Detect Error Repack — Fanuc 414 Servo Alarm Z Axis

Check Bit #6 (OFS) , which indicates an A/D converter or current offset error in the amplifier. Drafted Troubleshooting Post

Verify the automated lube pump is cycling and oil pressure reaches the Z-axis splitters.

This is why the Z-axis motor on virtually every vertical machining center (VMC) has an .

Demystifying the Fanuc 414 Servo Alarm: Z-Axis Detection Error and the "Repack" Solution fanuc 414 servo alarm z axis detect error repack

Often shown as sub-alarms 8, 9, or A on the amplifier's LED display. This can be caused by a short to ground in the motor or power cables.

Execute these steps in order. Document your findings at each stage to avoid retracing your steps.

Check the Z-axis flexible carrier track for pooling coolant or heavy chip buildup. Check Bit #6 (OFS) , which indicates an

: Check diagnostic parameters DGN 720 through 727 .

If the drive immediately drops back into an internal short-circuit alarm (LED 8, 9, or A) even with the motor cable completely disconnected, the internal power modules of the servo amplifier are blown and the unit must be replaced. Step 3: Isolate the Feedback Loop

. This alarm often stems from a short to ground or a hardware failure in the drive, motor, or cabling. TIE Industrial Fanucworld Initial Diagnostics Identify the Drive Alarm Demystifying the Fanuc 414 Servo Alarm: Z-Axis Detection

It is a last-ditch effort before replacing a $3,000 motor or a $1,500 encoder cable.

The Fanuc 414 servo alarm can be caused by a variety of factors, including: