Browse Prior Art Database

Combination of Rotary and Linear Actuators

IP.com Disclosure Number: IPCOM000041985D
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Document File: 2 page(s) / 60K

Publishing Venue

IBM

Related People

Chapman, DW: AUTHOR

Abstract

The figure shows a disk file 10 in which data is recorded by mounting the center of rotation of the rotary actuator on the end of the arm of the linear actuator. As shown in the figure, two head arms 20 and 21 are mounted to the rotary actuator such that one head arm services band 1 and the other head arm services band 3. Movement of the center of the rotation of the rotary actuator by energizing the linear actuator provides for the servicing of bands 2 and 4 on the disk by the respective head arms. A second linear/rotary actuator combination 30 is employed to service bands 5 through 8 on the disk.

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Combination of Rotary and Linear Actuators

The figure shows a disk file 10 in which data is recorded by mounting the center of rotation of the rotary actuator on the end of the arm of the linear actuator. As shown in the figure, two head arms 20 and 21 are mounted to the rotary actuator such that one head arm services band 1 and the other head arm services band
3. Movement of the center of the rotation of the rotary actuator by energizing the linear actuator provides for the servicing of bands 2 and 4 on the disk by the respective head arms. A second linear/rotary actuator combination 30 is employed to service bands 5 through 8 on the disk. The arrangement is such that the movement of the linear actuator is on a line which parallels the direction of motion of the magnetic transducers when they are moved by the rotary actuator on a line extending through the axis of the disk. To prevent rotary vibration of the rotary actuators from occurring when they are moved by the linear actuator, the linear actuator may be attached to the rotary actuator at its center of rotation. Also, a current can be applied to the rotary actuators to hold them against their crash stop when the linear actuator is moving. The linear actuator may have more than two rest positions and may be controlled by a closed-loop servo system.

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