Motor rotation control apparatus with motor rotational frequency

Details Motor rotation control apparatus with motor rotational frequency Motor rotation control apparatus with motor rotational frequency

1988-05-16

1990-09-25

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

360 7303, H04N 576

Patent

active

049597337

ABSTRACT:
An apparatus for controlling the rotation of a motor to rotate a recording medium where an information signal and synchronizing signal are recorded. In such motor rotation control, normally the synchronizing signal reproduced from the recording medium is phase-compared with a reference synchronizing signal, and the motor rotation is so controlled as to eliminate the phase error between the two compared signals. And upon occurrence of any great variation in the motor rotation due to information dropout or the like on the recording medium, such variation is detected, and a rotational frequency signal obtained from a rotational frequency detector is phase-compared with a reference frequency signal generated on the basis of the data relative to the motor rotational frequency stored sequentially in a memory. Then the control mode is switched for controlling the motor rotation in such a manner as to eliminate the phase error between the two compared signals, whereby the problems including runaway of the motor and so forth can be solved.

REFERENCES:
patent: 4047231 (1977-09-01), Garagnon
patent: 4223349 (1980-09-01), Dakin et al.
patent: 4481615 (1984-11-01), Hioki
patent: 4542423 (1985-09-01), Kotake et al.
patent: 4638375 (1987-01-01), Motoyama

Affiliated with

Also associated with

Rating

Motor rotation control apparatus with motor rotational frequency does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Motor rotation control apparatus with motor rotational frequency, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor rotation control apparatus with motor rotational frequency will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-332345