Renishaw XM-60 multi-axis calibrator User Manual page 23

XM multi-axis calibrator
Testing precautions
Thermal stabilisation
• To meet the quoted specifications the XM system must be thermally stable.
• Thermal stability is achieved 45 minutes after the laser/launch and receiver
are powered on. Therefore it is recommended to turn the laser/launch and
receiver on at the earliest opportunity.
• The receiver and the launch must be removed from the case during the
thermal stabilisation period and should be placed at least 200 mm away from
each other.
• To avoid the need for further thermal stabilisation, once discharged the
receiver battery should be changed within 30 seconds:
Note: An uninterruptible power supply can be used when moving
XM from one machine to the next.
30
seconds
Mechanical set-up
• In order to take relative measurements between the tool and the workpiece,
the launch must always be attached to the structure that holds the
workpiece, i.e. the machine bed or the chuck on a lathe. See Appendix F for
XM set-up best practice.
• When the XM system is used on a
machine where the workpiece moves,
the conduit should be fixed to the
machine bed to stop it dragging,
misaligning, or causing the launch
to move during machine motion.
Magnetic cable clamps are included
in the kit for this purpose.
• There may be situations when sufficient magnetic force is not available to
securely mount the launch unit. This could occur when there is a requirement
for overhanging the launch unit, or the machine bed is not magnetic. In this
case, additional fixturing components (such as the Machine Tool Fixturing Kit
or other mounting accessories) may be required.
• In general, metrology performance is improved when the system is
used with fewer accessories. Use only the minimum amount of fixturing
components required to align the system to the axis under test.
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