TH5773A - Servo system for dual track - Google Patents

Abstract

A system has been revealed where a number of discs in a disc set can be accessed using a vertical row of readers including two servo heads, one located at or near each. The tip of the disk unit so that the fixed reading head is truly centered on the position The distances of the specified reading head relative to the track can be calculated by combining the signal proportions of the two servo heads from the web reader. The top and bottom of these proportions are dependent on the vertical distance of each servo probe from its predetermined readout, which is truly centered on the tary. The servo direction from the log edge is represented by S1, and the S2 is the vertical distance from the probe to the center of the servo head is represented by Y1, Y2, so the general formula for calculating the error correction for align Provides a general readout head, the center is Ec = 1 / Y1 + Y2X (S2Y1 + S1Y2).

Claims (1)

1. In a disk drive machine consisting of a number of record frames is connected to such a frame to be set in series and driven to be rotated motorized at a constant speed and is characterized by a track centered together. A large number is on at least one of the main faces of the plates and the vertical rows of the transducer reading head in a manner close to the main surface. include A bidirectional mechanical rotor is mounted in the frame near the recording disk. The head-mounted structure holds the aforementioned vertical rows of the transducer probe at one end of it and attaches to the aforementioned bidirectional mechanical rotor at its other end. The rotor drive path is connected to the aforementioned bidirectional rotor to move the probe mounting structure and the transducer head vertical row from the first passing track to the Track the second destination during track search. Two of the recording discs, one of them consist of the first and the second separate servos, with one or more of the remaining plates of each of them having a surface. One main page or one servo surface where only the servo data is stored. Two of the transducers' transducers consist of the first and second servo alignment transducers mounted in line with the servo surface being used. To provide a read head alignment signal as well as a long-established track error, record the first servo and the The aforementioned second and the aforementioned head position controllers attached to the transducer align the first and second servo heads to the said rotor drive path and to an external source. Of the transducer probe and the track selection data for calculating the track search command responds to the known position of the transducer and the said head alignment signal for ordering vertical rows. Of the transducer reading head to move from the first passing track to the second destination track during the search of that track and for adjusting the position of the transducer. The transducers of such transducers, which are assigned in relation to the averaged second track, are averaged, the read head alignment signal is fed back from the transducer. The first and second servos such proportions will depend on the transducer probe's distance, which is given from the transducer. The first and the second the aforementioned The read position controller also consists of a path to calculate the correction distance for the averaged function by combining the proportions of the said head alignment signal from the first servo head alignment transducer. And the second one to reduce the aforementioned vertical row error distances of the transducer probe from the said destination track and where the such correction distance path is calculated. The correction factor Ec is used to position the transducer's head, proportional to the second destination track (chemical formula), where Y1 is the distance according to The vertical from the transducer's designated transducer probe to the transducer align the first servo head, Y2 is the vertical distance from the transducer. The said transducer assigned to the second such servo head alignment transducer, S1 is the track error measured by the alignment transducer. The first such servo head, the S2, is the track error measured by the second servo alignment transducer and the transducer. For each of the aforementioned transducers Which is installed at different vertical distances from the transducer.Position the first and second servo head to provide different Ec correction in order to obtain The detailed location of the transducer probe's data in the aforementioned vertical rows of the transducer probe in relation to the track on the disk surface, face one 2. The disk drive recorder pursuant to claim 1, where such a read head, which is designated as an intermediate branch between the first servo alignment transducer, and the one. The second mentioned 3. The disk drive recorder according to claim 1, where the transducer aligns the head of the servo, consisting of a reading head near the top and bottom in the vertical row of the head. Read of the transducer 4. Record drive, according to claim 1, where the aforementioned probe alignment signal obtained from the transducer aligns the first and second servo head. The two are subsequently derived from the track crossing signal and where the disk drive consists of a track crossing monitor tuned to receive the motor alignment signal for the vehicle. A stimulus to measure the track skipping and to generate the current track address in response to that measured track skip. A comparator for getting the address of the current track and that of the second destination track and for comparing the address of the second destination track with that of the current track; and Calculate the comparator output signal by comparing the said address and the path to which it is connected, and the such correction distance calculation path for the inclusion of the correction signal. As mentioned, Ec with the aforementioned comparator output signal to produce a differential signal. The differential signal represents the desired actuator drive to reduce the specified distance of the aforementioned vertical row of the magnetic transducer probe from the second destination track. 