Fanuc 414 Servo Alarm Z Axis Detect Error -

This alarm is not just a minor glitch; it indicates a serious discrepancy between the commanded position and the actual position feedback from the motor or load. When the Z-axis—responsible for vertical tool movement—is involved, the stakes are even higher. A Z-axis failure can lead to a dropped spindle, broken tools, scrapped parts, or even machine damage.

: High current on the L-axis (the first axis on the drive). 9 : High current on the M-axis (the second axis). A : High current on the N-axis (the third axis). fanuc 414 servo alarm z axis detect error

Incorrect values in servo parameters (e.g., – CMR, Pr. 2024 – feed-forward gain, or Pr. 2084 – scale factor) can cause the CNC to misinterpret feedback. This alarm is not just a minor glitch;

If you can access the motor, use the (usually a 2-pin connector). Apply 90-110 VDC to release the brake. Then try to rotate the motor fan cover by hand. If you cannot turn it, the mechanical brake is stuck or the ballscrew is locked. : High current on the L-axis (the first axis on the drive)