Disconnect the motor power cables from the amplifier and use a megohmmeter to check for a short to ground in the motor or cable.
When the machine is off, the Z brake holds the head up. If the brake is dragging (partially engaged while the motor is trying to move), the motor stalls momentarily. This stall causes the encoder feedback to mis-match the commanded position, triggering the detect error. fanuc 414 servo alarm z axis detect error repack
If the 414 alarm vanishes, the fault lies downstream in the . Disconnect the motor power cables from the amplifier
In the realm of Computer Numerical Control (CNC) machining, Fanuc controls are the industry standard. When a Fanuc-controlled machine triggers a , it indicates a specific issue within the digital servo system: a "Detect Error." When this alarm is accompanied by the sub-message "Z-Axis," it localizes the problem to the vertical axis of the machine. This stall causes the encoder feedback to mis-match
