Renishaw XM-60 multi-axis calibrator User Manual page 13

XM multi-axis calibrator
The XM system uses three laser beams (1,2 and 3) to measure the linear, pitch
and yaw errors using interferometry. The light emitting diode (LED) beam (4) is
used for straightness and roll measurements.
The basic measurement concept is:
Angular
The three interferometric beams provide a linear measurement
of the separation between launch and receiver. Because the
distance between these beams is known, angular errors of pitch
and yaw can be determined by the system.
Linear
Using the pitch and yaw measurements, the linear error is
determined based on the combination of beams 1, 2 and 3 to
calculate the linear error at the position of beam 4.
The 4th (diode source) beam is used to measure straightness and roll.
Straightness
The vertical and horizontal straightness error is measured using
a position sensor within the receiver and transmitted back to the
laser via wireless communication.
Roll
Roll measurement is performed optically using a roll detector
inside the receiver. Roll measurements are absolute between
the launch and the receiver.
1
2
3
4
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