Code 280-0487: Infeed limited to length of cutting edge
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Infeed limited to length of cutting edge 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] If a cutting edge length is specified in the LCUTS column in TOOL.T, the TNC restricts the infeed to this value. [Error correction] Check the value of the cutting edge length (LCUTS in TOOL.T) and the programmed infeed. Enter the value 0 as the cutting length to switch off this monitoring.
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 280-0487 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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