Principle Of Operation - SKF TKSA 11 Mode D'emploi

1.2 Principle of operation

Two, non-contact, inductive proximity sensors measure the variation in distance between
the sensors and the reference bar. The sensors are rigidly mounted in the measuring unit
and are separated at a ixed distance. The measuring unit is irmly attached to the shaft at
the movable machine side. The reference bar is irmly attached
to the shaft at the stationary machine side by means of a magnetic support.
During the measuring procedure, measurements are taken in three positions, each
separated by 90°, known as the 9, 12, and 3 o'clock measurements.
As the shafts are rotated through an arc, any parallel misalignment or angular
misalignment causes the two sensors to measure the difference in their position relative to
the reference bar.
Positioning information for the measuring unit is wirelessly communicated to the iOS
device, which calculates the amount of shaft misalignment and advises corrective
adjustments of the machine feet.
If the shafts of a machine train are not co-linear when the machine is in operation, they
are by deinition misaligned.
SKF TKSA 11 7