公开(公告)号：WO1984003583A1

公开(公告)日：1984-09-13

申请号：PCT/US1984000339

申请日：1984-03-05

Applicant: STORAGE TECHNOLOGY PARTNERS II

Inventor： STORAGE TECHNOLOGY PARTNERS II ,  DEAN, Robert, E.

IPC: G11B27/32

CPC classification number: G11B21/085 ,  G11B7/08505 ,  G11B27/32

Abstract: Sector marks are selectively placed in each coarse servo track (M-15) of rotating disk (10). These concentric coarse seek tracks (11-15) pre-written on the disk (10), are used by a servo system for the positioning of the read/write mechanism. Coarse track read means simultaneously sense at least two adjacent coarse seek tracks (54-55). Detection means (60) sense the relative position of these coarse seek tracks (54-55) within the sensing range of the coarse track read means, and this position information is used by the servo system to selectively control the radial position of the coarse track read means with respect to the rotating disk (10). The sector marks written in the coarse seek tracks (11-15) are likewise detected, and a signal is produced indicating when each sector begins and ends. An oscillator (69) is locked to this sector signal such that a fixed number of cycles of the oscillator signal corresponds to the passage of one sector of the disk under the coarse track read means. A counter (70) is then used to count the appropriate number of cycles. An index mark (30), representing a zero degree reference point, is also placed in the coarse seek track (54). When sensed, the index mark (30) resets the counter (70). The count contained in the counter thus always indicates the rotational position (sector location) of the disk (10).

Abstract translation: 扇形标记选择性地放置在旋转盘（10）的每个粗略伺服轨迹（M-15）中。 预先写在盘（10）上的这些同心粗搜索轨道（11-15）由伺服系统用于定位读/写机构。 粗轨道读取装置同时感测至少两个相邻的粗搜索轨迹（54-55）。 检测装置（60）感测这些粗略搜索轨迹（54-55）在粗略轨道读取装置的感测范围内的相对位置，并且该位置信息被伺服系统用于选择性地控制粗略轨道的径向位置 相对于旋转盘（10）的读取装置。 写入粗略搜索轨道（11-15）中的扇区标记同样被检测，并且产生指示每个扇区何时开始和结束的信号。 振荡器（69）被锁定到该扇区信号，使得振荡器信号的固定次数对应于在粗轨道读取装置下的盘的一个扇区的通过。 然后使用计数器（70）对适当数量的周期进行计数。 代表零度参考点的索引标记（30）也被放置在粗略搜索轨迹（54）中。 当感测到时，索引标记（30）复位计数器（70）。 因此，计数器中的计数器总是指示盘（10）的旋转位置（扇区位置）。

公开(公告)号：WO1984001863A1

公开(公告)日：1984-05-10

申请号：PCT/US1983001613

申请日：1983-10-13

Applicant: STORAGE TECHNOLOGY PARTNERS II

Inventor： STORAGE TECHNOLOGY PARTNERS II ,  WILKINSON, Richard, A., Jr. ,  HUNT, William, C.

IPC: H02K37/00

CPC classification number: G11B19/2009 ,  H02K15/165

Abstract: A brushless direct current motor with the rotating magnet cup (43) permanently attached to the spindle hub (11). After attachment, the combination spindle hub and magnet cup are affixed to a shaft (10) and the resulting subassembly is dynamically balanced. The motor using this balanced subassembly is assembled with no balancing required after assembly. The motor can also be disassembled for repair and reassembled without disturbing the dynamic balance. The motor is especially useful for disk drive applications.

Abstract translation: 一种无刷直流电动机，其具有永久地附接到主轴毂（11）上的旋转磁体杯（43）。 在安装之后，组合主轴毂和磁体杯固定到轴（10），并且所得到的子组件被动态平衡。 使用这种平衡子组件的电机组装后，在组装后不需要平衡。 电动机也可以拆卸进行维修，重新组装，不会影响动平衡。 电机对于磁盘驱动器应用特别有用。