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    Fanuc 414 Servo Alarm Z Axis Detect Error [upd]

    Indicates an A/D converter (current detection) error. Common Causes & Solutions

    FANUC Troubleshooting Manual – FANUC CNC FAQ - MRO Electric

    : If the swap test indicated a cable fault, replace the feedback cable with a high-flex, oil-resistant shielded cable. Avoid patching or soldering encoder lines, as resistance changes disrupt data transmission.

    High-voltage lines running parallel to feedback cables can induce electromagnetic interference (EMI). If shielding is degraded or the machine lacks proper grounding, this electrical noise corrupts the pulse coder signal. Step-by-Step Diagnostic Workflow fanuc 414 servo alarm z axis detect error

    These diagnostic screens will display a binary code revealing the specific type of detection error:

    Help you interpret the specific from your diagnostics screen. Provide instructions on how to adjust the Z-axis brake . Give you tips for replacing the encoder cable . Let me know what you'd like to try next.

    To help narrow down the exact cause on your machine, could you tell me in Diagnostic 200 or 204 ? If you can also provide the FANUC control series (e.g., 0i-MC, 16i, 21i), I can give you more specific parameter numbers. Share public link Indicates an A/D converter (current detection) error

    Any reading below 10 Megohms indicates a breakdown in motor insulation, requiring motor repair or replacement. How to Prevent Future 414 Alarms

    The servo amplifier unit dedicated to the Z-axis is malfunctioning.

    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 . High-voltage lines running parallel to feedback cables can

    Disconnect the motor leads (U, V, W) from the amplifier. If the alarm persists when you power up, the amplifier is definitely faulty .

    Clean the air filters on the electrical cabinet doors regularly. Overheating servo amplifiers are significantly more prone to signal processing errors and premature component failure.