292-0016

Check Reference Point Status

Press REF key and observe the reference point menu. Look for axes showing red indicators or 'NOT REF' status.

Use soft key 'SHOW ALL AXES' to verify all configured axes are displayed

Execute Reference Point Search

Select unreferenced axes using arrow keys, then press NC START to begin reference point search sequence.

Ensure machine area is clear and all guards are closed before starting reference search

Verify DCM Activation

After successful referencing, check MOD function 'COLLISION MONITORING' to confirm DCM status shows 'ACTIVE'.

DCM activation may take 5-10 seconds after referencing is complete

Check Reference Switch Signals

Navigate to MANUAL mode, press MOD key, select 'DIAGNOSIS' then 'INPUT SIGNALS' to monitor reference switch states (typically X24, X25, X26 inputs).

Reference switches should show '0' when not activated and '1' when mechanically triggered

Verify Machine Parameters

Access Setup menu, select 'MACHINE PARAMETERS', check MP1410.x (Reference point search) and MP1420.x (Reference switch evaluation) for correct settings.

Only modify machine parameters with proper authorization and documentation

Test Manual Reference Movement

In MANUAL mode, slowly jog each axis toward reference position while monitoring switch signals to identify faulty switches.

Use incremental jog (0.01mm steps) when approaching reference switches

Check Encoder Diagnostics

Access MOD menu, select 'DIAGNOSIS', then 'POSITION VALUES' to examine encoder status and error counters for each axis.

Look for 'REF MARK ERROR' or 'ENCODER FAULT' messages in the diagnostic display

Verify Encoder Parameters

Check machine parameters MP2210.x (Encoder type) and MP2220.x (Reference mark evaluation) to ensure correct encoder configuration.

Encoder parameter changes require machine re-commissioning

Perform Encoder Reference Test

Execute slow reference point search while monitoring encoder signals in diagnostic menu to identify reference mark detection failures.

Multiple failed reference attempts at same position indicate encoder reference mark damage

Verify DCM Machine Parameters

Check Setup menu, 'MACHINE PARAMETERS', examine MP7440 (DCM activation), MP7441 (monitored axes), and MP7442 (DCM operating mode).

MP7441 bit pattern must match actual machine axis configuration

Check Kinematic Configuration

Access Setup menu, select 'KINEMATIC CONFIGURATION' to verify all axes defined in DCM are properly configured in machine kinematics.

Kinematic changes affect machine coordinate system and require careful validation

Reset DCM System

Use MOD function 'COLLISION MONITORING', select 'RESET DCM' to reinitialize the collision monitoring system after parameter corrections.

DCM reset requires all axes to be referenced again before reactivation

Check System Error Log

Press MOD key, select 'DIAGNOSIS', then 'ERROR MESSAGES' to review system fault history for related encoder or reference errors.

Note error timestamps to correlate with reference point failures

Verify Control Voltage Levels

Use diagnostic menu to check +5V, +15V, and +24V supply voltages to encoders and reference switches are within specification.

Low voltage levels can cause intermittent reference point failures

Perform Control System Restart

Execute controlled shutdown and restart of TNC system to clear potential software faults affecting reference point processing.

Allow 30 seconds between shutdown and restart for complete system reset