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US 4,788,606 AGranted
Tape feed control device
AssigneeNakamichi Corporation
InventorGohji Uchikoshi
Life of this patent
Estimating the term…
Abstract
A tape feed control device is configured to detect resolutions of respective reels so as to supply respective reel motors with tension currents i.sub.t1 and i.sub.t2 for setting a tape tension to establish a predetermined tape tension of a tape extending between the reels, and so as to supply the reel motors with acceleration and deceleration currents i.sub.s1 and i.sub.s2 based on an acceleration/deceleration current ratio .alpha. to transport the tape. In this fashion, a desired tape speed is obtained, maintaining a constant tape tension.
Claims3
A tape feed control device, comprising:
- two reel motors, a rotation detecting means for detecting rotation information signals of said reels, and a tension signal output means for effecting an operation based on said rotat:on information signals to determine tension currents to be applied to said reel motors respectively to establish a.predetermined tension of a tape extending between said reels;
- a reference speed signal output means for producing a reference speed signal which determines the speed of transporting said tape;
- a difference information output means for comparing at least one of said rotation information of said reels with said reference speed signal and outputting a resulting difference information signal;
- an acceleration and deceleration signal output means responsive to said difference information signal to produce acceleration and deceleration signals which determine acceleration and deceleration currents for driving respective said reel motors;
- and
- reel motor driving means for producing motor drive currents based on said tension signals and said acceleration and deceleration signals to drive respective said reel motors.
3 more elements
Dependencies are inferred from the claim text.