If the amplifier or motor was replaced, the CNC may need to re-initialize the servo parameters.
Modern Fanuc systems (Series 0i, 16i, 18i, 30i, 31i) utilize a separation type detector cable (the round, screw-on connector on the encoder). The Error: 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. fanuc 414 servo alarm z axis detect error repack
The cable running from the servo amplifier to the pulse coder on the Z motor flexes constantly. Over years, wires break internally. Even a single broken shield wire can cause the "detect error." If the amplifier or motor was replaced, the