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Common Causes

• Actual measurement value deviates from expected setpoint beyond the tolerance defined in _TDIF parameter
• Tool offset or tool length compensation data not properly stored or corrupted in tool table
• Probe calibration error or probe contact force inconsistent during measurement cycle
• Machine axis positioning error or backlash causing incorrect actual values during probing
• Cycle parameters (feed rate, probe speed) set too aggressively preventing accurate measurement

Troubleshooting Steps

1. 1Review the _TDIF parameter value in the active tool offset table and compare against actual measurement variance; increase tolerance if measurement scatter is consistent but within machine capability
2. 2Re-calibrate the probe using a certified master or calibration standard, verify consistent probe contact force and repeatability over multiple cycles
3. 3Check tool offset data in the tool table for the affected tool; clear corrupted entries and re-measure tool geometry using the measurement cycle with reduced feed rates
4. 4Perform a backlash and positioning accuracy test on the affected axes; run a dry run of the measurement cycle without cutting to isolate probe vs. positioning issues
5. 5Reduce feed rate and probe speed in cycle parameters, verify machine thermal stability, and confirm no mechanical play in spindle or probe holder before re-running the measurement cycle