Floppy drive stepper motor driver

Oct 31, 2007 i want to use the stepp motor used in floppy drive. These motors have one of the shaft bearings on the end of the shaft, and the other inside the motor. Information on floppy disk formats needed pc can read every floppy disk. The arduino cant directly drive motors, so you will first need a driver, to amplify the signals from the arduino to a level useful for the motor. Yup, it can nelson is kicking butt with a new make controller project and shows you how, he writes this is the second in a series of postings about the makezine controller. By moving the read head at different speeds, the motor produces different pitches which are then amplified by the drive casing. 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. There are countless projects online that start with harvest the stepper motor out of an old cdrom drive. Quick steps to service a broken floppy drive techrepublic. Stepper motors require a stepper controller to energize the phases in a timely sequence to make the motor turn. A second stepper motor moves the readwrite heads figure b.

It can control both speed and spinning direction of of any bipolar stepper motor like nema 17. I think the bipolar stepper motor doenst work because you also have to change current per coil. Getting floppy drive stepper motor to work electrical engineering. One of the easiest and inexpensive way to control stepper motors is to interface l298n motor driver with arduino. Shop for stepper drive and other high quality components on sale. Stepper motor floppydisk 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 mode, 128. The simplest type of driver can be built with a handful of transistors. I used a 5v from my power supply and tested the motor while still connected to the floppy circuit. Used with a dual bridge driver such as, machines, robots, floppy disk drives, electronic sewing machines, cash registers, photocopiers, telex, of stepper motor in. How to reusing a floppy stepper motor make controller kit. To overcome the inductance and switch the windings quickly, one must increase the drive voltage.

Most of systems controlling stepper motors are embedded systems such as printer, scanner or floppy disk drive. Getting started with musical floppy drives parts not included. The floppy stepper motor has 4 wires and the unipolar stepper motor has 5 wires. Make a fun spiral drawing robot out of an old floppy drive and. The head is stepped from track to track as the disk rotates.

Oct 27, 2018 a chopper drive can run the stepper motor with much higher voltage than the motors rated voltage. D this is an easy way for you to get a basic understanding of how stepper motors work. 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. Driving a stepper motor is a bit more complicated than driving a regular brushed dc motor. These are simply switched on and off in sequence to energize the phases. Getting started with musical floppy drives parts not. Pcb, 368 floppy disk stepper motor, 365367 fullstep drive, 373 halfstep drive. Just a demonstration of a hack on a floppy disk drive that steps the stepper motor. Vintage computer floppy drives for ibm for sale ebay. Vintage ibm pc xt floppy drive rw position stepper motor only 5. Many of these projects look super fun, but i dont have a pile of old cdrom drives around gathering dust. I am writing this because i wanted to start fiddling with stepper motors and i knew i had one in my unused floppy drive.

A chopper drive can run the stepper motor with much higher voltage than the motor s rated voltage. What i did was to test if the motor in a floppy worked before pulling it off. To make a cnc machine, you need to use stepper motors. Mar 15, 2007 a similar process happens inside a stepper motor, but the magnet is cylindrical and rotates inside the coils. When i connect pin 12 to my drive the led will light but blinks instead of a solid green, the other issue is when im probing the pin 20 for step the motor this actually works but in a jerky form, it moves in both directions. Often though, you will have a motor with no markings whatsoever and four, or six colourful wires sticking out. Oct 31, 2007 i am using stepper motor of 3 12 floppy drive. The floppy drive s low cost and ease of installation have made it virtually disposable. The stepper motor the one that moves the head back and forth was making ugly noises and wasnt turning although it was getting the right signals. This is the single connector on one end of the cable and is used for connecting the floppy disk controller, either on a. Controlling the stepper motor from a floppy drive i replicated the solution but there is some problem i cant figure out. This device works great with a old floppy drive stepper motor. If you are lucky, there will be a part number on the motor and after some digging around, you will come up with a datasheet.

