61302

Navigate to Diagnostics > Alarms in the HMI. Verify the probe tool number and check MD 32510 (PROBING_PROBE_DIAMETER) and MD 32511 (PROBING_STYLUS_LENGTH) against actual physical probe dimensions using calipers.

Measure the probe spigot OD at the narrowest point; undersizing this parameter by even 2-3mm can cause collisions with tight fixtures.

Correct the probe geometry parameters: Access Setup > Machine Data > Probe/Measuring (MD 32500 series) and update the spigot diameter to match actual hardware specifications. Confirm tool offset entry matches probe serial number.

Execute a dry run of the measuring cycle using MDI with DRY_RUN enabled to visualize the probe path without executing spindle rotation. Observe collision detection in the NCK trace log.

Perform a test cycle on scrap material with reduced feed rates (parameter MD 32520 PROBING_DISTANCE_MAX reduced by 50%) to confirm clearance before returning to production parameters.

In the part program or measuring cycle definition, identify the DIST (measuring distance) parameter value. Cross-reference against the actual physical distance from the probe's retracted Z-height to the measurement point using manual DRO positioning or workpiece documentation.

Check for fixture height changes or workpiece clamping variations between setups that may reduce available clearance below the programmed distance.

Reduce the measuring distance parameter by 10-20% as a safety margin. Update the cycle call in the part program (e.g., MEAS_POS(DIST=XX.X)) or modify the machine data MD 32520 PROBING_DISTANCE_MAX to reflect actual safe approach distance.

Enable detailed collision diagnostics: Set MD 32541 PROBING_COLLISION_SENSITIVITY to medium (if available) and check the NCK trace log (Diagnostics > Trace > Probe Collision) to identify the exact Z-height where contact was detected.

Retest the measuring cycle and confirm that the probe clears all fixture components before stylus contact with the workpiece measurement surface.

Physically inspect the workpiece setup and fixture arrangement in the machine. Verify that clamps, parallels, magnetic chucks, or workholding devices do not protrude into the Z-axis approach corridor directly above the measurement point. Compare current setup against setup prints or previous successful runs.

Look for worn or bent clamps and check that parallels are not higher than nominal due to chip buildup or debris under the workpiece.

Reposition the workpiece to lower its height or move it laterally to clear the probe approach path. Verify with manual jog moves that the probe can move from its park position to above the measurement point without obstruction.

If using a pallet or fixture plate, check MD 32545 (if applicable, fixture offset compensation) and confirm the fixture reference is correct. Review the work offset (G54-G59) and verify the workpiece is within the expected envelope defined in the machine setup parameters.