Does the alarm occur at a specific height or during high-speed movements?
: General power supply or axis control card failure. 2. Check the Diagnostic Screen Diagnose a Fanuc High Current Alarm in 10-Steps
. 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
Check the Z-axis flexible carrier track for pooling coolant or heavy chip buildup. fanuc 414 servo alarm z axis detect error repack
For the remainder of this article, references to "414 alarm" apply equally to the 434 Z-axis fault.
The alarm is axis-specific: "414" indicates an X-axis detection error, "424" corresponds to the Y axis, and "434" indicates the Z axis. For Z-axis applications, you will most likely see "434 SERVO ALARM: Z AXIS DETECT ERROR." However, many users refer to the entire 4n4 family of alarms as "414" regardless of the specific axis.
Observe if the 414 alarm changes to a different code (such as a 401 VRDY alarm or a missing phase alarm). Does the alarm occur at a specific height
If you see (high current alarm), the amplifier's intelligent power module (IPM) might be damaged, potentially causing the 414 detection failure.
Verified the Z-axis is not physically jammed or at a hard limit. Questions:
To pinpoint the exact failure, check the on your CNC screen: Diagnostic No. 200: Look for a "1" in these specific bits: Bit #4 (HCA): Abnormal current. Bit #5 (OVC): Overcurrent. Bit #6 (LV): Low voltage. Check the Diagnostic Screen Diagnose a Fanuc High
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 triggered by several factors, including: