6425

Check magazine location status in HMI: Navigate to Diagnostics > Tool Management > Magazine Status and verify the target location %4 shows as 'Free' or 'Empty'. Cross-reference with actual magazine state.

Do NOT issue tool movements while location status shows occupied.

Verify tool gripper/arm is fully retracted and not blocking access. Manually jog gripper away from magazine using MDI or Service > Manual > Tool Changer. Check parameter MD18080 (tool magazine type) configuration matches physical setup.

Monitor PLC signals for magazine location occupation via Diagnostics > System Info > PLC > Inputs. Confirm feedback signals from magazine sensors (typically DI inputs mapped to tool management) are reporting correctly. Cross-check FEPROM tool magazine database (MD18000-MD18100 range) for stale occupation records.

If location remains blocked, perform magazine reset: Navigate to Service > Tool Management > Reset Magazine, then reinitialize tool positions. This clears stale status flags in the SINUMERIK NCK database.

Magazine reset will require re-referencing all tool locations.

Access the tool database: Navigate to HMI > Diagnostics > Tool Management > Tool Data and select tool %2. Verify tool geometry (diameter, length, type) against the magazine location definition in the same menu under Magazine Locations.

Check machine data parameters MD18040 (tool magazine structure) and MD18050 (location-to-geometry mapping). Confirm location %4 is configured to accept the tool type in question. Cross-reference with parameter MD18070 (tool holder types) if using multi-holder pockets.

If geometry mismatch exists, either reassign the tool to a compatible location in the magazine or modify the tool data (length offset, diameter compensation) to fit the target location. Use HMI > Tool Management > Edit Tool to adjust tool geometry or select an alternate free location.

Changing tool geometry affects cutting performance; validate offsets post-modification.

Check tool magazine enable status in HMI: Navigate to Diagnostics > System Info > PLC > Outputs and verify the magazine enable signal (typically output bit assigned to tool changer control) is ON. Confirm no safety interlocks or maintenance blocks are active.

Review PLC program logic via Diagnostics > PLC > Source Code or Diagnostics > CyclicIO to identify any conditional locks on tool magazine operations. Look for FC/FB calls related to tool management (e.g., T_CHANGER_ENABLE, MAGAZINE_LOCK). Verify all prerequisite conditions are met (machine mode, axes homed, coolant status, etc.).

If safety interlock is active, confirm the interlock condition is resolved (e.g., machine is in AUTO mode, spindle is stopped, all doors closed). Reset the PLC if necessary via Service > PLC > Reset, then retry the tool placement command.

Do NOT bypass safety interlocks; resolve the underlying condition first.