Reel servo control with resonance damping circuit

Details Reel servo control with resonance damping circuit Reel servo control with resonance damping circuit

1986-04-11

1988-04-26

Werner, David

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

242 7551, 318 6, B65H 7700, H02P 154

Patent

active

047399481

ABSTRACT:
In a tape transport apparatus, a first servo feedback loop is provided for correcting tape tension by adjusting the rotation of a tape reel in response to the sensed position of a tension arm that engages the moving tape. A second feedback loop senses the rate of change in the position of the tension arm and responsively damps the tension arm position changes by means of a lead circuit which causes a torque motor coupled to said pivotable arm to move in opposition to the tension arm position changes.

REFERENCES:
patent: 3718289 (1973-02-01), Alaimo
patent: 3787690 (1974-01-01), Neff
patent: 4097005 (1978-06-01), Sleger
patent: 4104685 (1978-08-01), Chang
Television Engineering Handbook, K. Blair Benson, 1986, Section 15, Video Tape Recording-Servo Systems, pp. 15.108-15.109, McGraw Hill.

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