Cd Rom Drive Read Head Mechanism Hacked
| HOW A FLOPPY DISK READS & WRITES Data | ||
| QUESTIONS OR COMMENTS | ||
 | AUTHOR: | Michael Ramirez |
| E-mail: | marekim@MIT.EDU | |
| COURSE: | two | |
| Course/YEAR: | 2 | |
MAIN FUNCTIONAL REQUIREMENT: To transfer information between calculator and floppy disk tracks.
Design PARAMETER: Floppy Disk Drive Read Write Elements
GEOMETRY/Structure:
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| Position of Read Head Relative to Disk Track |
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| Read Write Element Used To Read A Floppy Disk |
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| Peak View of Deejay Reading Machinery |
Photo A courtesy of: Accurite Technologies; http://world wide web.accurite.com/FloppyPrimer.html
Photos B & C courtesy of: Middle for Magnetic Recording Research at Academy of California, San Diego; http://talke08.ucsd.edu/index/disk.html
Caption OF HOW It WORKS/ IS USED:
When the floppy deejay drive is first powered upwards, the rotary actuator and the index sensor both work together to identify the read/write heads over track 0 (starting track on a floppy deejay). Once the sensor has reached this starting track, the computer is at present ready to recollect or write files onto the floppy disk.
The read/write heads are precise instruments, and caput misalignment is a mutual problem in many floppy disk drives. The radial positioning of the head is the about common type of misalignment. Past radial, information technology means that the head is displaced along the radius of the disk. The head is considered out of specification if it is displaced from the nominal standard more than +/- 600 millionths of an inch. Some other type of misalignment which occurs in floppy disks concerns the azimuth of the head, which is the angular alignment on its vertical axis. These two alignment factors are critical in reading and writing onto disks, because if either the radial or azimuth are off specification, floppy disks which have received data from this drive may be unreadable on other drives.
As the bulldoze begins to receive information from the computer, or from the disk when retrieving files, the rotary actuator moves the suspension arm out runway by track depending on the number of step signals information technology receives from the figurer arrangement. The floppy drive arrangement is bullheaded, and relies on these signals to place it over the correct track on the floppy disk. If one of the higher up mentioned misalignments occurs, the magnetic caput wouldn't know any better, and therefore would read/write data in the wrong place. The heads are leap loaded using a caput flexure to assist them stay in physical contact with the spinning disk.
The motor spindle is probably one of the most important parts in the reading and writing process of a floppy deejay drive. It serves every bit an indicator of the spinning disk'southward speed, which is expressed in revolutions per minute. The spindle must rotate the disk at 300 RPM to be sure the recorded data will arrive at the floppy controller with the correct frequency. If the deejay spins likewise slow, the frequency will be too low, and would exist unreadable by the magnetic floppy disk. If the motor were to spin besides fast, the frequency would exist too high, and when information is being written, the writer would not be able to store all the information necessary on the given track later one revolution.
Dominant PHYSICS:
The data retrieved and written onto a floppy disk is controlled by the procedure of magnetic encoding. Equally the read/write head passes over designated tracks of the floppy deejay it uses magnetic polarization to write information onto the deejay, and to retrieve this information. In the reading and storing of data, the head uses the binary numbers 0 and i which correspond to the north and due south poles of a magnet. Existence that these ii components (the read/write caput and the floppy disk) are both magnetized, the estimator sends either a positive or negative voltage to the head which encodes this into a serial of 0's and ane's corresponding to north and south. The opposite process is washed when the head is reading information. The head picks up a signal from magnetized parts of the disk and the read/write caput, and sends the data to the figurer, converting the charges to binaries.
LIMITING PHYSICS:
None Submitted
PLOTS/GRAPHS/TABLES:
None Submitted
WHERE YOU CAN FIND FLOPPY DISK DRIVES:
Floppy disk drives are by and large standard equipment for most personal computers, merely with the now common utilise of CD ROM drives, newer desktops and laptops are missing floppy disk drive engineering science. If a figurer does not have a floppy deejay bulldoze, an internal or external drive could be bought separately.
REFERENCES/MORE Data:
Hardware Central
Talke Group Domicile Page
Accurite Floppy Disk Primer
Source: https://web.mit.edu/2.972/www/reports/floppy_drive_read_write/floppy_drive_read_write.html
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