SERVO_AMPLIFIER_SYNCHRONOUS_DEVIATION

Servo Amplifier Synchronous Deviation

Fanuc · αi series AC Servo Motor

What does SERVO_AMPLIFIER_SYNCHRONOUS_DEVIATION mean?

An alarm indicating a synchronous deviation for the servo amplifier module. This typically points to a problem with motor synchronization or control loop stability, leading to inaccurate motion.

Common Causes

  • Servo control loop instability or synchronization error within the servo amplifier

Repair Steps

  1. 1

    Turn the power off, then back on

  2. 2

    If this alarm recurs, replace the servo amplifier module

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Verified technical data. Last updated: March 2026
Source: Fanuc αi series AC Servo Motor
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Fanuc Error SERVO_AMPLIFIER_SYNCHRONOUS_DEVIATION: Servo Amplifier Synchronous Deviation — Troubleshooting Guide | ErrorLib