8.3
Fault-finding
Symptom Cause Action
Poor probe repeatability
and/or accuracy.
Debris on part or stylus. Clean part and stylus.
Poor tool change repeatability. Redatum probe after each tool
change.
Loose probe mounting on shank
or loose stylus.
Check and tighten as appropriate.
Excessive machine vibration. Enable enhanced trigger lter.
Eliminate vibrations.
Calibration out of date and/or
incorrect offsets.
Review probing software.
Calibration and probing speeds
not the same.
Review probing software and
make speeds the same.
Calibration feature has moved. Correct the position.
Measurement occurs as stylus
leaves surface.
Review probing software.
Measurement occurs within
the machine’s acceleration and
deceleration zone.
Review probing software and
probe lter settings.
Probing speed too high or too
slow.
Perform simple repeatability trials
at various speeds.
Temperature variation causes
machine and workpiece
movement.
Minimise temperature changes.
Machine tool faulty. Perform health checks on
machine tool.
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