Method of ramp stop detection for VCM velocity-controlled...

Details Method of ramp stop detection for VCM velocity-controlled... Method of ramp stop detection for VCM velocity-controlled...

2006-11-10

2009-12-22

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

07636220

ABSTRACT:
A method and apparatus for controlling the parking of a transducer head in a disk drive. A drive current is provided to a motor which controls movement of the head in a direction to move the head to a parking position. The arrival of the head at the parking position is detected. Upon this detection, a drive stop sequence is initiated to stop providing the drive current a short time after the head reaches the parking position. In one embodiment, it is determined whether the head has reached the parking position by monitoring the back emf (bemf) of the motor controlling the head, typically a voice coil motor (VCM). The detection of a sharp decline in the bemf indicates the head has stopped.

REFERENCES:
patent: 5455723 (1995-10-01), Boutaghou et al.
patent: 6040671 (2000-03-01), Brito et al.
patent: 6064539 (2000-05-01), Null et al.
patent: 6363214 (2002-03-01), Merello et al.
patent: 6643088 (2003-11-01), Kawachi
patent: 6754027 (2004-06-01), Hirano et al.
patent: 6765746 (2004-07-01), Kusumoto
patent: 7295395 (2007-11-01), Koh et al.

Affiliated with

Also associated with

Rating

Method of ramp stop detection for VCM velocity-controlled... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of ramp stop detection for VCM velocity-controlled..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of ramp stop detection for VCM velocity-controlled... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4072090