Its probable that the motor pin controls the spindle rotation usually theres a multiphase ac motor for that while the direction and step control the stepper motor that through a screw drive. It is possible to use the stepper motors from floppy drives and cddvd drive from unused left out drives. How to determine bipolar stepper motor wiring came from a. The position of the head is controlled by a stepper motor, and floppy drives have a convenient interface that moves the head one track at a time with a signal pulse to the right pin. Getting started with musical floppy drives parts not. I have pins 7, 15, 17, 19, and 25 from the floppy all grounded to my arduino, and i have pins 8, 16, 18, 20, and 26 from the floppy connected to my arduino as output pins so i can control the drive. Latest of the two sizes, this fdd supports the floppy disks of capacities 720kb and 1. Perhaps the stepper motors present in floppy drives may not be optimal for this project i just have a lot lying around and thought it might be a way to put them to use. The drive motor connects to the metal center of a floppy disk and spins it at either 300 or 360 revolutions per minute.
I even figured out the sequence required for it to go. The following program illustrates how to signal the four leads of a bipolar stepper motor. How to reusing a floppy stepper motor make controller. The motor s position can then be commanded to move and hold at one of these steps without any position sensor for feedback an openloop controller, as long as the motor. Making music with floppy drives works because the stepper motor that drives the readhead is so noisy. Higher voltage allows the current to flow through the stepper motor faster, which gives the ability to turn it faster with more torque. Notice that if you connect your floppy drive to the power supply nothing is happening.
The head is stepped from track to track as the disk rotates. Pulse this signal at a specific frequency and the drive. Fdd floppy drive stepper motor the stepper motor used in the floppy drive are generally hybrid stepper motor. The stepper motor the one that moves the head back and forth was making ugly noises and wasnt. I want to learn how a floppy stepper motor works so that i can latter control it with my arduino. A second stepper motor moves the readwrite heads figure b. A floppy drive has two motors, one that rotates the spindle and drives the disk, and another that positions the readwrite head. If you are planning on building your own 3d printer or a cnc machine, you will need to control a bunch of stepper motors. Stepper and drive motors alan computech international. The steps given below shows how to identify the wires of the stepper motor. Ive used stepper motors from old 514 inch floppy drives.
Connect your floppy to your power supply and test the stepper motor. The shaft is frequently fitted with a drive screw figure above. What i did was to test if the motor in a floppy worked before pulling it off. The floppy drive readwrite head is on a stepper motor and threaded shaft. Bipolar stepper motor this page shows two examples on how to drive a bipolar stepper motor. This device works great with a old floppy drive stepper motor. One of the easiest and inexpensive way to control stepper motors is to interface l298n motor driver with arduino. Our stepper motor drivers offer adjustable current control and multiple step resolutions, and they feature builtin translators that allow a stepper motor. Though, i do think some sort of stepper motor might be useful for a project like this, as those quarterhalf turns would need to be precise.
The one we use has 6 connectors of which one is power vcc and the other four are used to drive the motor sending. Controlling the stepper motor from a floppy drive hello, im new to electronics and i was following a project i saw on youtube where you could control via parallel port with pins 12,18 and 20 the motor of the drive. A very small spindle motor engages the metal hub at the center of the diskette, spinning it at either 300 or 360 rotations per minute rpm. The direction of movement will depend on the highlow state of pin 18. It can control both speed and spinning direction of of any bipolar stepper motor like nema 17. This may move the heads of a floppy drive upon command by the floppy drive controller. It is used for rotating the fdd disk in clockwire or anticlockwise direction. We wont be taking the stepper motor out from the floppy drive because a floppy drive has a built in controller which can be easily used for controlling its stepper motor. The stepper motors used in 5 14 floppy disk drives usually move the readdrite head using wheel and spring mechanism which works quite well. The floppy drives low cost and ease of installation have made it virtually disposable.
Drive keeps current in the motor below the fixed value which keeps motor. I used a 5v from my power supply and tested the motor while still connected to the floppy. Shop for stepper drive and other high quality components on sale. The stepper motor can be useful but if you know enough to. Just a demonstration of a hack on a floppy disk drive that steps the stepper motor. Home printer parts dell stepper and drive motors stepper and drive motors dell 2. Even early hard disk drives also used steppers, but nowadays hard drives have replaced the teppers with voicecoil servo motors. The latter is an integral part of the drive and probably of little use for anything else. Getting floppy drive stepper motor to work electrical. The readwrite head assembly in this floppy drive is connected to the stepper motor via a screw drive shaft. The four control inputs 1,2,3,4 can be driven with arduinos digital pins i. According one informatin source those stepper motors used in disk drives. Quick steps to service a broken floppy drive techrepublic. So far this device is being used on a old floppy drive stepper motor to move a camera long a track.
Now, since pins 20 and 18 are connected to pins 2 d0 and 3 d1 on the parallel port, pulsing pin d0 will move the stepper motor. Floppy disks are read and written by a floppy disk drive fdd floppy. The brushless motor is usually wired like a stepper motor, except the control circuit is usually a selfcontained clock driver chip. How to make musical floppy drives using an arduino use. Controlling floppy drive stepper motor via parallel port.
Parts of a floppy disk drive how floppy disk drives work. Did you know that the make controller can easily drive a floppy disk head positioning stepper motor. These motors can be found in old floppy drives and are easy to control. Floppy drive stepper motor scanning system laser pointers.
I am expecting the index to pulse when the disk motor. Floppy disk drives use stepper motors for controlling readwrite head position. Floppy drives are old enough technology that they dont have integrated drivers. The floppy disk drive comes in two sizes with varying capacities. Getting floppy drive stepper motors to talk to arduino uno. Stepper motor floppy disk see floppy disk stepper motor fullstep drive mode, 128 halfstep drive mode, 129 input levels, 125 poweron resetboot, 126127 software see software, stepper motor wave drive. D this is an easy way for you to get a basic understanding of how stepper motors work. Misumi offers free cad downloads, short lead times, technical support and competitive pricing on over 80 sextillion parts. I used a 5v from my power supply and tested the motor while still connected to the floppy circuit. Stepper motor drivers are specifically designed to drive stepper motors, which are capable of continuous rotation with precise position control, even without a feedback system. A chopper drive can run the stepper motor with much higher voltage than the motor s rated voltage. A stepper motor, also known as step motor or stepping motor, is a brushless dc electric motor that divides a full rotation into a number of equal steps.
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