Fanuc 414 Servo Alarm Z Axis Detect Error May 2026

This is a great topic to dig into. The Fanuc 414 Servo Alarm (Z-axis detect error) is one of the more common yet frustrating alarms on Fanuc-controlled CNC machines (like Mori Seiki, Haas (older models), Doosan, Mazak with Fanuc, etc.).

on the amplifier’s LED display. This can be caused by a short to ground in the motor or power cables, frequently due to coolant ingress in the motor connectors. Mechanical Strain: Specific to the Z-axis (vertical), wear on the or an incorrectly set counterweight fanuc 414 servo alarm z axis detect error

This is a technical deep-dive into the FANUC 414 Servo Alarm: Z-Axis Detect Error (often displayed as SV0414 or 414 on the CNC control). This is a great topic to dig into

Part 3: Immediate Action – The 10-Step Safety Check

Before you run to buy a $2,000 servo amplifier, perform this systematic diagnosis. Turn off the main breaker first. This can be caused by a short to

Inspect Cables: Examine the Z-axis command and feedback cables for physical damage or loose connections at the amplifier and the motor.

. These bit patterns help identify the specific failure type (e.g., bit #4 for High Current Alarm or bit #5 for Overcurrent) Troubleshooting Steps Follow these steps to isolate the faulty component: Isolate the Motor/Cable