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Code 700129: Warning! Tool in spindle

Issue Description & Safety Warning

The Chiron Siemens-Control CNC has triggered a critical Warning! Tool in 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

The function "Swivel workpiece changer" was programmed, but there is a long tool in the spindle. While the workpiece changer is swivelling, there is a danger of collision with long tools. The tool length (L1) of the spindle tool is monitored. 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. Switch to "Manual mode". 2. Press [RESET] key. 3. The corresponding tool must be changed out of the spindle and either a shorter tool has to be changed in or T0. The machine has been moved in the area of the centre divider, or this is desired, but the conditions for a change of work area are not fulfilled. Messages "Movement command (+) or (-) direction blocked" appear simultaneously. Cause 1: Cause 2: Feed Stop 1. Switch to "Manual mode". 2. Move the machine into one of the work areas and meet the conditions. 3. Check the machining program. If the X-axis reaches the area in which both cams overlap (centre guard area), Feed Stop is output. In addition, the 2nd software limit switch is monitored in Automatic. A detailed description of the work area range can be found in the work area ranges chapter: Conditions for change of work area Operating message when condition not fulfilled Z-axis at position 0 Z-axis not in position Y-axis at position 0 Y-axis not in position All tools up (T0 in the spindle), or the PLC-MD 14510[2] Bit 3 is set to 1. CAUTION! Tool in spindle

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 700129 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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