To repack a faulty component:
To find out what caused the alarm, do not rely solely on the screen message. You must check the digital diagnostic parameters on your Fanuc control: fanuc 414 servo alarm z axis detect error repack
The "detect error" specifically points to a mismatch in the between the commanded position and the actual position feedback. The CNC sees this as a loss of control and immediately disables the servo drive to prevent a crash. To repack a faulty component: To find out
Overcurrent alarm (mechanical binding or motor overload). fanuc 414 servo alarm z axis detect error repack
But sometimes “repack” is mistakenly used for:
Fanuc servo motors typically use absolute encoders. These encoders "remember" the position of the machine even when powered off. This memory is maintained by batteries (usually located in the servo amplifier cabinet or separate battery packs).