Fagor alarm E807: Defective C and D signals of the SinCoder (motor feedback)
DDS drive display code (AXD/SPD/ACD/SCD seven-segment) · Fagor DDS drives
What it means
The C and D commutation/mark channels of the sinusoidal motor feedback are outside valid levels. These same channels carry the once-per-revolution mark used for spindle orientation, so quality here degrades M19-type positioning first. May appear alongside E605 when the feedback cable is failing; disable-able but should not be masked.
Likely causes
- aged rotary encoder with weak C/D amplitude
- feedback cable shield broken or ground loop corrupting C/D
- moisture/cutting-oil ingress in the motor connector
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
- Request a quote →
Motor-feedback encoder (1 Vpp sinewave + C/D tracks)
encoder · Primary suspect
- Request a quote →
Shielded encoder cable drive-to-motor
encoder · Primary suspect
Need the part urgently?
Send us alarm E807 with your machine details — typical RFQ turnaround is 24–48h.