Disconnect the Z-axis power cable from both the servo amplifier and the motor.
Internal transistor failure (IPM module) inside the FANUC drive generates false overcurrent alarms.
: Physical resistance in the Z-axis, such as a faulty ballscrew, improper counterweight setting, or gibs that are too tight . fanuc 414 servo alarm z axis detect error
Once you have identified and corrected the root cause, you can reset the alarm. Simply press the RESET key on the CNC operator panel. The machine will usually prompt you to perform a reference point return ("home") operation to re-establish absolute position.
Lubricate the ball screws and guide rails regularly to reduce friction. Disconnect the Z-axis power cable from both the
Disclaimer: Troubleshooting CNC equipment can be dangerous. Always ensure the machine is properly locked out before inspecting mechanical components. If you'd like, I can:
Use a Megohmmeter (Megger) to test the insulation resistance between each phase wire (U, V, W) and the ground wire. Once you have identified and corrected the root
The Z-axis faces unique mechanical and electrical stresses compared to horizontal axes. Because it moves vertically, it constantly fights gravity and is frequently exposed to heavy falling coolant and metal chips. 1. Contaminated or Broken Feedback Cables
, 9 (M-axis) , or A (N-axis) all indicate a high current fault , meaning the amplifier detected more electricity flowing than it could handle. Common Culprits & Troubleshooting
Check the pulse coder cable continuity. Clean any coolant or moisture out of the encoder connector plug using electrical contact cleaner. Faulty Servo Amplifier Module