Code 703163: Amplification motor, main spindle is not in position for engaging/disengaging
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Amplification motor, main spindle is not in position for engaging/disengaging 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
Amplification motor of the main spindle was positioned, but the signal "Spindle in position" is missing. Amplification motor is not in position for engagement. For engagement, the amplification motor must be at the 0° position. Position is monitored in the PLC (tolerance +/- 0.0035°). Read disable Feed STOP and Spindle STOP "Engage" function is not executed. 1. Check spindle enable and spindle signals. 2. Check drive controller. 3. 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 703163 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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