Tweco 95 S Thermal Arc(Nov2010) - Manual (Page 28)

THERMAL ARC 95 S INSTALLATION
Manual 0-5175 3-8 Installation
9. Set the “Process Selection Switch” to GTAW (Lift
TIG)
10. Set the weld current control knob to the desired
amperage.
11. The tungsten must be ground to a blunt point in order
to achieve optimum welding results. It is critical
to grind the tungsten electrode in the direction the
grinding wheel is turning.
12. Install the tungsten with approximately 1/8” to ¼”
sticking out from the gas cup, ensuring you have
correct sized collet.
13. Tighten the back cap.
14. You are now ready to begin TIG Welding
NOTE
Open the gas valve on TIG torch handle, and adjust
the pressure of regulator to 15-25 cubic feet per hour.
This gas flow should be sufficient for most TIG welding
applications.
ii. Touch the tungsten to the work piece. This closes the
welding circuit, and the arc starts by slowly LIFTING the
torch off the base metal. Keep a consistent arc length
of about 1/8-1/4”.
iii. If necessary re-adjust the amperage setting to an
appropriate level.
.