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Choosing a 12V DC Motor (in the US)

Discussion in 'Motor actuators and drivers' started by Yoder_, Sep 6, 2014.

  1. Yoder_

    Yoder_ New Member

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    Hey sim experts, I'm weighing several options for 12V DC Motors... here's my picks, ranked from best to worst (in my opinion):

    I don't think I've ever seen anyone discuss the 179 RPM motor from Surplus Center. The specs look good, but the torque looks so weak compared to the other; surely thats torque before gear reduction?

    I'm also not sure how I want to drive these. The JRK seems the easiest, but costly. I've been looking at:

    http://www.ebay.com/itm/free-shippi...523?pt=LH_DefaultDomain_0&hash=item4625d325f3

    ...coupled with an Arduino and an external 16-bit ADC and some pretty basic serial parse/PID code.
    Yoder_, Sep 6, 2014
    #1
  2. BlazinH

    BlazinH Well-Known Member

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    Hi Yoder_ , In order to get the best advise from “experts” here they need to know what you are building and some of the details with your questions please. There is not a one size fits all solution. It would probably be best if you start a project thread.

    That being said, for a simple 2dof chair mover, the faster crab pot motor on ebay would be preferable unless you need more torque. I have looked at the motors from surplus center also but never asked questions. If you really want more info why don’t you ask them? They have an ask a question link right on the products page or just call them.

    I don’t know much about Chinese h-bridges except it seems you never know if they’re any good until you try them. So, in the long run, using a Jrk or an Arduino with a sabertooth motor driver may actually be cheaper (and less headaches).

    I have also looked into adding secondary adc’s in order to increase resolution. While it may be beneficial when using over 180 degrees motor rotation or with a high resolution actuator, I have found that 10bits is usually more than sufficient.
    BlazinH, Sep 6, 2014
    #2
  3. bsft

    bsft

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    @Yoder_ , any of those motors will do, Just depends on what frame design you have in mind.
    yes JRK is expensive compared to ard and h-bridges , but eaiser to get going for noobs (points to himself) that have no idea how to code or wire up.
    @BlazinH , no "experts" here, just people whom have made enough mistakes to know whats right and wrong.
    bsft, Sep 7, 2014
    #3
  4. BlazinH

    BlazinH Well-Known Member

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    @bsft
    Actually that’s what I meant myself by emphasizing the word experts in quotes, we don’t consider ourselves experts.

    But then again, I think making enough mistakes to know whats right and wrong is what makes someone an expert! Considering the amount of people with knowledge on motion simulators, especially 2dof chair movers, don’t sell yourself short, you “are” an expert!
    BlazinH, Sep 7, 2014
    #4
  5. BlazinH

    BlazinH Well-Known Member

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    @Yoder_ bsft is right that all of those motors will work depending on your frame design. But I’m concerned that even if the torque reading is incorrect for the surplus center motor, that it will have enough power for a heavier rider. At 12v and 12 amps it should have around 144 watts of power, which I personally think is a little low. So again, if you want the best advise from “non-experts” here then we need to know more to let you know what we think will work best with your rigs design.
    BlazinH, Sep 7, 2014
    #5
  6. Yoder_

    Yoder_ New Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    Yoder_, Sep 8, 2014
    #6