Operation – Lincoln Electric INVERTEC SVM161-A User Manual
Page 22
OPERATION
B-6
B-6
INVERTEC® V205-T AC/DC™
3. Press and hold the TIG torch trigger when the main
part of the weld is complete.
The machine will now decrease the output current at
a controlled rate, or downslope time, until the Finish
current is reached. Both the Downslope Time and
the Finish Current are presettable. This Finish cur-
rent can be maintained as long or as short as nec-
essary.
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 below.
By releasing and re-pressing the TIG torch trigger dur-
ing 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)
9. Welding selection button - Permits selection of the
welding mode. The LED beside the symbol confirm
the selection:
• Stick
• TIG DC
• TIG AC
10. Electrode Connection (Negative) - For quick dis-
connect system using Twist-Mate
TM
cable 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 dis-
connect system using Twist-Mate
TM
cable plugs
13. Welding Parameter Display - LED’s show which
mode or welding parameter is activated for adjust-
ment.
• If it is necessary to modify the welding parameters
"Item 13":
- Wait four seconds after the LED’s 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 LED’s in the diagram
“Item 13” comes on (in clockwise 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 seconds and the Weld Current LED
will come on again.
4 STEP DIAGRAM 1
4 STEP DIAGRAM 2
WELDING PARAMETER DEFAULTS AND RANGES
PARAMETER
VALUE
MIN
MAX
DEFAULT
START CURRENT
AMPS
6
MAX
15
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
HZ
20
150
100
AC BALANCE
% EN
35
85
65
(EN = Electrode Negative)
MODE
DC TIG
TRIGGER
2 STEP
LOCAL / REMOTE
LOCAL
(3)
(4)
*
Maximum Weld Current can be limited by input voltage, Welding Mode, AC TIG waveform and AC TIG frequency.