103results about "Carrier mechanical tension control" patented technology

Servo control methods and apparatus for a tape drive. A read/write head reads and writes data on magnetic tape with at least one servo track providing transverse position information. At least two servo readers arranged for reading a servo track associated with the read/write head operate concurrently to generate servo read signals. A position estimator processes each servo read signal to generate a series of position values corresponding to respective time instants indicative of their transverse positions. A servo controller calculates a skew value indicative of tape skew relative to the read/write head and a tension variation value indicative of variation of tape tension. The servo controller is adapted to account for cross-coupling between tape skew and tension variation.

A recording/reproducing method and a recording/reproducing device for magnetic tapes are less involved displacements between recording track and reproducing head even upon changes in the widthwise size of the magnetic tape, and capable of recording and reproducing data without causing errors, thus being ready for recording density enhancement of magnetic tapes. In both data recording and data reproduction, the tension of the magnetic tape is controlled so that absolute values of displacements between a pair of servo heads and a plurality of servo tracks corresponding to these servo heads are minimized.

A tape path control system and related method for controlling the position of a tape medium in the tape drive. The tape path includes a first tape guide roller, a second tape guide roller spaced from the first roller, and a transducing head situated between the first and second rollers. The first and second rollers may be large and closely spaced, with the second tape guide roller being spaced from the first roller at a roller diameter/center-to-center spacing ratio of between approximately 1:1-1:2 while still accommodating the transducing head therebetween. The transducing head may be positioned to lie on an opposite side of the tape medium from the first and second guide rollers, or on the same side of the tape. A precision alignment system is associated with the second roller. When operable, the precision alignment system allows the second roller to be adjustably aligned relative to the first roller in order to control lateral tape movement when a tape medium streams across the rollers in operative engagement with the transducing head. The precision alignment system may include an axial adjustment control adapted to adjust a position of the second roller along an axis thereof. The precision alignment system may further include a tilt angle adjustment control adapted to adjust a tilt angle of the second roller.

A recording/reproducing method and a recording/reproducing apparatus for magnetic tapes are provided as a recording/reproducing technique suitable for recording density enhancement of magnetic tapes. The method and apparatus are capable of correctly recording and reproducing data without causing errors even with occurrence of size changes in the widthwise direction of a magnetic tape. In the recording/reproducing method for magnetic tapes in which data tracks and servo tracks are provided, a tape width is detected and a value of the tape width is stored during data recording, and data reproduction is performed while tape tension is controlled so that the tape width during data reproduction is maintained equal to the tape width during data recording.

A tape drive comprising two motors, two tape spool supports on which spools of tape may be mounted, each spool being drivable by a respective one of the motors, and a controller. The controller controls the energization of the motors such that the tape may be transported in at least one direction between spools mounted on the spool supports. The controller is configured to store a plurality of motor control data items, each data item being associated with a respective tension value. The controller is operative to monitor tension in a tape being transported between spools mounted on the spool supports; read a motor control data item based upon the monitored tension; generate a motor control signal based upon the read motor control data item; and apply the motor control signal to at least one of the motors.

A tape media carrier has a tape medium for storing data, a rotatable element, such as a tape reel, bearing the tape medium, and a transducer within the tape media carrier. The transducer includes a sensor element and a detector for detecting at least one attribute of the sensor element that is responsive to ambient conditions within the tape carrier. The detector may be a strain gauge, in which case the measured attribute is strain. In another aspect, the sensor element may include marks disposed in at least one dimension. An optical detector in the media carrier may measure distance between the marks to represent the measured attribute of the sensor.

A tape drive of the present invention records data on a tape having a plurality of servo bands, where a servo signal is recorded in advance along a longitudinal direction, and a data band containing a plurality of data tracks formed between each of the servo bands while tracking the tape, based on a servo signal: the tape drive comprises a tape running system for running the tape between two reels that can wind it; and a data recording head comprising a pair of servo read elements provided corresponding to the servo band, and data write elements provided plurally side by side between the pair of the servo read elements, wherein when recording the data, the tape drive writes a condition in recording, which is obtained by reading the servo signal with the servo read elements, in at least one of the data tracks with the data write elements.

A system and method of controlling tape tension during operation of a tape drive by making use of pre-existing timing based servo patterns formatted on the media. Changes in servo pattern timing are read at regular intervals and used to calculate changes in tension, with the torque of the tape reel motors being adjusted accordingly.

A magnetic tape drive includes a magnetic head configured to read or write data on a magnetic tape, a transport unit configured to drive the magnetic tape past the magnetic head, a speed detector configured to obtain speed information related to a transport speed of the magnetic tape, a vibrator configured to vibrate the magnetic head, and a controller configured to carry out control over the vibrator based upon the speed information obtained by the speed detector. The controller determines whether the transport speed of the magnetic tape is not lower than a predetermined value, based upon the speed information, starts operation of the vibrator in response to a determination that the transport speed is lower than the predetermined value, and stops the operation of the vibrator in response to a determination that the transport speed is not lower than the predetermined value.

It is an object of the present disclosure to improve preservation stability of a magnetic recording medium including a magnetic powder having a small average particle volume.

The present disclosure provides a tape-shaped magnetic recording medium, including: a base; and a magnetic layer that is provided on the base and contains a magnetic powder, in which an average particle volume V of the magnetic powder is 2,000 nm³ or less, an average thickness of the magnetic recording medium is 5.3 μm or less, a thermal stability K_uV/k_BT of the magnetic recording medium is 60 or more, and a ratio Hrp/Hc1 of a residual coercive force Hrp of the magnetic recording medium measured using a pulsed magnetic field to a coercive force Hc1 of the magnetic recording medium in a perpendicular direction is 2.10 or less.

A tape drive comprising two motors at least a first of which is an open loop position-controlled motor arranged to provide a controllable torque, two tape spool supports on which spools of tape may be mounted, each spool being drivable by a respective motor, and a controller for controlling the energization of the motors such that the tape may be transported in at least one direction between spools mounted on the spool supports. The controller is arranged to provide a control signal to the first motor to set the tape tension.

Tape drive systems and methods for operating tape drive systems are provided. The system includes a head assembly having a head element for reading or writing data to a magnetic tape medium, and a pressure sensor coupled to the head element, the pressure sensor configured to generate a pressure signal representative of a pressure applied by the head element onto the pressure sensor. In some embodiments, an accelerometer is provided for sensing an acceleration of the head assembly and for generating a acceleration signal representative of an acceleration experienced by the head assembly. The method includes passing a tape medium between a take-up reel and a supply reel such that a tension in the tape medium causes the tape medium to apply a pressure onto a head element, and using a pressure sensor to detect a pressure applied by the head element onto the pressure sensor.

Provided are a method, system, and program for adjusting tension in a tape media to counter tape dimensional stability (TDS) errors in a tape media. A determination is made of whether to adjust tension of the tape media based on a detected error rate of reading at least one of the tracks. The tension of the tape media is adjusted in response to determining to adjust the tension.

A tape transport control system with enhanced regulation of tape tension and velocity over the entire length of the tape. For example, a closed-loop control system for controlling a tape transport includes circuitry adapted to output a signal representing a tape velocity at a tape head, circuitry adapted to output a signal representing a tape velocity at the first tape reel and a signal representing a tape velocity at the second tape reel, circuitry adapted to output a signal representing a tape tension, and circuitry adapted to, based on the received signals, generate control signals to control the tape velocity at least at one of the tape head, the first tape reel, the second tape reel, and the tension of the tape, using controller gains that depend on a longitudinal position of the tape, and to implement a system transfer function that is approximately independent of the longitudinal position.