If the absolute encoder setup fails, the CNC will often trigger a "" (Need Zero Return) alarm after a power cycle. This indicates that while the absolute encoder is enabled, a valid zero reference point is not stored in Parameters 1860 and 1861.
How to confirm exact definition for your controller: fanuc parameter 1860 full
[Absolute PulseCoder] ──(Grid/Reference Link)──> [CNC Calculates Offset] ──> Automatically Writes to Parameter 1860 If the absolute encoder setup fails, the CNC
If the Position Gain (P1825) is too low, the axis won't have enough "stiffness" to stay in place. If the absolute encoder setup fails