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3-Phase Brushless DC Motor

rabr2ro

Hi,

 

I started playing with electronic circuits few months ago, so I'm a newbie in this area. I brought myself an Arduino Uno, a breadboard some components and tools and, so far, I've done some small circuits with success. Two weeks ago I enter in possession of some DC motors and, since then, I'm trying to spin one of this motor. No movement, so far. The motors I had to dismantle from a laser printer. Using part of the number from the motor label (see first attached image), I found this PDF file, where 24H model seems to be closest to what I have.  I've tried connecting DC motor to a 12 volts batteries package and use the Arduino to send corresponding signals to the pins indicated in the above PDF document (PWM included for speed control), but I had no movement. Worse than that, trying different wiring and combination, I fried my Arduino board (it is not installing anymore as an Arduino Uno when connected to PC via USB cable). Yesterday, I dismantle one of the motors trying to figure out how should I wiring it (see attached images), but being a newbie, it doesn't help me at all.

If someone had something similar or can figure out more from attached images, I appreciate if he/she give me a helping hand, here. If I miss some information or more details are needed, please ask and I'll try to provide.

 

Thank you in advance to anyone who find some time to look into my problem.

 

Radu

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  • Hi Radu,

     

    It may be straightforward. Looking at your IMG_2, you can follow the fat traces to see the power lines, it looks like pin 2 on the connector is 0V (the electrolytic cap black mark is usually the negative side, and pin 1 looks like it is going to a large area of copper, so that is possibly the motor supply voltage.

    The next four pins (pins 3,4,5,6) appear to go to some resistors or some input protection, and route out to the underside of the PCB, and then in the direction of the IC, so they may be the control inputs (like enable, direction, and the step pulse).

    The remainder may be feedback or some other purpose, and may not require interfacing.

    So, with the pins 3,4,5,6, you could try a few combinations (and pulse one of them), to see what occurs. But first, confirm they are inputs (and not outputs) by trying to pull them high or low with a 1k resistor, and measure with a multimeter to see if it gets pulled or not. If it doesn't, then it is an output!

     

    Good luck. And apologies if this info is incorrect and destroys the motor :-(  You could try contacting the manufacturer, or inserting back into the printer and monitor the voltages when it rotates.

  • in reply to shabaz

    Thank you for your quick response. I had no ideas what to do, so, your response is hightly apreciated. I definitly will try playing with those pins (3,4,5,6) as you suggested.

    The concern that I might distroy the motor is low, because if I cannot make it spin, is no use for me at all. Unfortunately the printer from where I've taken this motors is gone, scrapped. Probably disasembled, melted or I don't know what they do with these printers.

    Again, thank you very much for your input.

    Radu

  • So far, I had no success in making this motor work. So I decide to give them away, for free.

    I have 4 pieces that looks as you can see in IMG_1.jpg. I don't know if they are working or not, because I could not spin the one that I've tried.

    The wires at the other end are cut, so you can solder your whatever you want.

    Except the PDF from this page http://www.nidecamerica.com/admcmc/admcmc.htm, I have no other datasheet for this motors.

    If someone out there wants them, send in private an email address and we can discuss about shipping details. The motors are free, but you might have to pay the shipping costs.

    Radu