Fanuc Series 15i 150i
Fanuc Alarm SP0975 (Analog Spindle Control Error)
Fanuc Alarm SP975 ANALOG SPINDLE CONTROL ERROR
An abnormality was detected in the position coder for an analog spindle.
Cause and Action
Check that the position coder is connected correctly, and also check whether the position coder is out of order.
If the above checks do not reveal any abnormality, the position coder or the printed circuit board in the CNC may be defective.