Code 160-0320: Impermissible tool type for tool shape
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Impermissible tool type for tool shape 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] 3D tool shapes can be used for milling cutters and touch probes. Note: The parameterized description of the tool takes effect. Indexed tools can also be shown only in a parameterized manner. [Error correction] - Remove the entry from the TSHAPE column - Enter a correct parametric description of the tool
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 160-0320 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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