585

Check spindle parameters related to tool measurement (check parameters 4900-4999 series for measurement settings and sensor configuration).

Inspect the spindle-mounted measurement probe or sensor for physical damage, contamination, or loose wiring connections.

Ensure spindle is stopped and locked out before inspection

Clean the measurement probe contact surfaces and sensor windows with appropriate solvent to remove chips, coolant residue, and debris.

Test sensor continuity and voltage output using a multimeter; replace sensor if readings are outside specifications in the maintenance manual.

Trace and inspect the measurement signal cable from the spindle sensor through the rotary joint/slip ring to the spindle drive terminal block.

Power off system and follow LOTO procedures before cable inspection

Check cable connections at both the sensor end and drive/CNC end for corrosion, looseness, or bent pins; reseat all connections firmly.

Measure cable continuity and insulation resistance; check for shorts between signal wires and ground or between individual conductors.

If cable passes through a rotary joint, inspect the slip rings for wear or contamination and clean or replace as needed.

Review and verify spindle tool measurement parameters (typically 4900-4950 range) against machine manufacturer specifications for sensor type and measurement mode.

Check measurement timeout parameter settings and increase timeout value if measurements are occurring but exceeding time limits.

Verify the G-code or macro program calling the tool measurement cycle is using correct syntax and specified tool measurement commands.

Perform a manual test measurement cycle at reduced feedrate to verify sensor triggering and signal detection; observe diagnostic screens for sensor state changes.