Code 701158: Tool in spindle was unclamped manually. Check, if the right tool is in the spindle. Continue with Feed Start.
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Tool in spindle was unclamped manually. Check, if the right tool is in the spindle. Continue with Feed Start. 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
It has been established that the tool was manually released in the spindle at some stage. The error has the following effect: Feed Stop No axis movements possible. Read disable Control reads no further program blocks into memory. Desired function is not executed. 1. The tool allocation of the spindle must be checked. 2. Press [FEED START] key. Message is cleared and the machining program can be continued. If a tool was manually inserted in the spindle at "T0" in the spindle, then make sure that this tool is removed before the next tool change. If this is not followed, the tool is released by force and is pushed out of the spindle after the [FEED START] key is pressed.
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 701158 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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