Code 230-02BC: No oriented spindle stop of homed spindle
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical No oriented spindle stop of homed spindle 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] Oriented spindle stop should be performed with a spindle that has not yet been homed. [Error correction] - Check the NC program - Home the spindle - The parameter Axis->ParamSets->(Spindle)->CfgReferencing->refType must be set to "without Switch and on the fly" so that the spindle automatically homes.
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 230-02BC 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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