Code 293-0006: Tolerance for rotary axes inactive
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Tolerance for rotary axes inactive 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] The tolerance for rotary axes with M128 was deactivated because you switched to a set of axis parameters without cutter-location filter. Therefore the normal path tolerance is being again used for all axes. The tolerance for rotary axes with M128 stays active until the cutter-location filter is used again. [Error correction] A correction is not essential. The warning can be suppressed by deactivating the tolerance for rotary axes before the axis parameter switchover.
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 293-0006 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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