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Home/ Questions/Q 343
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Anonymous
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Anonymous
Asked: January 11, 20252025-01-11T08:17:13+00:00 2025-01-11T08:17:13+00:00In: Fanuc SPM Alarm

SP9021 Position Sensor Polarity Error Drive alarm 21

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Have any changes been made to the wiring or connections of the position sensor recently?

Amplifier indication 21

9021sp9021
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  1. askcnc
    askcnc Teacher
    2025-01-11T08:18:07+00:00Added an answer on January 11, 2025 at 8:18 am
    This answer was edited.

    The polarity parameter setting of the position sensor is wrong. Check and correct the parameters. (Parameter No. 4000#0, 4001#4) If external encoder check timing belt near spindle

    The polarity parameter setting of the position sensor is wrong.

    Check and correct the parameters. (Parameter No. 4000#0, 4001#4)

    If external encoder check timing belt near spindle

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