AR-G2/AR 2000ex/AR 1500ex Getting Started Guide Page 25
Radial Air Bearings
Radial bearings provide stiffness and support in the radial direction. The AR-G2, AR 2000ex, and AR
1500ex are designed with two porous carbon radial bearings, located above and below the motor.
Rotational Mapping
The characteristics of any real bearing will vary with angular position. By combining absolute angular
position data from the optical encoder with microprocessor control of the motor, these small variations can
be mapped automatically, and the results stored. Unless changes to the bearing characteristics occur, the
variations are stable over time.
The microprocessor can, therefore, allow for the variations by recovering the stored map and making the
appropriate baseline correction to the applied torque. This results in a very wide bearing operating range,
without operator intervention.
Instructions for performing the rotational mapping can be found in TRIOS Online Help. The figures below
show examples of the AR-G2 performance before and after mapping.
Figure 6 Rotational mapping examples.
To Next Page
Loading...
