The back-EMF in the floating phase will result in a ìzero crossingî when it crosses the average of the positive and negative supply voltage. Others here have mentioned timer and inverter IC's would work if you wanted to go that far. We're about the same age, (I'm a year older)Click to expand... is analog circuitry really necessary? have a peek here
I can't get it to stay spinning. In every commutation step, one phase winding is connected to positive supply voltage, one phase winding is connected to negative supply voltage and one phase is floating. For a HDD motor, you probably only need one that's designed for 5-10 amps. Next, connect the board to a computer power supply. http://www.robotshop.com/letsmakerobots/howto-walz-a-hard-drive-spindle-motor
Before, ball bearings were used, while now, almost exclusively fluid bearings secure rotation of HDD spindle motors. No, just adding photos. The hard drive motors, in particular, are extremely smooth-running, and I wanted to see how to drive them. The flex that is connected to the plastic connector is just to provide a connection to the PCBA.
Hardly 'self-starting' You then go on to describe the processor based electronics that starts it and runs it. Usually there's example code as well. I will admit that much of what was said is beyond my grasp but still helpful.As you might have noticed in the second photo, I attempted to solder copper wires to Spindle Motor Working Principle PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk Nigel Goodwin, Jun 26, 2009 #4 Frankco New Member Joined: Apr 5, 2009 Messages: 14 Likes: 0 Hi mrmmani22, You can send a
Possibly different rated switches and/or biasing could adjust current, voltage or timing and make it more efficient. Circuits To Run Hard Disk Drive Motor They needs lots of software to do anything useful. Do it slightly wrong an you lose all the power. https://arstechnica.com/civis/viewtopic.php?t=1169339 However, you're not in luck, because driving that motor isn't going to be as easy as you hoped.
I guess the frequency a which the 3 sine wave or square wave signals would also need to ramp up from 0 to keep up from the physical inertia of rotating Hard Drive Motor Controller Dismiss Notice how to use hard disk spindle motors Discussion in 'Robotics & Mechatronics' started by mrmmani22, Mar 7, 2006. This motor is definitely harder to drive than a typical stepper motor.When initially starting up the motor, you need to start the pulses at a slow rate. What would i need to power it? 1-10 of 25Next »FEATURED Insider Tips Regarding Featuring and the Makerspace ContestHello there! : ) My name is Sam and I work for Instructables
Yes, my password is: Forgot your password? http://www.electro-tech-online.com/threads/how-to-use-hard-disk-spindle-motors.20233/ This note applies to BLDC motors with trapezoidal back-EMF. Powering A Hard Drive Motor plz if anyone has some idea share it with me.... ΠΠ√-\√-\'''/_ maazbuzdar, Jun 25, 2009 #3 Dave New Member Joined: Jan 12, 1997 Messages: - Likes: 0 Dave, Dec Run Hdd Motor Without Extra Circuitry The motor will spin up.
Nowadays you can get BLDC motor controllers from hobby stores, etc. navigate here Fear not, it is possible. How are your results? motor works so I wanted to see if I could create a discrete component circuit that would work just for the heck of it. Hdd Spindle Motor
And some patience.The resistance through any connection from a colour to a colour would be about twice as much.The bottom lineYou're probably better off using a microcontroller after all!Watch this space They will 'cog' if you start at high speed, so set the pot low and bring it up slowly. All rights reserved.Terms & Conditions FeaturedWrite an InstructableClassesContestsForumsAnswersTeachersCOMMUNITY : FORUMS : SQUARE PEGSsearch forums:New Forum Topic hard drive spindle motor?I have a hard drive spindle motor that i have taken off http://tuiconverter.com/hard-drive/hard-drive-driver-x60.php This is a decent option.
The windings are set up in a "wye" circuit pattern; the fourth contact on the connector is the center tap. Hard Drive Motor Arduino Driving the motor with a square wave, I am able to reach speeds just over 100Hz (6000 rpm) before the motor begins decreasing speed. Stator core is rigidly tied to the hard drive casing.
The last class I took that had anything to do with electricity was an automation course where we built our own automated, continuous loop, cells using Micrologix 1000 programmable logic controllers I also went ahead and soldered some wires on there as best I could, but it is still a momstrosity that moves around a lot, and can touch the motor housing. The three phases are provided by sets of P and N channel mosfets driven by a microcontroller( usually Atmel )...To start the motor the micro energises 2 of the phases and How To Run A Hard Drive Motor It said IBM on the cover, as seen here:Ah, that drive's older than I thought.
Thursday, February 4, 2010 Using a hard drive spindle motor for projects I was recently staring at a pile of 15K RPM SCSI drives that had gone bad at work. This technique is also used in RC model motors, although they usually just have three wires (no common). The platter carrier, along with the platter tier is rigidly attached to the rotor shaft. http://tuiconverter.com/hard-drive/hitachi-hard-drive-drivers-for-xp.php You will need some sort of active control with feedback to get any sort of performance at all. 7Krpms is cooking along pretty good, and you're certainly never gonna get there
Powered by Blogger. Nice tutorials on your web pages. This technique is actually slightly more efficient, but is much worse as far as acoustic noise generation goes. Expensive.
Fixxxer Ars Praefectus Registered: Mar 19, 1999Posts: 3191 Posted: Fri Mar 16, 2012 8:10 am Do you have any recommendations for one? I've a maxtor 40GB HD's spindle motor(4 terminals). and it would be nice to achieve about 7000 rpm like the original driver.So what do you think? PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk Nigel Goodwin, Jun 27, 2009 #16 Frankco New Member Joined: Apr 5, 2009 Messages: 14 Likes: 0 Feel like it anyway, at least
The motors all run pretty well - the hard drive motor is around 6000rpm with a 12V supply, and the ZIP drive motor is around 15000rpm (way too high for the The waveform on each pin was extremely complex, actually so complex that all of my Agilent and Tektronix digital scopes had a hard time capturing the waveform. do I need a micro-controller? S2 is the little white wire in the video that "boots" the sequence.
Newer Than: Search this thread only Search this forum only Display results as threads Useful Searches Recent Posts More... The circuit with the driver is much simpler:The EN/able pins apparently do not need pulling down to work. Looking at a drive with my scope I could see that this was definitely not the case. Additional conditions set in front of spindle motors are low noise, low cost, low power consumption and less heating during operation.