Repetitive error correction method for disk-drive spindle...

Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control

Reexamination Certificate

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C318S400160, C318S400340, C318S400350, C360S073030

Reexamination Certificate

active

07990089

ABSTRACT:
Methods, systems and computer program products for compensating repeatable timing variations associated with a spindle motor are described. Specifically, a repetitive error correction factor may be determined using a computational model which predicts timing variations. The correction factor can then be used to cancel the effect of the actual timing variations upon the spindle motor.

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