Code 280-0474: Axis angle not equal to tilt angle
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Axis angle not equal to tilt angle alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
[Cause of error] Probing function not permitted while working plane is inactive: the position of the tilted axes is not equal to 0°. Probing function not permitted while working plane is active: the position of the tilted axes does not match the active angular values. [Error correction] Working plane is inactive: move the tilting axes to the home position. Working plane is active: move the tilting axes to the correct position or adapt the angular values.
Source: HEIDENHAIN NC Error Messages — TNC7/640/620/320/128, CNC PILOT 640, MANUALplus 620 (10/2023)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Heidenhain TNC Series CNC Alarms
Heidenhain controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 280-0474 on the TNC Series CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Heidenhain's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4497 Heidenhain TNC Series CNC codes.
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