Fine positioning apparatus for floppy disk drive
US4630145A · kind A · utility
26Cited by
11References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Jun 20, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D3/1436
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A positioning system for a magnetic disk storage system. A first and second lead screw connected to their respective stepper motors are mechanically connected by a lever arm that adds these motions. The first stepper motor is controlled by an open loop control circuit and the second stepper motor is controlled by a closed loop circuit that reads servo information off the magnetic disk. The head is constantly repositioned to follow track eccentricities and can accurately read very closely spaced tracks on non-rigid disks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.