Fluctuations in plant voltage or unstable power supply output from the Power Supply Module (PSM) can also trigger a 414 error. Recommended Diagnostic Steps
The Z-axis servo amplifier (often an Alpha or Alpha i series module) will show a specific alarm code on its 7-segment display, typically 8, 9, or A . Alarm 8: High current on the first axis (L). Alarm 9: High current on the second axis (M). Alarm A: High current on the third axis (N). Primary Causes of Z-Axis Detect Errors fanuc 414 servo alarm z axis detect error
Fanuc 414 Servo Alarm indicates a detection related error in the digital servo system for the specified axis (in this case, the Z-axis). It is typically triggered when the CNC detects an abnormal condition on the servo amplifier, such as high current or a feedback issue. CNCpart.eu Common Causes Fluctuations in plant voltage or unstable power supply
for 30 seconds, then restart.
By cross-referencing the alarm code with the Fanuc maintenance manual, the technician can narrow down whether the issue is a broken wire (detection error) or a heavy load (overload error). Alarm 9: High current on the second axis (M)
Place a mechanical jack, a 4x4 wooden post, or an industrial spring lift under the spindle head. Then release the Z-axis brake manually (refer to your machine manual) to settle the head on the support. Do not rely on the brake alone.
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