Fanuc 414 Servo Alarm Z Axis Detect Error -

“414 Z-axis detect error” is (ballscrew/bearing). It’s almost always electrical: broken encoder cable, failed drive, or less often a bad motor encoder. Don’t pull the ballscrew – check the wires first.

The is a critical diagnostic signal indicating an "abnormal current" or high-current fault within the digital servo system. This alarm specifically identifies that the CNC has detected an issue with the power supply or servo amplifier module for the Z-axis, often preventing the machine from operating to avoid hardware damage. Core Meaning and Triggers fanuc 414 servo alarm z axis detect error

: Physical resistance in the Z-axis, such as a faulty ballscrew, improper counterweight setting, or gibs that are too tight . “414 Z-axis detect error” is (ballscrew/bearing)

This alarm typically presents as a sudden stop in the motor while operating or immediately upon powering on. The is a critical diagnostic signal indicating an

On older Fanuc 0-series, an arcing spindle drive contactor can generate an electromagnetic pulse that scrambles the serial servo data.

from Z-motor to servo amp: