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.
For certain over-travel or reference position issues related to encoders, you can hold the "P" and "CAN" keys during power-up. This forces the system to ignore some alarms until the first zero reference is established. Professional Repair and Replacement
If your CNC control displays a 366 alarm, follow these steps to isolate and fix the issue:
Loose or damaged feedback cables (encoder cables) and connectors.
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
The alarm is almost always related to hardware or environmental interference rather than programming errors. Primary triggers include: