Fanuc 414 Servo Alarm Z Axis Detect Error Repack Best [Limited — 2025]

A '1' in bit 5 (OVC) of Diagnostic 200 confirms an issue.

A on the Z-axis indicates a high-current detection error . This means the CNC has detected an abnormal amount of current flowing through the servo amplifier or motor for that specific axis. fanuc 414 servo alarm z axis detect error repack

Before you throw parts at the machine, you must understand the FANUC alarm hierarchy. A '1' in bit 5 (OVC) of Diagnostic 200 confirms an issue

Disconnect the Z-axis motor power leads (U, V, W) from the amplifier. Before you throw parts at the machine, you

Modern Fanuc systems (Series 0i, 16i, 18i, 30i, 31i) utilize a separation type detector cable (the round, screw-on connector on the encoder). During a re-pack, technicians might accidentally swap the encoder cables of the Z-axis and the Spindle (if the spindle motor is nearby). The Result: The control sends a request to the Z-axis, but gets feedback from the Spindle. The data mismatch triggers a 414.