plugged
		Stick soft mode - for E7018 Low Hydrogen						in. In four step operation depressing
		electrodes.						an arc start switch will cause the
								machine to initiate the arc at the start
								current level. When the switch is
		AC Stick Mode - for AC Stick Electrodes.
								released the machine will ramp up to
								the maximum current over the ups-
		Table B.2
								lope time. Depressing the arc start
B. TIG TRIGGER MODES								switch again causes the output to
								ramp down to the finish current level
		Two Step with Arc Start Switch -						over the downslope time.	Finally
		This mode is available in local or						releasing the arc start switch causes
	2S	remote modes but is typically used						the arc to go out. (Refer to Figure B.6)
		with an arc start switch. Depressing
		the arc start switch will initiate the arc
		at the start current level and ramp up							(3A)
		the output to the maximum current
		over the time set by the upslope time.
		Releasing the switch will cause the
		output amperage to ramp down to the
		finish current over the downslope time
		and then turn off the output.		In this	PRE-FLOW			PRE-FLOW	PRE-FLOW
		mode the start current and finish cur-					--GAS ON--		--GAS ON--
		rent can be independently set and
		upslope and downslope times are			FIGURE B.6 4-STEP OPERATION SEQUENCE
		adjustable. (Refer to Figure B.5)
		(1)	(2)	(3)

PRE-FLOW	PRE-FLOW	PRE-FLOW	PRE-FLOW
	--GAS ON--		--GAS ON--

FIGURE B.5 2-STEP OPERATION SEQUENCE

V310-T AC/DC TIG