280-0842

Access tool table

Press TOOL TABLE softkey, then select TOOL.T to view current tool assignments and wheelhead positions.

Use F3 to toggle between different table views for easier analysis

Verify wheelhead position

Manually inspect the wheelhead position referenced in the alarm to confirm if a tool is physically present.

Ensure spindle is stopped and locked before manual inspection

Update tool table entry

Either install the missing tool at the specified position or delete the tool table entry by setting LENGTH and RADIUS to 0 and clearing the tool name.

Use TOOL CALL 0 to deselect current tool before making table changes

Reset alarm and test

Press CE key to clear alarm, then execute a test tool change to verify the correction.

Use single block mode for initial testing after tool table modifications

Check position display

Access machine parameters MP7440.x (wheelhead position feedback) to verify current position reading matches physical wheelhead position.

Compare displayed position with physical position markers on wheelhead

Perform reference run

Execute wheelhead reference cycle using manual mode to re-establish position reference and clear any position drift.

Ensure wheelhead path is clear before initiating reference cycle

Test position accuracy

Command wheelhead to move to known tool positions and verify physical alignment with position display.

Use incremental positioning commands for precise position verification

Check sensor connections

Inspect encoder cables and connections at wheelhead motor and TNC input modules for loose or damaged connections.

Power down system before checking electrical connections

Inspect wheelhead thoroughly

Visually check all wheelhead positions for missing tools, paying attention to tool holders that may appear seated but are actually loose.

Gently tap tool holders to verify they are properly seated and locked

Check machine area for dropped tools

Look around machine base, chip conveyor, and coolant tank for tools that may have fallen during operation.

Use lockout/tagout procedures when checking inside machine enclosure

Verify tool holder condition

Examine tool holders for wear, damage, or contamination that could cause tools to not seat properly in wheelhead.

Clean tool holder tapers with appropriate solvent and inspect for nicks or wear

Update tool management

Either reinstall missing tool or update TOOL.T table to reflect actual wheelhead configuration, ensuring LENGTH and RADIUS values are cleared for empty positions.

Check indexing accuracy

Command wheelhead to index through all positions while observing physical movement and position feedback in machine parameter MP7440.x.

Listen for unusual noises during indexing that might indicate mechanical binding

Verify servo parameters

Check machine parameters MP1020.x (servo loop parameters) for wheelhead axis to ensure proper gain and following error settings.

Document original parameter values before making any changes

Inspect mechanical components

Check wheelhead drive mechanism, including gears, belts, or direct drive coupling for wear, damage, or contamination.

Look for metal chips or debris that could interfere with precise positioning

Calibrate wheelhead positions

Perform wheelhead calibration procedure using machine parameter setup to re-establish accurate position relationships.

Use a dial indicator to verify mechanical repeatability before electronic calibration

Review active program

Examine the NC program at the point where alarm occurred, focusing on TOOL CALL statements and T-number references.

Use program search function to find all TOOL CALL instances in the program

Cross-reference tool table

Compare called tool numbers in program with actual tool assignments in TOOL.T table to identify mismatches.

Print tool list from TOOL.T for easy comparison with program requirements

Verify setup sheet

Check job setup documentation to confirm correct tool numbers and ensure program matches intended tooling configuration.

Verify tool geometry and cutting parameters match job requirements

Correct program or setup

Either modify TOOL CALL statement to reference correct tool number or install required tool at the position referenced in program.

Use program editor's find/replace function for multiple tool number corrections