Code 700252: Tool still in the spindle
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Tool still in the 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
A tool change is pending, but a tool is clamped in the spindle which was inserted by hand previously. "Tool clamped" monitoring function detects that a tool is clamped in the spindle, although this is not allowed. 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. Remove tool manually from the spindle. 2. If despite this message there is no tool in the spindle, the “tool clamped monitoring system“ must be checked. 3. Once the malfunction has been remedied, press [RESET] key Message is cleared.
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 700252 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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