Reducing harmful runout in a rigid magnetic disk through use of

Details Reducing harmful runout in a rigid magnetic disk through use of Reducing harmful runout in a rigid magnetic disk through use of

1988-04-04

1989-10-17

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

369271, G11B 1702

Patent

active

048751189

ABSTRACT:
Runout in a rigid magnetic disk is reduced by sandwiching a sized shim between the disk and disk support to form a substantially smooth sinusoidal circumferential profile to the disk. A method of determining shim size is also described, employing test disks for determining optimal shim size for each class of rigid disk.

REFERENCES:
patent: 4561035 (1985-12-01), McDorman et al.
patent: 4755981 (1988-07-01), Ekhoff

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