231-8B10

Access Motor Configuration

Press MOT key, then select the affected axis from the motor table display.

Always note the current DIR value before making changes for easy rollback.

Check DIR Parameter

Locate the DIR parameter for the affected axis. Value should be 0 or 1 depending on motor wiring configuration.

Ensure machine is in safe position before testing direction changes.

Toggle DIR Setting

Change DIR from 0 to 1 or 1 to 0, then save the parameter change and cycle power to the control.

Test with small incremental moves (0.1mm) before full operation.

Verify Correction

Execute small positive and negative moves in MDI mode to confirm direction correspondence matches commanded direction.

Power Down System

Turn off main power and lock out electrical supply before accessing motor connections.

Always follow LOTO procedures and verify zero energy state with meter.

Inspect Motor Connections

Check motor power cable connections U, V, W phases at both motor terminal box and drive amplifier output.

Take photos of current wiring before making changes for reference.

Swap Two Phases

Interchange any two of the three motor phases (typically U and V) at either the motor or amplifier end.

Ensure all connections are tight and properly torqued per manufacturer specifications.

Test Operation

Restore power and test axis movement with small incremental moves to verify correct direction.

Access Encoder Parameters

Navigate to encoder configuration table (ENC) and select the affected axis encoder settings.

Document current encoder parameter values before making changes.

Check Encoder Direction

Verify encoder direction parameter or consider reversing encoder A/B signal connections if accessible.

Encoder signal reversal may require recalibration of reference point.

Verify Signal Integrity

Use TNC diagnostic screens to monitor encoder signals during manual axis movement.

Look for clean quadrature signals without noise or dropouts.

Re-establish Reference

Perform reference point procedure after encoder corrections to ensure proper position tracking.

Access Drive Parameters

Connect to drive amplifier using appropriate software tool (Heidenhain DriveTool or similar).

Ensure proper communication cable and software version compatibility.

Review Direction Settings

Check drive internal direction parameters and compare with TNC motor table DIR setting.

Both TNC and drive direction settings should complement each other, not fight.

Coordinate Settings

Adjust either TNC DIR parameter or drive direction setting to achieve proper coordination.

Only change one direction setting at a time to avoid confusion.

Save and Test

Save all parameter changes and perform comprehensive movement testing in both directions.