Fanuc alarm SP1975: ANALOG SPINDLE CONTROL ERROR
spindle alarm (serial spindle, alpha i) · Fanuc 0i-D
What it means
An abnormality was detected in the position coder of an analog spindle system. Even where the spindle drive itself is analog, the CNC monitors the position coder used for orientation/threading; a fault in that feedback path triggers this CNC-side alarm.
Likely causes
- Position coder cable disconnected or damaged
- Coder head failure or contaminated disk
- Incorrect coder-related parameter selection
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A860-0360-B101
Position coder (spindle encoder) · Check if others ruled out
Need the part urgently?
Send us alarm SP1975 with your machine details — typical RFQ turnaround is 24–48h.