Disk drive motors rotate the disk at 300 or 360 rpm speed. The driver features adjustable current limiting, overcurrent protection, and five different microstep resolutions. Then use direction and step pulse signals to control the steper motor. The brushless motor is usually wired like a stepper motor, except the control circuit is usually a selfcontained clock driver chip. Torque curves may be extended to greater speeds if the stator poles can be reversed more quickly, the limiting factor being a combination of the winding inductance. How to drive a stepper motor simplified beginners guide. Getting floppy drive stepper motor to work electrical. Vintage ibm pc xt floppy drive motor only buehler 5. Did you know that the make controller can easily drive a floppy disk head positioning stepper motor. The following program illustrates how to signal the four leads of a bipolar stepper motor for it to rotate. How to reusing a floppy stepper motor make controller. The brushless motor is usually wired like a stepper motor, except the control circuit is usually a selfcontained clockdriver chip.

For a stepper motor to move, these coils should be turned on in the correct sequence. 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 moves the readwrite. Duane johnson and wilf rigter came up with this interesting 74ac240based circuit to drive small bipolar stepper motors e. They allow to control any motion with high precision by counting the number of steps applied to the motor. Getting floppy drive stepper motors to talk to arduino uno. Pulse this signal at a specific frequency and the drive s vibrations give off sound like a. If you are planning on building your own 3d printer or a cnc machine, you will need to control a bunch of stepper motors. The sound generated by a motor depends on its driving speed. Using old stepper motors from old hardrives floppy drives.

The floppy drive readwrite head is on a stepper motor and threaded shaft. Scanners and floppy drives use stepper motors to move the head with sensors which scan an image or perform readwrite operations on a magnetic disk. Higher voltage allows the current to flow through the stepper motor faster, which gives the ability to turn it faster with more torque. How to determine bipolar stepper motor wiring came from a. I was doing my usual, browsing youtube when i saw some floppy drive music. Nov 20, 2010 generally stepper motor are costly, in india the stepper may cost around 250 to 500 rupees, to reduce the cost you can use a stepper motor from a floppy drive. Here ive wired the knob directly to the motor driver, no processor required. The readwrite head assembly in this floppy drive is connected to the stepper motor via a screw drive. Aug 11, 20 so far this device is being used on a old floppy drive stepper motor to move a camera long a track. Having known that floppy drives are controlled by stepper motors, i decided to make my own stepper motor sound generator. Driving a stepper all about stepper motors adafruit.

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 mode, 128 uln2003a driver chip, 122 units, 214. The one we use has 6 connectors of which one is power vcc and the other four are used to drive the motor sending synchronous signals. Given the maximum current of roughly 200ma, this circuit can be used to drive a small bipolar stepper motor operating between 5v and 12v, such as the stepper motors found in most floppy drives and cd dvd drives. Stepper motor performance is strongly dependent on the driver circuit. I am expecting the index to pulse when the disk motor makes a rotation, and for track 0 to change when i am at the outside of the disk, but they. Sep 11, 2007 a floppy drive has two motors, one that rotates the spindle and drives the disk, and another that positions the readwrite head. Floppy drive stepper motor wiring the sth39d704 75ohm stepper motor, from a pc clone halfheight 5.

I had seen that people had done this before, but every instance had either not shared the code or their code was highly flawed andor limited. 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. Sep 08, 20 floppy drive stepper motor hack using a pc psu and an old drive and cable. Disk drive interface stepper motor control signals.

So far this device is being used on a old floppy drive stepper motor to move a camera long a track. The four control inputs 1,2,3,4 can be driven with arduinos digital pins i. This motor makes a precise number of stepped revolutions to move the readwrite head assembly to. 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. Stepper motor in floppy drive free microcontroller projects. Controlling floppy drive stepper motor via parallel port codeproject. Drive keeps current in the motor below the fixed value which keeps motor burning out. Generally stepper motor are costly, in india the stepper may cost around 250 to 500 rupees, to reduce the cost you can use a stepper motor from a floppy drive.

Misumi offers free cad downloads, short lead times, technical support and competitive pricing on over 80 sextillion parts. Motor drive topologies an235 1023 doc id 1679 rev 2 4 motor drive topologies for a stepper motor, the motor current is determined primarily by the drive voltage and the motor impedance resistance and inductance. 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. One of the wires is a common which is tied to one side of each of the four unipolar coils. Driving unipolar stepper motors using c51 c251 introduction stepper motors are commonly used in accurate motion control. Floppy drive stepper motor scanning system laser pointers. A simple and popular drive topology is to supply only as much voltage as needed, utilizing the resistance rl of the winding to limit. 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. The stepper is for moving the heads, not for spinning the disk the stepper just requires four drive transistors and the correct sequence, but its too slow for a propeller clock. The teac floppy typically uses a 5 wire stepper motor. Hard disks use a magnet and a coil to position the head. You can easily determine which wire is the common by using an ohmmeter. I even figured out the sequence required for it to go.

As fate would have it, i was recently introduced to the arduino through sarfly, a local rcmodel yahoo group thanks wessie. Nov 22, 2014 occasionally you may come across an old stepper motor salvaged from a printer, or an ancient floppy drive. The following schematic shows a simple dual hbridge using eight general purpose transistors 2n3904 and 2n3906. Sep 26, 2006 why motor from hdd is they are quite at high rpm. Diskettes spin at some rotational speed under a readwrite head. Parts of a floppy disk drive how floppy disk drives work. It takes a quadrature input like used in volumeknobs or the scrollwheel in your mouse to move a bipolar stepper motor the kind that only have four wires, often found in floppy drive and dvd drive sleds. Disk drive motors are quite nice motors quite accurate speed control system. The following signals are used to control the disk drive stepper motor controller circuit.

The differences in the stepper motor makes the motor develop different problems than the problems found on a standard motor. Controlling floppy drive stepper motor via parallel port. The stepper motor used for running the disk in the fdd are generally hybrid stepper motor. 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. This page shows two examples on how to drive a bipolar stepper motor. I want to learn how a floppy stepper motor works so that i can latter control it with my arduino. Standard drives use 300 rpm, but highdensity drives use 360 rmp or selectable speed 300360 rpm motors. The latter is an integral part of the drive and probably of little use for anything else.

Making music with floppy drives works because the stepper motor that drives the readhead is so noisy. These motors can be found in old floppy drives and are easy to control. Use drive select signal to select the drive electronics. The 74ac240 stepper driver works by alternately enabling each half of the buffer.

How to make musical floppy drives using an arduino use. For higherlevel control of a stepper motor, consider our tic stepper motor controllers, which feature some of the same stepper motor driver ics as our carrier boards combined with an onboard microcontroller that intelligently generates the lowlevel control signal in response to a variety of interfaces, such as usb for direct connection to a computer, ttl serial and i. However, we dont have to worry about this since we will be using the floppy drive s built in controller. Get the best deals on vintage computer floppy drives for ibm and find everything youll need to improve your home. This page shows two examples on how to drive a unipolar stepper motor. Our stepper motor drivers offer adjustable current control and multiple step resolutions, and they feature builtin translators that allow a stepper motor to be controlled with simple step and direction inputs.

The drive motor connects to the metal center of a floppy disk and spins it at either 300 or 360 revolutions per minute. The stepper motor can be useful but if you know enough to use it than it ought to be fairly simple to test it. Connect your floppy to your power supply and test the stepper motor. The stepper motor used for running the disk in the fdd are generally hybrid stepper motor,in case you want to know what is stepper motor can you can read in wikipedia, it has detailed. A floppy drive has two motors, one that rotates the spindle and drives the disk, and another that positions the readwrite head. Notice that if you connect your floppy drive to the power supply nothing is happening, that is because you need to connect pins 11 and 12 to activate it. Apr 10, 2017 making music with floppy drives works because the stepper motor that drives the readhead is so noisy. Stepper motor floppydisk 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 mode, 128 uln2003a driver chip, 122 units, 214. Oct 17, 2006 did you know that the make controller can easily drive a floppy disk head positioning stepper motor. The a4988 stepper motor driver carrier is a breakout board for allegros easytouse a4988 microstepping bipolar stepper motor driver and is a dropin replacement for the a4983 stepper motor driver carrier. Driving cdrom stepper motor with arduino electronics diy. Nov 14, 2012 the stepper motor or the one that drives the disk.