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Access Tool Management

Navigate to HMI → Parameters → Tool Management → Tool Data to review active tool compensation values.

Use the tool list filter to quickly locate tools with active compensation

Verify Compensation Limits

Check MD18102 (MAX_CUTTING_EDGE_LENGTH) and MD18104 (MAX_TOOL_RADIUS) against current tool offset values in the tool table.

Compensation values exceeding machine data limits will trigger this alarm

Correct Invalid Values

Edit tool offset table entries that exceed limits or contain non-numeric data, ensuring all compensation values are within MD-defined ranges.

Use the tool measurement function to automatically populate accurate compensation values

Verify Tool Existence

Check if the T-number called in the program exists in HMI → Parameters → Tool Management → Tool List with valid geometry data.

Look for red warning indicators next to tool entries in the tool list

Validate Tool Geometry

Ensure tool length (geometry offset) and radius values are properly defined and not showing as '0' or 'undefined' in the tool data.

Tools with undefined geometry cannot activate compensation properly

Recreate Tool Entry

Delete and recreate the problematic tool entry with complete geometry data, or restore from backup if tool data corruption is suspected.

Use the tool template function to ensure all required parameters are populated

Review Program Block

Examine the NC block where alarm occurs, checking for proper G41/G42 (radius comp) or G43 (length comp) syntax and tool call sequence.

Compensation must be activated with a movement command, not in a standalone block

Verify Approach Geometry

Ensure adequate approach distance exists before compensation activation - minimum distance should exceed tool radius for G41/G42.

Insufficient approach geometry can cause compensation calculation errors

Check Compensation Cancellation

Verify previous compensation was properly cancelled with G40 before attempting to start new compensation in the current program block.

Use single-block mode to step through compensation activation sequence

Check Compensation Machine Data

Review MD20200 (CUTCOM_MAXNUM_CHECK_BLOCKS) and MD20210 (CUTCOM_FORWARDLOOK) settings in HMI → Commissioning → Machine Data.

Default values are usually sufficient unless special machining requirements exist

Verify Tool Management Settings

Check MD18080 (TOOL_MANAGEMENT_MASK) and MD18090 (TOOL_MANAGEMENT_DEFAULT_DATA) for proper tool handling configuration.

Incorrect tool management settings can prevent compensation activation

Reset to Default Values

If machine data appears corrupted, reset compensation-related MD to Siemens default values and perform a control restart.

Document current MD values before making changes for easy rollback if needed