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Access NCK > Spindles > Spindle Parameters menu. Verify MD22330 (max spindle speed) and MD22331 (spindle ramp limit/acceleration) for the slave spindle in question. Compare against actual demanded speed from G96/G97 and electronic gearing ratio settings.

Do not modify these parameters without validating against machine mechanical limits and drive specifications.

Review the part program block (%2 reference in alarm). Check G33 (electronic gearing) or SPIND_COUPLE commands and verify the coupling ratio (COUPLE_RATIO parameter). Calculate: slave_demanded_speed = master_speed × coupling_ratio.

Increase MD22330 if mechanically feasible and drive permits. Alternatively, reduce the electronic gearing coupling ratio in the part program or increase ramp time via MD22331 to allow smoother velocity transitions.

Verify spindle drive amplifier maximum speed rating before increasing MD22330.

Navigate to NCK > Spindles > Spindle Parameters. Extract MD22340 and MD22341 for the affected slave spindle. Cross-reference these values against the motor drive specifications and thermal limitations documented in machine commissioning records.

Analyze the part program block triggering the alarm. Identify the rate of master spindle speed change and required slave synchronization window. Calculate required acceleration: accel_required = (speed_delta / sync_time).

If acceleration headroom is insufficient, increase MD22340/MD22341 incrementally (typically 10-20% steps). Alternatively, extend the synchronization dwell time in the part program using G04 (dwell) before the coupling command to allow gradual speed approach.

Monitor spindle motor temperature and drive current during test runs after parameter changes.

Check MD22360 and MD22361 (spindle coupling gain and damping factors) in NCK > Spindles > Spindle Parameters. Review whether these parameters were optimized during commissioning for the specific load inertia and drive response.

In the affected part program block, identify rapid master speed transitions (e.g., G96 with high feed rate ramps, or SPIND_COUPLE commands with steep profile slopes). Use block trace or simulation to plot master vs. slave velocity.

Reduce the electronic camming demand by: (a) lowering MD22360 coupling gain slightly (5-10% reduction), (b) increasing ramp profiles in G33/electronic gearing commands, or (c) inserting preparatory G04 dwell blocks to allow servo settling. Test incrementally.

Aggressive gain reduction may degrade synchronization accuracy; validate runout and phase lag after adjustment.