Fanuc 414 Servo Alarm Z Axis Detect Error |verified| Link

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

Check the pulse coder cable (feedback cable). Ensure it is shielded and not running too close to high-voltage lines, which can cause electrical noise interference. 📋 Step-by-Step Troubleshooting Flow fanuc 414 servo alarm z axis detect error

: Abnormal current (often points to the amplifier or a short circuit). OVC (Bit 5) : Overcurrent. LV (Bit 6) : Low voltage (power supply issue). FBA (Bit 1) : Disconnection alarm (feedback cable or pulse coder). Amplifier Display A indicates that the CNC has detected an

Does the alarm happen or only when the axis moves ? Ensure it is shielded and not running too

A FANUC 414 Z-axis alarm is rarely a software glitch and usually points to a physical hardware failure. Because the Z-axis often carries the weight of the spindle or tool head, addressing this alarm promptly is essential to maintain machine geometry and operator safety.

A on the Z-axis is a high-current detection error, often described as a "check engine light" for your digital servo system. It indicates that the CNC has detected an abnormal current flow in the Z-axis servo amplifier, motor, or cabling. Review of Causes & Symptoms

When faced with a Z-axis 414 alarm, a structured approach to troubleshooting is required to minimize downtime.