Lincoln Electric IM10051 manual Welding Modes, Table B.2, TIG Trigger Modes

B-5 OPERATION B-5

3.The Mode Push Buttons and Indicators show the current selection made by the corresponding weld push buttons (A-F). Refer to Table B.2 for a full list of all parameters and their ranges. Below is a description of the function of each push button and display:

A.WELDING MODES

	DC TIG - DC TIG welding with high
	frequency arc initiation.
	AC TIG - AC TIG welding with high
	frequency arc initiation.
	DC Touch Start TIG - DC TIG welding with
	lift tig arc initiation.
	Stick crisp mode - for Cellulosic electrodes
	like Exx10.
	Stick soft mode - for E7018 Low Hydrogen
	electrodes.
	AC Stick Mode - for AC Stick Electrodes.
	Table B.2
B. TIG TRIGGER MODES
	Two Step with Arc Start Switch -
	This mode is available in local or
2S	remote modes but is typically used
	with an arc start switch. Depressing
	the arc start switch will initiate the arc
	at the start current level and ramp up
	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 mode the start current and finish cur- rent can be independently set and upslope and downslope times are adjustable. (Refer to Figure B.5)

Two-Step with Foot Pedal -This

mode is only available when the 2S machine senses a remote amperage control device is plugged in. It is used when a foot or hand amptrol is plugged in. When this trigger mode is selected, upslope and downslope are set to zero and non-adjustable since the operator would manually adjust ramp up and ramp down of the weld- ing current using the amptrol. The start and finish currents are linked together and are repesented by a parameter called Minimum Current.

(Refer to Figure B.5)

Four Step - This mode is intended to be used with an arc start switch. It will not function properly in remote mode with a foot or hand amptrol plugged in. In four step operation depressing an arc start switch will cause the machine to initiate the arc at the start current level. When the switch is released the machine will ramp up to the maximum current over the ups- lope time. Depressing the arc start switch again causes the output to ramp down to the finish current level over the downslope time. Finally releasing the arc start switch causes the arc to go out. (Refer to Figure B.6)

(3A)

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

FIGURE B.6 4-STEP OPERATION SEQUENCE

(1) (2) (3)

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

FIGURE B.5 2-STEP OPERATION SEQUENCE

INVERTEC® V311-T AC/DC TIG