Inspect the feedback cable between the servo motor and the amplifier for fraying, sharp bends, or loose plugs. Reseat the connectors to ensure a solid connection.

The is a critical system alert indicating a Pulse Miss in the built-in pulse coder of a servo motor. This error typically signifies that the CNC control has detected an inconsistency or "missed pulse" in the feedback signal, preventing the system from accurately tracking the axis position. Core Causes of the 366 Alarm

If the machine uses a linear scale or if the motor's pulse coder is exposed, check for grease or coolant buildup. Cleaning the scale or coder can often resolve "missed pulse" errors. 2. Diagnostic Swapping

External electromagnetic interference disrupting the high-precision pulse signal. Troubleshooting and Resolution Steps

If your CNC control displays a 366 alarm, follow these steps to isolate and fix the issue:

Dirt, oil, or coolant ingress into the pulse coder or scale.

Some "pulse mismatch" errors can be cleared by navigating to the system menu and performing a pulse coder reset .