330-00C6

Check handwheel axis assignment

Press MANUAL key, then check the axis assignment display. Verify only one axis shows active handwheel assignment (highlighted or selected).

Clear multiple axis selections

Press the axis selection keys (X, Y, Z, etc.) to deselect all axes, then select only the desired single axis for handwheel operation.

Verify handwheel increment setting

Check that handwheel increment is properly set via the increment selection keys (0.1, 0.01, 1.0, etc.) and not causing unintended axis coupling.

Use the axis direction keys to ensure clean single-axis selection before engaging handwheel.

Test handwheel in different axis modes

Select each axis individually (X, Y, Z) and test handwheel movement. Note if alarm occurs with specific axis selections or all axes.

Check handwheel cable connections

Inspect handwheel cable at both ends for loose connections, damaged pins, or corrosion at the TNC connection and handwheel unit.

Power down system before checking electrical connections.

Monitor encoder signals in diagnostics

Access MOD function, select system diagnostics, and monitor handwheel encoder A/B channel signals for noise, missing pulses, or cross-channel interference.

Test with alternate handwheel

If available, connect a known good handwheel unit to isolate whether issue is in the handwheel device or TNC input processing.

Check machine parameter MP7680 for handwheel input configuration and signal processing settings.

Verify operating mode selection

Check that only MANUAL mode is active. Press MANUAL key and ensure no other operating mode keys (AUTO, MDI) are simultaneously highlighted.

Clear any active program or MDI commands

Press STOP key, then MANUAL key to ensure no background program execution or MDI commands are active that could conflict with handwheel operation.

Reset TNC operating mode

Perform soft reset by pressing CTRL+ALT+DEL or use END+RESET sequence to clear any mode conflicts and return to clean manual operation state.

Check MP7300 series parameters for handwheel operating mode restrictions and multi-axis prevention settings.

Check handwheel machine parameters

Access MOD function, select machine parameters, and verify MP7680-MP7689 handwheel configuration parameters for proper single-axis operation setup.

Verify axis coupling parameters

Check MP1080-MP1089 for any unintended axis coupling or gantry configurations that might cause multi-axis movement during handwheel operation.

Review manual mode parameters

Examine MP7300 series parameters for manual operation restrictions and ensure proper single-axis handwheel operation is enabled.

Document original parameter values before making changes.

Compare with backup parameters

If available, compare current machine parameters with known good backup or factory defaults to identify any incorrect handwheel-related settings.

Test axis movement individually

Use axis direction keys (+/-) to move each axis separately and check for smooth movement without binding or unusual servo behavior.

Check servo following errors

Access position display and monitor following error values during handwheel operation to identify any axes showing unexpected position deviations.

Inspect mechanical systems

Check for mechanical binding, worn ways, or coupling issues that might cause unintended movement in non-selected axes during handwheel operation.

Ensure machine is properly supported and secured before mechanical inspection.