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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
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 fanuc 366 alarm
Some "pulse mismatch" errors can be cleared by navigating to the system menu and performing a pulse coder reset . If the machine uses a linear scale or
If your CNC control displays a 366 alarm, follow these steps to isolate and fix the issue: If your CNC control displays a 366 alarm,
To determine if the fault lies in the motor, cable, or drive:
The alarm is almost always related to hardware or environmental interference rather than programming errors. Primary triggers include:
Loose or damaged feedback cables (encoder cables) and connectors.