Servo track writing using adaptive rotational speed control

Details Servo track writing using adaptive rotational speed control Servo track writing using adaptive rotational speed control

1997-09-09

2000-06-20

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 69, G11B 1546

Patent

active

06078458&

ABSTRACT:
Apparatus and method for writing servo information in a head disc assembly (HDA) comprising a head, a disc and a spindle motor for rotating the disc. The servo information is written by the head to servo fields on the disc. A positioning system positions the head relative to the disc and a control circuit controls the positioning of the positioning system as well as the rotational speed of the spindle motor. An electro-mechanical transducer outputs a signal indicative of vibratory response of the HDA as the disc is rotated and a computer is provided which instructs the control circuit to rotate the spindle motor at each of a plurality of rotational speeds while characterizing the vibratory response of the HDA using the signal from the transducer for each of the rotational speeds. An optimal rotational speed is thereafter selected and used to write the servo information, the optimal rotational speed minimizing variation in the placement of the servo information.

REFERENCES:
patent: 5164863 (1992-11-01), Janz
patent: 5241430 (1993-08-01), Janz
patent: 5262907 (1993-11-01), Duffy et al.
patent: 5631999 (1997-05-01), Dinsmore
patent: 5892635 (1999-04-01), Morita

Affiliated with

Also associated with

Rating

Servo track writing using adaptive rotational speed control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Servo track writing using adaptive rotational speed control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Servo track writing using adaptive rotational speed control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1858230