231-A880

Check current work offset

Press POS key, select 'Preset table' to view active G54-G59 offsets for the affected axis.

Compare the work offset value plus your programmed coordinates against the machine limit

Verify preset table entries

Navigate to Setup > Preset table and check if the offset values are realistic for your part setup.

Never enter arbitrary large values to 'fix' positioning issues

Recalculate work offset

Use manual probing or preset probe cycles (Cycle 1, 9, or 10) to establish correct work coordinate system.

Always verify your setup with G0 moves in single block mode after changing presets

Access machine parameters

Enter MOD function, password level, navigate to CfgAxParSafety section for the affected axis.

Only modify machine parameters if you have proper authorization and documentation

Compare absLimitPos with machine specs

Verify the absLimitPos value matches the machine manufacturer's travel specifications and physical limit switch positions.

Check the machine manual for original parameter settings before making changes

Test limit after parameter change

After any parameter modification, test approach to positive limit in JOG mode at slow feed rate to verify proper operation.

Always backup machine parameters before making changes

Review program coordinates

Open the NC program and check maximum coordinate values for the axis that triggered the alarm.

Use the TNC's program graphics simulation to visualize the complete tool path

Calculate total coordinate system

Add program coordinates + work offset + tool length compensation to determine actual machine position requirements.

Don't forget to account for tool radius compensation when checking X/Y limits

Modify program or setup

Either relocate the work coordinate system or modify the program coordinates to fit within machine travel limits.

Consider using different tool lengths or repositioning the part on the table

Check active tool data

Press TOOL key to access tool table and verify length compensation values for the active tool number.

Look for unusually large positive or negative length values that seem unrealistic

Verify H-code in program

Confirm the program calls the correct H-number that corresponds to the actual tool being used.

Mismatched H-codes can cause crashes or limit violations

Re-measure tool length

Use tool presetter or on-machine probing (Cycle 31) to establish correct tool length compensation values.

Always verify tool measurements with a test approach move before running production

Perform reference point return

Execute reference point approach for all axes using the REF key to re-establish machine coordinate system.

Ensure no obstacles are in the path before running reference point cycle

Check encoder status

Navigate to diagnostic screens to verify encoder feedback signals and absolute encoder battery status.

Look for encoder error messages or battery low warnings in the error log

Verify mechanical reference accuracy

Use dial indicator to confirm reference point repeatability and check for mechanical wear in reference switches or dogs.

Mechanical reference problems require immediate attention to prevent crashes