1A0-018A

Check current kinematics configuration

Navigate to Setup > Machine > Kinematics and verify which axes are currently active in the kinematic chain.

Use MOD function to display the current kinematic status in real-time

Verify handwheel axis assignment

Check machine parameter MP7680.x (handwheel assignment) to confirm which physical axis the handwheel is trying to control.

Do not modify handwheel parameters without understanding the complete machine configuration

Activate required kinematics

If the axis should be active, use FUNCTION TURNDATA AXIS or appropriate kinematic switching command to activate the required axis configuration.

Check if a specific tool or setup requires different kinematics to be active

Examine handwheel machine parameters

Check MP7680.0 through MP7680.2 for handwheel axis assignments and verify they correspond to valid physical axes defined in MP1010.x series.

Always backup machine parameters before making changes

Verify axis configuration parameters

Review MP1010.x (axis names) and MP1020.x (axis types) to ensure the handwheel-assigned axis exists as a physical axis.

Use the parameter search function to quickly locate all handwheel-related parameters

Cross-reference with PLC configuration

Check PLC program for handwheel input assignments and verify they match the machine parameter configuration in the axis interface.

Look for M7680.x markers in the PLC that correspond to handwheel axis selection

Check active coordinate transformations

Review current PLANE function status and any active kinematic transformations that might make certain axes unavailable for direct handwheel control.

Use PLANE RESET to temporarily disable transformations for testing

Verify 5-axis transformation status

If using 5-axis machining, check if M128 (transformation ON) is active and conflicting with handwheel axis assignment.

Disabling transformations during machining can cause crashes - only test in safe conditions

Review handwheel superimposition settings

Check if handwheel superimposition is enabled for transformed coordinates vs. machine coordinates in the handwheel operating mode.

Some TNC versions allow handwheel operation in both machine and workpiece coordinate systems

Check axis status and drive ready signals

Verify all axes show 'ready' status in the axis status display and check for any drive fault indicators on the affected axis.

Drive faults may indicate serious hardware issues requiring immediate attention

Perform axis reference check

Ensure the problematic axis has completed its reference run and is properly homed using the reference point function.

Some systems require all axes to be referenced before handwheel superimposition is available

Test axis movement capability

Attempt manual axis movement in MDI mode to verify the axis is physically capable of motion before enabling handwheel control.

Always ensure safe machine conditions before testing axis movement

Verify current operating mode

Check if the TNC is in an operating mode that supports handwheel superimposition (typically Manual or Electronic Handwheel modes).

Some modes like automatic operation may restrict handwheel access to certain axes

Check safety interlock status

Verify that all required safety conditions are met, including door interlocks, emergency stops, and axis enable signals.

Never bypass safety interlocks - resolve the underlying safety condition

Review PLC handwheel enable logic

Check PLC program for conditional logic that may disable handwheel superimposition based on machine state or operating conditions.

Look for M7681.x markers that control handwheel enable/disable functions