Troubleshooting
5.4 No head movement
Table 12 - No head movement
Possible cause Checks/remedies
Power loss Check controller POWER ON LED is lit.
Check mains cable connections and integrity,
observing electrical safety precautions (see page 7).
Check controller fuse, observing electrical safety
precautions (see page 7).
Check CMM emergency stop condition - power may
have been removed from the system by the CMM.
Cable/connections faulty Check conditions and integrity of cabling from head to
controller.
5.5 Datum error
The DATUM ERROR LED is lit on the controller. The head has rotated to the required
position but locked in a non-repeatable condition (a maximum of four attempts to lock
will be made before the error is reported).
Table 13 - Datum error
Possible cause Checks/remedies
Cable/connections faulty Check conditions and integrity of cabling from head to
controller.
Head/stylus configuration
obstructed
Remove obstruction and update head using the HCU1
or under CMM control.
Probe extension
combination too long
Use shorter/lighter styli combination.
Internal head fault Contact your Renishaw representative, CMM
manufacturer or distributor.
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