Fanuc 366 Alarm Official

: Oil, coolant, or dust may have entered the pulse coder or the cable connectors, disrupting the optical or magnetic signal.

Your CNC control sends a command to the servo motor to move. The motor spins, and a device called a Pulse Coder (or encoder) attached to the motor shaft measures exactly how far it turned. It sends this data back to the control via a feedback cable. fanuc 366 alarm