A indicates that the CNC has detected an abnormal current or a hardware fault within the digital servo system specifically for the Z axis . This is a critical error often caused by a short circuit, a faulty amplifier, or a motor failure. Immediate Diagnostics
Slightly pulling out and reseating the gray board on the amplifier's front can sometimes fix bad connections. fanuc 414 servo alarm z axis detect error
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When the Fanuc 414 servo alarm occurs, the machine may exhibit the following symptoms: Fanuc 414 Servo Alarm (Z Axis Detect Error)
When the 414 alarm appears on the CNC screen, it is typically accompanied by a single-character code on the servo amplifier's LED display—most commonly . Reseat connectors at: Preventing Future Occurrences How to
: If the motor brake does not release properly (24V DC not reaching the coil), the motor will pull excessive current trying to move, triggering the alarm. Shorted Motor or Cable
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