The heart of the Airtangent 2002
tonearm is the air-bearing system.
The air-bearing used in the Airtangent 2002
tonearm uses a highly pressurized film of air in conjunction
with a closed-circle symmetrical array of pressure-control
elements result in an air-bearing with extremely high
stiffness and intrinsically stable behavior. The arm is
floating on a thin film of pressurized air surrounding an
air-beam. The only force moving the tonearm is the gentle
force of the stylus. Owing to the air-bearing, the friction
between the arm and the air-beam on which it is mounted is
zero.
Extremely tight manufacturing tolerances
It is a low-airflow, high pressure, extremely tight tolerance
critically damped ultra high precision, air-bearing system.
The air-beam with 132 laser cut micro-perforations is the
source for the tiny air-streams used to create the air-bearing
for the sleeve assembly. Constant high pressure and low
airflow are maintained in the bearing sleeve/beam interface as
the bearing sleeve travels along the beam via an extremely
tight tolerance film of air just 25 micron thick (47.Cross
section of the air-bearing system).
The air pressurizes the entire bearing surface, escaping at
the interface of the sleeve and beam.
The air-bearing is remarkably light and rigid. Many pivoted
arms have less rigid bearings than this, and even with the air
supply turned off the arm appears to have negligible play with
respect to the beam. All parts are in superbly engineered
metal (except the arm-tube) with the particular metal used
chosen for this special role in each case.
The air beam is machined from titanium in order to maintain
the required accuracy and stability.
The air-bearing sleeve is manufactured from aluminium for
exceptional rigidity and reduced effective moving mass of the
air-bearing assembly. |