Fanuc 414 Servo Alarm Z Axis Detect Error [extra Quality] Online

| Cause Category | Specific Issue | Frequency | | :--- | :--- | :--- | | | Z-axis brake not releasing, ballscrew binding, way lubrication failure, motor coupling loose | High | | Electrical / Cabling | Broken or intermittent encoder cable, faulty pulse coder, poor connector seating | High | | Servo Amplifier | Failed servo drive module (SPM / SVM), blown fuse, bad power transistor | Medium | | Parameter / Configuration | Incorrect motor parameter, wrong feedback polarity, improper grid shift | Low | | Power / Motor | Z-axis servo motor failure (magnet loss, winding short), low input voltage | Medium |

Contamination from coolant or oil can seep into the Z-axis motor, causing a short circuit or "ground fault." fanuc 414 servo alarm z axis detect error

Test the insulation resistance of the Z-axis motor to ensure it isn't shorting to the ground. Conclusion | Cause Category | Specific Issue | Frequency

A pulse coder (encoder) failure on the motor itself will lead to improper feedback. 3. Troubleshooting Steps Troubleshooting Steps