Lincoln Electric INVERTEC V270-T AC/DC Manuel D'utilisation page 9

1. The Weld Sequence Diagram shows the various
parameters that can be selected and adjusted and
their preset values. As the push button/rotary
encoder is pressed a triangular shaped flashing
indicator will highlight the adjustable parameter on
the sequence diagram in bold. Each press of
theencoder will scroll to the next selected parameter
sequentially. Rotating the push button encoder will
change the selected parameter value. The display
is dynamic in that adjusting the selected parameter
dynamically changes the shape of the sequence
diagram. After 5 seconds of inactivity the selected
parameter will default back to the weld Output
Amperes parameter. Depressing the button again
will remember the last selected parameter and
begin the sequential scroll from that parameter.
Three Sequence Diagram types exist:
• STICK (See Figure B.4a)
•
TIG (See Figure B.4b)
•
Pulse TIG (See Figure B.4c)
Figure B.4a
Figure B.4b
Figure B.4c
2. The Parameter Display Section shows the
selected parameter its display icon and preset
value. To change the value, rotate the push
button/rotary encoder. Some parameters like AC
Frequency have an Enhanced Icon Display that
shows the effect of the varying parameter on the arc
and/or weld bead profile. As these parameters are
adjusted an indicator will move between the
minimum and maximum icon to show the relative
effect of that parameter. Pulse Frequency shown in
Figure B.4c is an example of the enhanced icon
display. Refer to Table B.1 for a list of Enhanced
Icons.
Parameter
Ac Frequency
Ac Balance
Pulse Frequency
Hot Start
Arc Force
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:
Push button 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.
Push button B: Trigger Modes
TIG Trigger Sequences
TIG welding can be done in either the 2-step or 4-step
mode. The specific sequences of operation for these
two trigger modes are explained below.
2-Step TIG Sequence
With the 2-step trigger mode and a TIG welding mode
selected, the following welding sequence will occur.
A-4
Symbol
Minimum Maximum
Table B.1
Table B.2