Code 330-008D: MC traverse range exceeded at SS2 %2
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical MC traverse range exceeded at SS2 %2 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] When braking at a contour (SS2), a spindle or axis exceeded the maximum permissible path. The maximum permissible path for axes is the entry in the safety-related machine parameter distLimitStop2. A maximum of 2 revolutions are permissible for spindles during an SS2 reaction in SOM_2, and 5 revolutions are permissible in SOM_3, SOM_4. [Error correction] - Check the machine parameters for the braking process during an SS2 reaction. - Check the entry in distLimitStop2 - Inform your service agency.
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 330-008D 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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