5. The servo control system in the recording device. Using a magnetic log disc for aligning the specified row of the magnetic transducer reader's vertical row to the specified track, place a number of vertically on the surface of the system. There are a number of faces of a series of rotating magnetic recorders. The servo control system consists of Excitation motor with movable output shaft The carriage is moved by the output shaft of the excitation motor. The first and second servo plates in the set. Each one has a main surface used as a servo face. The first and second servo faces are separated by one and several on the rest of that surface of the template disk. Such a black The vertical row of the transducer arm, which will be attached to the aforementioned vertical row of the magnetic transducer reader head supported by the carriage, for movement close to the disk surface. The two such magnetic transducer probes consist of a first and second aligned transducer probe for measuring sir data. That includes track errors and track skip information on The aforementioned first and second servo faces and corrective paths are attached to the motor for such excitation and an external source of track selection data for calculating the position of the aforementioned vertical rows of the reading head. Magnetic transducers, relative to the specified row of the vertically oriented track, based on the said track selection information, the skipping data of the said track, and The calculated average proportion of the alignment data, based on the said servo data fed back to the rectifier, from the reading head of the aforementioned first and second alignment transducers to Minimize the specified row distance of the said vertical row of the magnetic transducer reader head from the specified track. Where the aforementioned correction path calculates the Ec error correction to be made in the specified alignment of the transducer's headers in relation to the specified ones of Proportional vertically aligned track (chemical formula) where Y1 is the vertical distance from the specified transducer probe to the probe alignment transducer. The first such servo, Y2, is the vertical distance from the transducer's probe, the one specified to the transducer, the second such servo head alignment, S1 is The track error was measured by the first servo head alignment transducer, and the S2 was the track error measured by the head alignment transducer. Read the second servo. 6. Record drive according to claim 5, where the transducer's first and second alignment heads contain a reading head near the reading head. The top and bottom in the vertical rows of the magnetic transducer head. 7. Record drive according to claim 1, where the aforementioned track alignment signals obtained from the servo drive disc. The first and the second loud This will be followed by a cross-track signal and where the disk drive also contains A track-crossing probe tuned to receive an excitation motor alignment signal for measuring the track crossing and to generate the current track address in response to the track crossing being measured. Had such Comparator circuit for the current track address and the desired destination track address and compares the destination track's address to the current address. And the comparator output signal calculations based on the aforementioned address comparison and the path that includes the difference registers attached to the comparator circuit and the aforementioned error calculation circuit for the Receiving and unification of the Ec error correction signal with the comparator output signal to produce a difference signal. Such a difference signal that represents the desired actuator signal. To minimize the distance of the selected line of the aforementioned vertical array of the magnetic transducer probe from the selected one of the such vertically oriented track. Magnetic disk memory In claim 7, where it is for measuring deviations, including the error calculation circuit (i) that supports the said servo data signal and the modified servo data signal, and in Response to a received signal that generates a deviation (chemical letter) of the aforementioned servo head; (ii) reception of an external rated probe selection signal that indicates a specific one from a group of A number of read heads are selected for accessing that data surface based on read / write access and (iii) deviation (chemical letter) generation of read head for access from deviation (chemical letter). Of the second servo head and the vertical distance Y of the said drive surface to be accessed by the aforementioned optional read head from the aforementioned servo head and the drive surface Such information to be accessed by the aforementioned read head, and (iv) the deviation (chemical letter) of the readings accessed in the register and where there is such a way for The controls will include A calibration indicator circuit that receives the desired track edge address new value from the new track address retention register and the current track edge address from the address store register. The address of the current track and creates a comparison of the track address that represents the difference between the current track's address and the address of the new track that requires a difference cycle. That accepts the deviation (chemical letter) of the reading head having such access and the comparative value of the said track in response to that reception generated as the corrected excitation motor drive value. Then and a digital to analog converter For converting the aforementioned modified excitation motor drive signal to an analog excitation motor drive signal to drive the said readhead to the desired insert address to obtain The detailed position of any read head in the aforementioned vertical rows of the read head in relation to the track on any record surface. 