The FANUC 366 alarm (often displayed as "AL-366" or "SV-366") is a Servo Alarm related to the serial encoder communication between the CNC control and a servo amplifier/motor. It typically indicates a soft-phase (serial pulse) error or a communication data error on the servo bus.
is set correctly (setting it to 0 is sometimes used to clear certain compatibility issues). Inspect Connections fanuc 366 alarm
Check for Interference: Ensure feedback cables are routed away from high-voltage power lines to prevent electrical noise from corrupting the pulse signals. FANUC 366 Alarm: Review and Analysis Overview The
While the motor is running (if possible), check for excessive heat or vibration in the motor housing, which could indicate failing bearings impacting the encoder. Test the Motor/Encoder: If battery voltage is low (below ~2
WARNING: This alarm involves servo motors and high voltage.