When Alarm 414 is active, you must navigate to the screen on your FANUC control panel to read the binary status bits. The most critical diagnostic numbers for this alarm are No. 200 and No. 204 .
If your machine uses a separate linear glass scale for high-precision Z-axis feedback (instead of or in addition to the motor encoder), a dirty scale reader head or a misaligned scale will trigger this alarm. Step-by-Step Troubleshooting Guide
Would you like a specific diagnostic flowchart for your machine’s control model (e.g., Fanuc 0i, 18i, 31i)?
Indicates an internal short, module failure, or high current loop error. fanuc 414 servo alarm z axis detect error
at:
The on the Z-axis is a high-current detection error within the digital servo system. It signifies that the CNC control has detected abnormal current flow or a hardware fault related to the Z-axis servo amplifier, motor, or cabling. Because the Z-axis often carries the weight of a spindle or heavy tooling, this error can also be triggered by mechanical binding or counterweight failure. Understanding the 414 Alarm Signal
Troubleshooting FANUC Alarm 414: Z-Axis Detect Error The FANUC 414 Alarm indicates a digital servo system error specifically occurring on the Z-axis. This alarm stops machine motion instantly to protect components from mechanical and electrical damage. Understanding FANUC Alarm 414 When Alarm 414 is active, you must navigate
The optical or magnetic encoder mounted on the rear of the Z-axis servo motor has failed or suffered physical shock.
If the cable tests positive for shorts or intermittent continuity, replace it with a high-flex, oil-resistant robotic cable. Ensure the shield is properly grounded at the amplifier chassis.
Swap the Z-axis feedback cable with the X-axis feedback cable at the amplifier side. Indicates an internal short, module failure, or high
When the 414 alarm appears, navigate to the screen on your FANUC control panel and locate Parameter 200 (or 0200). This parameter contains an 8-bit binary code (read from right to left, bits 0 to 7) that pinpoints the exact failure:
Cables moving continuously inside flexible track chains often develop internal fractures. Power down the CNC machine completely.