Incremental stepping assembly for a rotary actuator

Details Incremental stepping assembly for a rotary actuator Incremental stepping assembly for a rotary actuator

1988-05-27

1990-01-02

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360105, G11B 555

Patent

active

048917222

ABSTRACT:
A rotary actuator for testing of magnetic disks having a rotary arm pivotally attached to an actuator housing at a first end and having at least one transducer at an opposite end. The rotary arm is mounted to the hub of a motion transfer wheel segment having an arcuate outer edge. A bearingless motor-powered drive roller is in frictional contact with the arcuate outer edge to impart rotational motion to the wheel segment. A pair of pressure wheels contact the drive roller to form a triangle of rollers and to positionally capture the drive roller against the arcuate outer edge. Rotation of the drive roller is translated to the rotary arm via the wheel segment, and causes the transducer to move along an arcuate path across a magnetic disk to be tested.

REFERENCES:
patent: 3984873 (1976-10-01), Pejcha
patent: 4745504 (1988-05-01), Foote

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