Fanuc 414 Servo Alarm Z Axis Detect Error Upd File

Alarm 414 occurs │ ▼ Can you manually move Z-axis (handwheel)? ├─ NO → Brake likely stuck OR mechanical lock │ → Check brake relay / voltage │ ▼ Jog Z-axis while watching DGN 204 ├─ 204 = 0 → No feedback → Replace encoder cable or pulse coder ├─ 204 moves but jerky → Mechanical binding or motor magnet loss ├─ 204 matches command but error large → Increase parameter 1828 temporarily (test only) │ ▼ Swap servo drive with another axis ├─ Fault moves to X or Y → Replace drive ├─ Fault stays on Z → Motor or cable problem

A heavy Z-axis can drop or bind if gibs lack lubrication or if the ball screw jams.

The "detect error" is a symptom. The cause lies in one of four domains:

at:

Disclaimer: Troubleshooting CNC machines involves high-voltage electricity and heavy mechanical components. Always follow proper safety protocols (Lockout/Tagout) and refer to your specific machine's maintenance manual.

Replacing the motor encoder requires specialized equipment to set the proper phasing, and servo amplifiers require accurate configuration. Contact a certified FANUC service technician for these repairs to avoid further machine damage.

Usually accompanied by a 400-series error on the diagnostic screen, indicating a detection error or a failure to detect pulse coder signals. Primary Causes of the 414 Z-Axis Detect Error

Diagnose a Fanuc High Current Alarm in 10-Steps - TIE Information Center 19 Mar 2021 —

: The Intelligent Power Module (IPM) inside the drive may have failed, especially if the alarm appears immediately upon power-up. Mechanical Overload