905-274D

Access Tool Table

Press TOOL TABLE softkey, then select TOOL.T to open the tool definition table.

Use Ctrl+F to quickly search for specific tool numbers in large tool tables

Verify Tool Entry

Check if the called tool number exists and has entries for LENGTH (L) and RADIUS (R) columns with non-zero values.

Never enter negative values for tool radius as this will cause calculation errors

Define Missing Tool Data

Enter tool length, radius, and tool type (TYPE column) for the missing tool. Set NAME field for identification.

Use tool type 'MILL' for end mills, 'DRILL' for drills, and 'TAP' for tapping tools

Save and Test

Press END key to save changes, then test the tool call in MDI mode using T[tool number] M6 command.

Check Tool Compensation Table

Navigate to TOOL TABLE and verify TOOL.T entries for DL (delta length) and DR (delta radius) values.

DL and DR values can be zero initially but LENGTH and RADIUS must have valid measurements

Verify Tool Geometry

Ensure LENGTH column contains actual tool length measurement and RADIUS contains cutting radius, not diameter.

Entering diameter instead of radius is a common error that causes machining inaccuracies

Set Tool Type Parameter

Verify TYPE column has correct tool type designation matching the intended machining operation.

Tool type affects how the TNC applies compensation calculations in cycles

Update Tool Status

Check LBREAK and RBREAK columns are set to appropriate values (typically 0 for new tools).

Review Active Program Line

Check the current program line for proper T[number] M6 syntax and verify tool number is within valid range (typically 1-32000).

Use F7 to step through program line by line to identify the exact problematic tool call

Validate Tool Number Range

Ensure called tool number matches available tools in TOOL.T table and doesn't exceed machine parameter limits.

Some machines have restricted tool number ranges defined in machine parameters

Check Cycle Requirements

If alarm occurs during canned cycle execution, verify the cycle-specific tool requirements are met in tool definition.

Drilling cycles require specific tool types and geometry data to calculate proper feed rates

Correct Program Syntax

Edit the program to use correct tool call format: T[tool number] M6, ensuring proper spacing and syntax.

Backup Current Tool Table

Use file manager to copy TOOL.T to backup location before attempting repairs.

Always backup tool tables before making major changes to prevent data loss

Check Table Integrity

Open TOOL.T in table view and scan for obviously corrupted entries, special characters, or formatting errors.

Look for entries with asterisks (*) which indicate calculation errors or invalid data

Clear Corrupted Entries

Delete or reset any corrupted tool entries by selecting the row and using DEL key, then re-enter correct data.

Use RESET TABLE function if corruption is extensive, but this clears all tool data

Restore from Backup

If corruption is severe, restore TOOL.T from a known good backup file using file manager operations.

Check Tool Management Parameters

Access machine parameters (MP) and review tool-related settings, particularly MP7411 (tool table) and MP7420 series.

Only qualified personnel should modify machine parameters

Verify Tool Number Limits

Check if machine parameters restrict the range of allowable tool numbers and ensure called tools are within limits.

Some machines have separate parameters for manual and automatic tool changers

Review Tool Change Parameters

Examine parameters related to tool change operations and tool table validation requirements.

Parameter MP7440 often controls tool table validation behavior

Contact Service Engineer

If parameter issues are identified, contact qualified service personnel to modify machine parameters safely.