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Access Diagnostics → Tool Management (via HMI or MDI) and verify the tool offset table (TOOL.T / TOOL.D entries). Confirm that D1 and D2 edges are defined for the active tool in the grinding cycle.

Do not modify offsets during active cycle execution.

In the NC program, verify the D parameter matches the physical tool edge geometry. Check the DEFS block or L-word in the grinding cycle for correct D1/D2 reference. Consult the tool offset compensation matrix in Parameters MD18110 (tool offset memory size).

If tool edges were recently created or modified, reinitialize the tool offset table via machine menu: Maintenance → Tool Data → Initialize. Restart the NCK with POWER ON and retry the grinding cycle.

This operation resets all active tool offsets.

Review MD10100 (tool management mode) setting. If set to 0 (disabled), the NCK cannot validate tool geometry. Enable tool management if grinding cycle setup function requires edge assignment validation.

In the active NC program block, identify the shoulder position parameter (typically programmed as SLTOF or geometric offset in the grinding cycle). Compare against machine limits in Parameters MD33200 (axis min) and MD33300 (axis max) for the grinding axis.

Verify tool length compensation by checking TOOL table entries and comparing TL (tool length) value against actual tool geometry. Use the Setup Grinding Wheel function to recalculate correct shoulder offset. Access via Machine → Tool Setup → Grinding Wheel Profile.

Incorrect tool length values cause positional errors on the grinding axis.

Check Parameter MD10120 (tool shoulder offset compensation enable) is set to 1. If disabled, the NCK cannot validate shoulder position geometry against the offset table, causing validation failure in the setup function.

Verify the SINUMERIK version via HMI: Diagnostics → System Information. Cross-reference the grinding cycle program header comment with supported NCK version. Update the cycle library if version conflict is detected.

If using custom grinding cycle subroutines, check CYCLE definition for D1/D2 parameter declarations. Ensure SLTOF and shoulder position syntax matches current SINUMERIK command set (consult SINUMERIK Programming Guide, Part 1).