Method and apparatus for controlling speed in...

Details Method and apparatus for controlling speed in... Method and apparatus for controlling speed in...

2005-08-16

2005-08-16

Rivera, William A. (Department: 3654)

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Carrier speed or tension control

Reexamination Certificate

active

06929206

ABSTRACT:
A method and apparatus can control a tape speed in a magnetic tape recording/reproducing apparatus. The method can include operating the brake unit at a determined operating point to reduce the rotating speed of the supply or take-up reel, sensing the rotating speed of the capstan motor during the speed reduction by the brake unit at least two times to calculate when the rotating speed of the capstan motor substantially operates at a reduced target rotating speed, and stopping the braking operation of the brake unit based on the calculated time point. The method and apparatus can selectively achieve a rapid high-speed winding operation while reducing or preventing damage to the tape, and to achieve an accurate control substantially irrespective of surrounding conditions.

REFERENCES:
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patent: 6305629 (2001-10-01), Chliwnyj et al.
patent: 6315229 (2001-11-01), Miyahara
patent: 6450433 (2002-09-01), Fujii

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