Lincoln Electric 180i MP Operator's Manual page 17

MULTIPROCESS WIRE FEEDER WELDER
TIG SETUP AND USE
Procedure for TIG welding with a Foot Pedal
TIG welding with a foot pedal requires a Lincoln Electric K1782-16
Ready to Weld TIG Torch, a K4361-1 Foot Pedal and
a bottle of 100% Argon Shielding Gas. The foot pedal permits the
output current to be adjusted while welding. The foot pedal can be
used to initiate the welding output and the ow of argon shielding
gas. The machine will automatically detect when the foot pedal is
connected and set the machine to TIG mode.
Connect the Items to the machine as shown below
FIGURE B.6
K1782-17 Ready to
Weld TIG Torch
The welding arc current will be determined by the position of the
foot pedal and the position of the V/A dial present on the front of
the machine. In order to achieve maximum output, the V/A dial
must be set to the letter "J" position and the foot pedal must be
fully closed. Lower outputs can be achieved by reducing the V/A
dial or by reducing the pressure on the foot pedal. To start the
welding arc, lightly touch the tungsten to the piece that is to be
welded and then press the foot pedal. Slowly pull or rock the
tungsten off the work piece and the welding arc will initiate. After
the foot pedal is released the shielding gas will continue to ow
for 8 seconds. This post ow period is used to prevent contam-
ination to the tungsten while the tungsten is still warm and to
prevent contamination of the weld puddle.
100% Argon
Shielding Gas.
K4361-1 Foot Pedal
Procedure for TIG welding without a Foot Pedal
FIGURE B.7
K1782-17 Ready to
Weld TIG Torch
The welding output current will be determined by the position of
the V/A dial present on the front of the machine. To start the
welding arc, lightly touch the tungsten to the piece that is to be
welded and keep the tungsten on the work piece for about 1
second to initiate the Argon shielding gas. Slowly pull or rock the
tungsten off the work piece and the welding arc will initiate. After
welding is complete the shielding gas will continue to ow for 8
seconds. This post ow period is used to prevent contamination to
the tungsten while the tungsten is still warm and to prevent conta-
mination of the weld puddle.
B-7
OPERATION
100% Argon
Shielding Gas.