User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved.
Page 2-11
Air Bearings
Twenty-two (22) air bearings are used on the MH3D to provide virtually friction-
less, noncontact travel along the respective axes. Air supplied to the bearings is
forced through an orifice in the active surface and is uniformly distributed
throughout the surface by a system of grooves. Air pressure between the bearing
and the rail causes the bearing to float, allowing air to escape. The bearing
retracts until the pressure is equalized by the preload or weight on the bearing.
The air bearings are adjustable, however, since the MH3D is calibrated with the
air bearings at a given setting, any adjustments will require recalibration and thus
should be changed only by TESA service engineers.
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