231-93A0

Access machine parameters

Press MOD key, select 'Machine Parameters' from TNC menu, navigate to drive configuration section.

Ensure machine is in safe state before accessing parameters

Locate iCtrlDiffFreqFF parameter

Search for parameter 'iCtrlDiffFreqFF' for the affected axis using parameter search function.

Use Ctrl+F in parameter view for quick search

Verify motor type configuration

Check motor type parameter to confirm linear motor configuration, then disable PDT1 feedforward by setting iCtrlDiffFreqFF to 0.

Document original parameter values before making changes

Reset and test

Perform control reset (Ctrl+Alt+Del) and test axis movement to verify alarm clearance.

Perform test movements at reduced feedrate initially

Enter machine parameter mode

Access TNC machine parameters via MOD key, authenticate with appropriate access level (typically OEM level required).

OEM password required for drive parameters

Check motor configuration

Verify motor type parameters for affected axis to confirm asynchronous motor setup in drive configuration.

Cross-reference with electrical drawings to confirm motor type

Disable PDT1 feedforward

Set iCtrlDiffFreqFF parameter to 0 (disabled) for the affected axis to match asynchronous motor capabilities.

Consider alternative feedforward methods suitable for asynchronous motors

Validate configuration

Cycle power to drive system and verify alarm does not recur during axis reference and movement.

Ensure all axes are properly referenced after parameter changes

Physical motor verification

Inspect motor nameplate and compare with machine documentation to determine actual motor type installed.

Verify motor power is off before physical inspection

Access drive parameters

Navigate to TNC machine parameters, locate motor type configuration parameters for the affected axis.

Take screenshots of current parameters before modifications

Correct motor type setting

Update motor type parameter to match physically installed synchronous motor, ensuring compatibility with PDT1 feedforward.

Verify encoder type parameters also match synchronous motor requirements

Recalibrate drive

Perform drive auto-tuning sequence to optimize parameters for corrected motor type configuration.

Auto-tuning requires axis movement - ensure clear travel path

Check parameter backup

Access TNC file management, locate most recent parameter backup file (.PAR) from before alarm occurrence.

Regular parameter backups should be stored on network drive

Compare current vs backup parameters

Use TNC parameter comparison function to identify differences in drive-related parameters, particularly iCtrlDiffFreqFF.

Focus on parameters modified within last software update timeframe

Restore correct parameters

Selectively restore drive parameters from backup or manually correct iCtrlDiffFreqFF based on motor type requirements.

Avoid full parameter restore without understanding all changes

Document and verify

Create new parameter backup after corrections and test all axis functions to ensure proper operation.

Update parameter change log with correction details