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公开(公告)号：CA2365103A1
公开(公告)日：1996-06-03
申请号：CA2365103
申请日：1995-11-24
Applicant: IBM
Abstract: During a write revolution of a storage medium, a transition is written on the storage medium while servoing on another transition previously recorded on the storage medium. During that write revolution, a position error signal corresponding to the position error of the transducer relative to the previously recorded transition is determined. That position error signal is then stored, during the write revolution, to be used in computing a reference track value associated with the transition being written to correct for the position error. Additionally, a product servo-pattern is written, which includes an embodying of the position error therein.
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公开(公告)号：DE3367293D1
公开(公告)日：1986-12-04
申请号：DE3367293
申请日：1983-05-19
Applicant: IBM
Abstract: A pen (10) has a conductive casing (12) with an ink writing tip (21). The tip (21) is detachably mounted on the movable end of a piezoelectric tube (26), which has an opposite end (27) fixed to a mounting in the casing (12), so that the tube is mounted in cantilever fashion. The tube (26) has inner and outer tubular electrodes between which an electric signal is generated according to the pressure on the tip during pen use. A second piezoelectric tube (24), also mounted in cantilever fashion so as to have a movable end (25) and a fixed end (23), is located behind the tip and has a different arrangement of five electrodes for providing x, y signals according to the transverse accelerations of the pen during use. The pressure and accelerometer signals are electrically processed by electronic circuitry (22) before leaving the pen on cable (8).
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