9. Servo control system. In a recording device that uses a magnetic disc for aligning the magnetic transducer reader's head at a specific row of the magnetic transducer's head vertical near to the one that is Specifies a number of tracks on the surface of a set of rotating magnetic recorders. The servo control system consists of an excitation motor with a moving output shaft. The carriage supported by the output shaft of the excitation motor. The first and second servo plates in the kit each have a main surface used as a servo face. The first and second servo faces are separated. By one or more of the above surfaces of the a rotating magnetic disc. The vertical row of the transducer arm, which is mounted on the vertical row of the magnetic transducer reader head, is supported by the carriage for movement close to the parent disk surface. The two magnetic transducer probes are composed of a first and a second alignment transducer probe for measuring servo data. Including the first and second servo error signals on the aforementioned first and second servo surfaces of the aforementioned first and second servo discs. A track crossing meter that supports the excitation motor alignment signal for measuring the track crossing and generating the address of the current track in response to the track crossing being measured. Had such The first register to store the address of the current track. A second register for obtaining and storing the desired new track destination address that is externalized. A comparator circuit connected to the aforementioned first and second registers for comparing the end of the new track with its current address calculates the comparator's output signal based on the value. Compare the current location with the address at the end of the new track. Correction circuit for calculating the cumulative error signal for a specific part of the vertical row of the magnetic transducer probe in response to the probe selection signal and the track. Externally entered and the calculated relative mean of the alignment data obtained from the aforementioned first and second servo error signals provided by the transdew's read head. Sir arranged the first and the second such. The path is connected to the aforementioned comparator circuit and the aforementioned correction circuit for the integration of the cumulative error signal and the said comparison output to produce a digital difference signal. The third register is attached to the combined path for collecting the aforementioned differential signal produced by the integral. Such digital differential signals that represent the actuator signal are used to reduce the distance of a specific object of that vertical row of a magnetic transducer probe from that. The specifics of such vertically oriented tracks are minimized and a digital-to-analogue converter for converting the said digital difference stored in the aforementioned third register into a signal. Analogs suitable for connection to such excitation motors Where the fault correction circuit calculates the cumulative error signal to alter the Ec fault correction signal that will occur in such a specific alignment of the transdew's probe. In relation to that specific one, request a track by relation (chemical formula), where Y1 is the vertical distance from the transducer probe specified to the transducer. Position the first servo probe Y2 is the vertical distance from the transducer's probe to the transducer, align the second servo head S1. Is the track error measured by the first servo head alignment transducer, and S2 is the track error measured by the head alignment transducer. Read the second servo 1 0. The servo control system according to claim 9, where the transducers are aligned, the first and the second will consist of the transducer probe. Transducer near the upper and lower probes in the vertical row of the magnetic transducer 1 head. 1. In a memory device of a number of disc-type magnetic recording mediums with one servo-over surface used to record servo data, a second servo surface, which at least part One of them will save the servos' adjustments and surface data according to read / write access. First servo head for reading servo data recorded in the first servo surface and generating a servo data signal indicating that servo data read out. A second servo for reading the modified servo data recorded in the said second servo surface and generating a revised servo data signal indicating the said revised servo data readout. One for writing data to the said data surface and reading it from that data surface and the drive path A reader attached to the said head for driving is one with the said head. The deviation of the read head assigned to the data surface that is given to it consists of the procedure of Receiving such servo data signals Receiving and modifying servo data signals Calculation of the deviation (chemical letter) of the secondary servo head in response to the said servo data. And the modified servo data signal Receiving an external provided probe selection signal that identifies a specific read head from a certain group of read heads will be selected for such surface access based on read / write access. The calculation of the deviation (chemical letter) of the read head of the access from the deviation (chemical letter) of the secondary servo head and the vertical Y of the said disk surface to be accessed by The selected reading head from the first servo head and the surface of that data to be accessed. The optional reading head follows the equation (chemistry letter) where X is the distance between the first and the second servo head, and y is the distance between the first servo head. And the log surface which is to be accessed by the reading head that accesses the one assigned to it Storing deviations (chemical letters) of the read heads accessed in the register. Obtaining a new desired track address from the new track address store register Obtaining the current track address from the current track address store register. Comparing the difference of the track address that represents the difference between the current track address and the desired new track address. The modified excitation motor drive is calculated by compensating for the different comparisons of the tracks with the deviation (chemical letter) of the read heads reached in response. Per acceptance of the deviation (chemical letter) of the read head to reach them and the comparative value The address of the track and the digitally corrected actuation of the actuator is converted to an analog excitation motor drive signal. This will drive the selected read head to the desired track address. It achieves detailed alignment of any read head in the vertical row of the read head in relation to the track on the disk surface.