230-0475

Access machine parameter menu

Press MOD key, select 'Machine Parameters', navigate to spindle configuration parameters MP7xxx series.

Use search function with '747' to quickly locate spindle fast input parameters

Check MP7470 series parameters

Examine MP7470.x (Fast input assignment for spindle x) and verify if fast input channels are assigned.

Document current settings before making changes

Review IOC file configuration

Access IOC file via TNCopt or file manager, search for FAST_INPUT entries related to spindle encoder signals.

Look for entries like 'FAST_INPUT_SPINDLE_x' in the IOC configuration

Remove duplicate configuration

Delete either the IOC file entry or clear the machine parameter assignment, keeping only one configuration method active.

Machine parameter configuration takes priority over IOC settings

Check software version compatibility

Press MOD key, select 'System Info' to verify TNC software version and compare with IOC file date stamp.

IOC files older than 6 months before software version may need updating

Load default IOC template

Navigate to TNCopt, load appropriate IOC template for current software version and machine configuration.

Backup current IOC file before loading new template

Merge custom settings

Carefully transfer any custom IOC settings from backup to new template, avoiding spindle fast input duplications.

Use text comparison tools to identify differences between old and new IOC files

Validate configuration

Restart TNC system and verify alarm clears, test spindle operation and encoder feedback functionality.

Perform spindle orientation test to ensure encoder signals are properly configured

Identify active spindle count

Check MP7440 (Number of spindles) to determine how many spindles are configured in the system.

Cross-reference with actual machine spindle hardware configuration

Review each spindle's fast input assignment

Check MP7470.0, MP7470.1, etc. for each configured spindle to identify duplicate fast input channel assignments.

Each spindle must use unique fast input channels

Reassign fast input channels

Modify machine parameters to assign unique fast input channels to each spindle (typically X81, X82, X83, etc.).

Consult machine electrical drawings for correct fast input channel assignments

Clear alarm and test

Reset alarm with CE key, cycle power to TNC, and test each spindle's encoder feedback independently.

Verify spindle positioning accuracy after reassignment

Check fast input hardware status

Access PLC program, monitor fast input status in NC/PLC interface to identify which channels are active.

Use PLC status display to see real-time fast input channel utilization

Review complete fast input assignment

Check all MP747x parameters for axes and spindles to identify conflicting fast input channel assignments.

Document all current assignments before making changes

Reassign conflicting channels

Modify machine parameters to use available fast input channels, ensuring no overlap between axes and spindles.

Reserve lower numbered channels (X81-X84) for spindles, higher numbers for axes