Code 606-039B: %2 Residual material will remain
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical %2 Residual material will remain 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
%1 [Cause of error] The target contour cannot be completely machined; residual material will remain. This can be due to various reasons, such as the tool cannot reach the respective area due to geometrical reasons, the prescribed inclination angle range makes it impossible to reach the residual material, etc. [Error correction] Residual material must be considered for the subsequent machining operations.
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 606-039B 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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