Stepper motor feedback in position servo loop

H - Electricity – 02 – P

Patent

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316/18

H02P 8/00 (2006.01) G05B 19/39 (2006.01) G05B 19/40 (2006.01)

Patent

CA 1065010

STEPPER MOTOR FEEDBACK IN POSITION SERVO LOOP ABSTRACT OF THE DISCLOSURE The actual drive signals to a stepper motor which rotates a mechanical device provide low order bits used in place of the low order bits of a digital word derived from an analog position sensor, to provide an accurate feedback word for subtraction from a digital position command word so as to generate a position error signal to drive the stepper motor in a servo loop. -1-

250744

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