Code 702509: Amplification motor, main spindle: Learn sensors for coupling
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Amplification motor, main spindle: Learn sensors for coupling 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
Learned states of engagement monitoring of the amplification motor have been deleted. Amplification motor, main spindle, engaged. Amplification motor, main spindle, disengaged. The error has the following effect: Feed Stop No axis movements possible. "Spindle Stop" Tool spindle is stopped. Speed no longer possible. 1. Learn states 'Amplification motor, main spindle, engaged" and "disengaged". 2. Clear error message with the [FEED START] key. Error messages Tool spindle Amplification motor, main spindle: Learn sensors for coupling The menu can be found under: [MENU SELECT] Chiron diagnosis total >> Amplific. Main spi.
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 702509 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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