Lincoln Electric 205-TAC/DCTIG manual Tig Dc

B-5 OPERATION B-5

4.Release the TIG torch trigger.

The output current of the machine will turn OFF and the gas valve will remain open to continue the flow of the shielding gas. The duration of this postflow time is adjusted by the Postflow parameter. This operation is shown in (4 step diagram 1).

Possible variations of this standard sequence are shown in (4 step diagram 2). By releasing and re- pressing the TIG torch trigger during the downslope step, the output will immediately drop to and hold at the Finish Current. Releasing the trigger will turn off the output and begin postflow. This operation shown in (4 step diagram 2).

4 STEP DIAGRAM 1

(1) (2) (3) (4)

4 STEP DIAGRAM 2

9.Welding selection button - Permits selection of the welding mode. The LED beside the symbol confirm the selection:

•Stick Crisp-used for E6010 and other cellulosic electrodes

•Stick Soft-used for low Hydrogen and E7018 electrodes

•TIG DC

•TIG AC (AC/DC model only)

10.Electrode Connection (Negative) - For quick disconnect system using Twist-MateTMcable plugs with gas pass through for TIG Torches.

11.Remote Control Connector - For the connection of a Lincoln Foot Amptrol, Hand Amptrol or Arc Start Switch. See the ACCESSORIES section for available options.

12.Electrode Connection (Positive) - For quick disconnect system using Twist-MateTMcable plugs

13.Welding Parameter Display - LEDʼs show which mode or welding parameter is activated for adjustment.

•If it is necessary to modify the welding parameters "Item 13":

-Wait four seconds after the LEDʼs on the panel have gone out, the welding current LED will be lit.

-Press the SETUP/Parameter push button "Item 4"; every time the push button is pressed, one of the LEDʼs in the diagram “Item 13” comes on (in clock- wise sequence) and the value of the parameter appears on the Digital display "Item 6". Stop at the desired parameter.

-Rotate the Output/Parameter Adjust Knob"Item 5" and modify the parameter value.

-Press the SETUP/Parameter "Item 4" push button again to pass to another parameter, or wait five sec- onds and the Weld Current LED will come on again.

14.VRD (Voltage Reduction Device) Status Lights- Voltage reduction device can be enabled from the set-up menu and an output voltage limit can be set that reduces the output open circuit voltage when not welding to that limit. If enabled when the machine is sitting idle the Green VRD on light will illuminate to indicate the voltage is reduced below the set limit. If the VRD device is not enabled (factory default) from the set up menu or while welding the red VRD off light will illuminate.

Note: The green VRD on light will illuminate in TIG mode until the output is triggered even when VRD is disabled.

WELDING PARAMETER DEFAULTS AND RANGES

PARAMETER	VALUE	MIN	MAX	DEFAULT
START CURRENT	AMPS	6	MAX	6
UPSLOPE	SEC.	0	10	0.2
WELD CURRENT*	AMPS	6	MAX	100
DOWNSLOPE	SEC.	0	10	1.0
FINISH CURRENT	AMPS	6	MAX	8
POSTFLOW	SEC.	0.2	60	5.0
PULSE FREQUENCY	HZ	0.1	500	0.5
% ON TIME	%	5	95	50
BACKGROUND CURRENT	% OF WELD CURRENT	1	100	20
AC FREQUENCY (AC/DC model only)	HZ	20	150	100
AC BALANCE	% EN	35	85	75
(AC/DC model only)	(EN = Electrode Negative)
MODE				DC TIG
TRIGGER				2 STEP
LOCAL / REMOTE				LOCAL

*Maximum Weld Current can be limited by input voltage, Welding Mode, AC TIG waveform and AC TIG frequency.

V205-T DC & V205-T AC/DC TIG