Tape speed control apparatus using rotation speed ratio of first and second tape reels
US5604652A · kind A · utility
19Cited by
12References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 1995 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | May 24, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tape speed command signal is differentiated, and in a multiplier, the torque necessary for acceleration or deceleration of a take-up reel motor is calculated in accordance with the moment of inertia of a take-up reel and a winding radius of the tape on the take-up reel. The calculated result is added to a torque command produced by a feedback control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.