Renishaw OMP40-2 Manual page 47

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Calibration out of date and/or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