Rainer-Rebhan
At its core, the 7115 alarm indicates that the CNC control has detected a conflict between the theoretical position calculated by the interpolation processor and the actual position reported by the servo motor's encoder.
Spindle amplifiers require clean DC power. If the 24VDC control voltage drops below 20V for even a millisecond, the serial ICs lose their ability to transmit data. fanuc 7115 alarm
A skilled technician can use a FANUC or Serial Analyzer tool to watch the raw serial data stream and pinpoint the exact bit-flip or timing issue. At its core, the 7115 alarm indicates that
The connection between the CNC and the spindle amplifier is typically a or a shielded twisted-pair serial cable, depending on the drive generation. A skilled technician can use a FANUC or
FANUC alarm codes vary slightly by series (0i, 15, 16, 18, 21, etc.). Alarm 7115 is most commonly associated with αi / βi series servo amplifiers on FANUC 15/16/18/21/0i-B/C controls. If your control differs, confirm using your specific FANUC alarm manual.