Thermal Arc 201 TS Service Manual page 36

THERMAL ARC 161STL, 201TS
LIFT TIG (GTAW) Sequence of Operation
Before any welding is to begin, be sure to
wear all appropriate and recommended safety
equipment.
1. Switch the ON/OFF Switch (located on the rear panel)
to OFF.
2. Connect the work lead to positive output terminal. It
is essential that the male plug is inserted and turned
fully clockwise until connector locks in place to achieve
reliable electrical connection.
3. Connect the TIG torch as follows:
a) Place the power cable into the negative output ter-
minal. It is essential that the male plug is inserted
and turned fully clockwise until connector locks
in place to achieve reliable electrical connection;
b) Place the 8 pin plug into the 8 pin socket. To make
connections, align keyway, insert plug, and rotate
threaded collar fully clockwise.
c) Place the TIG torch gas hose to the gas outlet
and tighten with a wrench. Caution: DO NOT over
tighten.
4. Using a secured Argon cylinder, slowly crack open then
close the cylinder valve while standing off to the side
of the valve. This will remove any debris that may be
around the valve & regulator seat area.
5. Install the regulator (for details of VICTOR regulator,
please refer to 3.08 ) and tighten with a wrench.
6. Connect one end of the supplied gas hose to the outlet
of the Argon regulator and tighten with a wrench. Cau-
tion: DO NOT over tighten.
7. Connect the other end of the supplied gas hose to
the gas inlet fitting on the rear panel of the welder
and tighten with a wrench. Caution: DO NOT over
tighten.
8. Open the Argon Cylinder Valve to the fully open posi-
tion.
9. Connect the ground (work) clamp to your work
piece.
10. Set the DOWN SLOPE control knob to the desire weld
current ramp down time. Refer to Section 4.01.
11. Set the weld current control knob to the desired am-
perage.
Operation
CAUTION
12. The tungsten must be ground to a blunt point in or-
der to achieve optimum welding results. It is critical
to grind the tungsten electrode in the direction the
grinding wheel is turning.
13. Install the tungsten with approximately 1/8" to ¼"
sticking out from the gas cup, ensuring you have
correct sized collet.
14. Tighten the back cap then open the valve on the
torch.
15. Plug the power cable into the appropriate outlet, and
turn the switch to the "ON" position. The power L.E.D.
light should illuminate.11. Set the "Process Selection
Switch" to LIFT TIG
16. You are now ready to begin TIG Welding.
4-8
OPERATION
Manual 0-5148