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Check NC program for M3, M4, or M5 commands issued after transformation activation. Review the part program logic and synchronized action blocks (WHENEVER statements in ShopMill or equivalent G-code sync actions).

Verify transformation configuration in HMI: Navigate to Diagnostics → Machine Data → Axis Data and check MD20050 (TRAFO_TYPE_SEL) for the channel. Confirm spindle participation in transformation via MD20060-MD20062 (transformation axis assignment).

Restructure NC logic to deactivate the transformation (via TRAFOOF or equivalent deactivation command) before issuing spindle mode changes. Alternatively, ensure spindle commands occur only when transformation is inactive.

Deactivating a transformation mid-cycle can cause position loss; plan deactivation during safe zones or tool changes only.

Test corrected program in DRY RUN mode (Diagnostics → Program Execution → Dry Run) to verify spindle commands no longer conflict with transformation state.

Audit NC program for M41-M45 (gear range) commands executed within the transformation active zone. Check part program structure and tool change sequences where gear shifts typically occur.

Verify spindle is configured with multiple gears and transformation is enabled: Check HMI Machine Data for MD22400 (SPINDLE_NUM_GEAR_STEPS) and confirm MD20050 transformation type is active for this spindle.

Insert TRAFOOF (deactivate transformation) before M41-M45 commands, perform the gear shift, then reactivate transformation with TRAFO command. Ensure safe machine state (spindle stopped, axes parked) during mode transitions.

Transformation deactivation can cause axis/spindle position jumps if not properly synchronized; use tool change or safe-zone windows.

Access HMI: Diagnostics → Machine Data → Transformation Parameters. Review MD20050 (transformation type), MD20060-MD20062 (axis assignment indices), and MD20080 (transformation offset/orientation) to confirm spindle is intentionally declared as a transformed axis.

Cross-reference machine documentation and kinematic definition. Verify that the spindle assignment in machine data matches the intended kinematic model. If spindle should not be part of transformation, correct the axis assignment parameters.

Editing machine data without understanding the complete kinematic chain can cause unsafe axis behavior; consult machine builder documentation.

If spindle must be removed from transformation, clear or reassign MD20060-MD20062 to exclude the spindle axis number. Save machine data and warm-start the NCK (Diagnostics → Restart → Warm Start).