公开(公告)号：US5331490A

公开(公告)日：1994-07-19

申请号：US606887

申请日：1990-10-31

申请人： Alan J. Richards ,  William A. Godette ,  Helmuth O. Kroog ,  Kevin L. Miller

发明人： Alan J. Richards ,  William A. Godette ,  Helmuth O. Kroog ,  Kevin L. Miller

IPC分类号： G11B15/675 ,  G11B25/06 ,  G11B33/02 ,  G11B5/58

CPC分类号： G11B33/02 ,  G11B15/67521 ,  G11B25/063

摘要： The present invention provides a back-up tape drive having a precision molded chassis with a fine positioning system for a tape head. This system includes a follower nut threadingly mounted on a lead screw that is bi-directionally rotated by a stepper motor. A lever arm engages the follower nut in a manner such that torsional moments between the forces of the follower nut and lever arm are minimized. The other end of the lever arm engages a tape head mounting unit. The lever arm pivotally engages the chassis at a predetermined midpoint of the lever arm such that a mechanical advantage is derived. The positioning system is designed so the forces acting on the tape head mounting unit are aligned to minimize the torsional forces acting on the tape head mounting unit. The tape head mounting unit further includes reference features that reduce the need for azimuth and zenith adjustment.

摘要翻译： 本发明提供了一种具有精密模制底盘的备用磁带驱动器，其具有用于磁带头的精细定位系统。 该系统包括螺纹安装在由步进电机双向旋转的导螺杆上的从动螺母。 杠杆臂以使得从动螺母和杠杆臂的力之间的扭转力矩最小化的方式与从动螺母接合。 杠杆臂的另一端与磁带头安装单元接合。 杠杆臂在杠杆臂的预定中点处枢转地接合底盘，从而得到机械优点。 定位系统被设计成使作用在磁带头安装单元上的力被对准，以使作用在带头安装单元上的扭转力最小化。 磁带头安装单元还包括减少对方位角和天顶调整的需要的参考特征。