| Field | Detail | |-------|--------| | | 414 | | Message | SERVO ALARM: (Z-AXIS) DETECT ERROR | | Meaning | The software position detection system has detected an abnormal signal. Specifically, the Pulse Coder (encoder) signal is missing or corrupt on the Z-axis. | | CNC Suspends | Yes – Immediate feed hold and servo off. | | Applies To | Z-axis (usually the vertical axis – spindle head or knee). |
Disconnect the cable and inspect the pins for green corrosion, moisture, or cutting fluid.
Clean both male and female connectors thoroughly using an electrical contact cleaner. Dry completely with compressed air.
| Alarm Code | Message | Type | | :--- | :--- | :--- | | | SERVO ALARM: Z-AXIS DETECT ERROR | Axis-specific servo alarm | fanuc 414 servo alarm z axis detect error
To resolve a 414 alarm, technicians generally follow a process of elimination:
The is a critical warning indicating that the CNC has detected an abnormal condition in the digital servo system for the Z-axis . This typically points to a high current (overcurrent) condition or a hardware fault in the amplifier, motor, or cabling. Understanding the Alarm
When the alarm appears on your screen, it is typically accompanied by a breakdown of the axes: : Diagnostic bits indicate X-axis faults. Y-Axis : Diagnostic bits indicate Y-axis faults. | Field | Detail | |-------|--------| | |
Look at the 7-segment display on the Fanuc Alpha or Beta Series drive. Note any numbers or letters displayed.
Intermittent 414 alarms that happen during heavy movement.
: A short circuit to ground in the Z-axis motor windings or power cables (U, V, W leads) Faulty Servo Amplifier | | Applies To | Z-axis (usually the
The is a critical fault indicating a digital servo system error related to the detection circuit of a specific axis—in this case, the Z-axis . This alarm typically halts machine operation to prevent mechanical damage or positioning inaccuracies. 1. Understanding the Error
This is a great topic to dig into. The is one of the more common yet frustrating alarms on Fanuc-controlled CNC machines (like Mori Seiki, Haas (older models), Doosan, Mazak with Fanuc, etc.).
Below is a step-by-step procedure. This should be performed by qualified personnel.
If the cable tests positive for shorts or intermittent continuity, replace it with a high-flex, oil-resistant robotic cable. Ensure the shield is properly grounded at the amplifier chassis.
: Use a megohmmeter (megger) to check insulation between motor phases and ground. A reading below 500 MΩ often indicates a short Check for Overheating