Lincoln Electric INVERTEC V311-T Operator's Manual page 20

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
remote modes but is typically used
2S
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)
PRE-FLOW PRE-FLOW
--GAS ON--
FIGURE B.5 2-STEP OPERATION SEQUENCE
OPERATION
(1)
(2) (3)
PRE-FLOW
PRE-FLOW
--GAS ON--
INVERTEC® V311-T AC/DC TIG
Two-Step with Foot Pedal -This
mode is only available when the
2S 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)
PRE-FLOW PRE-FLOW
--GAS ON--
FIGURE B.6 4-STEP OPERATION SEQUENCE
B-5
(3A)
PRE-FLOW
--GAS ON--