Fanuc 366 Alarm - !!top!!

The Fanuc 366 Alarm, typically displayed as SV0366: n AXIS: PULSE MISS (INT), indicates a communication or detection error within the built-in pulse coder of the specified axis. This occurs when the internal feedback system fails to track the expected number of pulses, suggesting a physical or electrical interruption in the encoder signal.  Top Troubleshooting Steps 

The Fanuc 366 alarm is a specific error code on Fanuc CNC machines. Here's a general guide to help you troubleshoot and understand the issue: fanuc 366 alarm

Verify Power Supply: Use a multimeter to confirm the servo amplifier is receiving steady, correct voltage according to the machine's specifications. The Fanuc 366 Alarm , typically displayed as

• Normal count: 1 – 10 per scan.
• Abnormal count: Thousands or millions. This indicates a recursive loop.

Manual Rotation Test: Remove the servo motor and rotate the shaft manually while watching the position screen. If the numbers do not change, the pulse coder or cable is definitely not sending signals. 2. Inspect the Feedback Cable The cable is often the weakest link in the system. Normal count: 1 – 10 per scan