Code 701008: Brake, 4th axis not actuated
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Brake, 4th axis not actuated 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
Function "Release 4th axis brake" was actuated, but within 0.5 seconds, no response came indicating that the brake had been actuated. PLC input signal "4th axis brake actuated" is not registered. Read disable Feed Stop "Release 4th axis brake" actuation is cancelled again so that the motor does not constantly work against the clamping. Error messages Axes (>Z) Brake, 4th axis not actuated 1. Check the PLC output signal "Release 4th axis brake" and the actuation of the 4th axis brake. 2. Check the PLC input signal "4th axis brake actuated". 3. Switch off the control with [Control OFF]. 4. Switch on the control with [Control ON]. 5. Press [RESET]. Message is cleared. The error message "Drive not ready" can also appear as a consequential error.
Source: CHIRON Error Message Overview, all series (Siemens control, V2.0.6, 2012)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Chiron Siemens-Control CNC Alarms
Chiron controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 701008 on the Siemens-Control CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Chiron's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 545 Chiron Siemens-Control CNC codes.
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