905-275A

Access Machine Parameters

Press MOD key, select 'Machine Parameters', navigate to MP7500 series parameters for the affected axis.

Always backup current parameters before making changes using the data backup function.

Verify Transmission Ratio Settings

Check MP7500.x (numerator) and MP7501.x (denominator) values match your machine's actual gear ratios and lead screw pitch.

Incorrect ratios can cause dangerous axis movements - verify with machine documentation.

Calculate and Update Parameters

Calculate correct ratio: (motor revolutions × gear ratio) / (table movement per motor revolution). Update MP7500.x and MP7501.x accordingly.

Use the TNC's built-in calculator function (CALC key) for precise calculations.

Restart Control System

Perform a complete TNC restart (CTRL+ALT+DEL) to activate new transmission ratio parameters.

Ensure all axes are in safe positions before restart.

Access Encoder Diagnostics

Navigate to MOD → Diagnosis → Encoder → select affected axis to view EnDat encoder status and parameters.

Document current encoder readings before making changes.

Check Encoder Transmission Data

Verify the encoder's internal transmission ratio matches machine parameter settings. Look for 'Transmission ratio' field in encoder diagnostics.

Never attempt to modify encoder internal parameters without proper authorization.

Validate Cable Connections

Inspect EnDat cable connections at both encoder and TNC ends. Check for proper shielding and secure connections.

Use the TNC's cable test function in encoder diagnostics to verify signal integrity.

Reinitialize Encoder Communication

Use 'Initialize encoder' function in encoder diagnostics menu to re-establish proper communication and parameter exchange.

Encoder initialization will require axis reference point establishment.

Access Drive Interface Diagnostics

Navigate to MOD → Diagnosis → Drive → select affected axis to view drive communication status and transmitted parameters.

Check communication cycle time - values over 4ms indicate potential issues.

Compare Drive and TNC Parameters

Verify drive's transmitted gear ratio matches TNC machine parameters MP7500.x/MP7501.x for the same axis.

Mismatched parameters can cause unexpected axis behavior during operation.

Check Drive Configuration Software

Use manufacturer's drive configuration software to verify internal gear ratio settings match mechanical configuration.

Save drive parameter backup before making any changes to drive configuration.

Synchronize Parameters

Update either drive parameters or TNC machine parameters to ensure consistency. Restart both drive and TNC systems.

Always verify axis movement direction and scaling after parameter changes.

Check Bus Diagnostics

Navigate to MOD → Diagnosis → Communication → select active fieldbus to view timing statistics and error counters.

Look for increasing error counters or cycle time violations as indicators of bus problems.

Verify Bus Termination

Check that fieldbus network has proper termination resistors at both ends of the bus segment.

Improper termination can cause intermittent communication errors and data corruption.

Inspect Cable Quality

Examine fieldbus cables for damage, proper shielding, and correct cable type specification for the bus protocol used.

Use a fieldbus tester or oscilloscope to verify signal quality if available.

Optimize Bus Configuration

Adjust bus cycle time parameters if possible, or reduce the number of nodes to improve communication reliability.

Changes to bus timing may affect overall machine cycle time performance.