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Design and Part Sourcing Help Needed

Discussion in 'New users start here - FAQ' started by Shaleeb, Jan 17, 2025.

  1. Shaleeb

    Shaleeb New Member

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    Hello, I bought a Fanatec base a few years ago and it has been collecting dust. Last night I decided with the coming cold weather (Pennsylvania) and no riding season in sight I would build a racing sim. This morning I decided I would add motion. A few years ago when I bought the fanatec I looked into the spx100 I think it was called. Although now I like D Max's and Doctor ADHD's build. I'm feeling slightly overwhelmed sourcing parts for the best price. I've already purchased these two motors:



    Screenshot 2025-01-17 151137.png


    I've seen the crab pot motors, but they seem to be all over the place in terms of quality and power ratings varying by manufacturer. Also the cheapest I could find them was a listing on ebay for $130 plus $30 shipping form Canada.

    I have a good 3D printer and a MiG welder I just can't weld aluminum. No lathe yet, but I have a drill press and other tools needed for basic fabricating. I also have automotive 12v experience just not small electronics. If I could get a good up to date build list from someone living in the US similar to Doctor ADHDs design I would be grateful. Or any advice to get me through this project cost effectively.




    dradhd2025-01-17 151941.png
  2. Attyla.pl

    Attyla.pl Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    Will try to help but first tell you exactly what you want to build 2DOF or 3DOF or something else.
    The Doctor ADHD platform is okay but it doesn't look the best optimized in terms of engineering :).
    Questions to start with:
    1. you bought the motors but nothing is known what voltage they are powered by? in the description is 12-24V , give the exact parameters voltage , max current consumption, number of turns
    2. what kind of movement you want to get pitch, roll, traction loss ?
  3. Shaleeb

    Shaleeb New Member

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    Will try to help but first tell you exactly what you want to build 2DOF or 3DOF or something else.
    The Doctor ADHD platform is okay but it doesn't look the best optimized in terms of engineering :).
    Questions to start with:

    I appreciate your help!
    I like 3DoF with what I believe he calls his surge which is the forward and backward motion for acceleration and deceleration.


    1. you bought the motors but nothing is known what voltage they are powered by? in the description is 12-24V , give the exact parameters voltage , max current consumption, number of turns

    this is what I know.
    IMG_3399.jpeg

    2. what kind of movement you want to get pitch, roll, traction loss ?

    Ideally those 3. Last night I sourced some parts, but can obviously change directions.
    2 30amp 12v psu
    2 50amp 12v psu
    1 sabertooth 2x32
    2 IBT-2
    2 Arduinos
    4 Hall effect


    I’m not a fan of how the battery is charged in his design. There is no charge controller so the battery can be over charged / under charged. And I’m not an engineer so I have no clue what needs adjusted.
    Last edited: Jan 18, 2025
  4. Attyla.pl

    Attyla.pl Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    I looked at other auctions on eaby seller of the engines you bought , unfortunately with each auction pastes the same description so it is not a valuable source of information.
    On the forum there are few designs that allow forward-backward movement in most of it is simulated by tilting down-top (pitch).
    If you decide to go with a layout like Doctor ADHD's you must somehow follow his idea for the design.
    Since you've already bought most of the hardware you just have to put it together.
  5. Attyla.pl

    Attyla.pl Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    You can dissipate the energy of the reverse current using the KBPC5010 diode is described on the forum
  6. Shaleeb

    Shaleeb New Member

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    I’m more worried about the power coming from the power supplies, not from the motors.

    I can always return components if you have a better design. The only dislike I have about the Doctor ADHD design is that there is no write up for it. There are 20 or so videos in the build series and each one is at least 20 minutes long. So it will take me a long time to go through and pick out the necessary info.
  7. Attyla.pl

    Attyla.pl Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    The problem is that there are few platforms with surge movement, so there is not much from kogom to follow, I do not know how much you have spent so far but look at this project
    https://www.xsimulator.net/communit...g-msfs-smc3-flypt-transducers-controls.19053/

    which admittedly is about flying but offers 6 degrees of freedom at low cost .
    and is built on new engines with known parameters ,
    He is currently building a 6DOF on the same engines but with a slightly different geometry layout with a lower seat and on different engine controllers , such a
    https://www.xsimulator.net/community/threads/reasonably-priced-100a-motor-controllers.17638/
    much cheaper than sabertooth2x32 and much more powerful than IBT2 :)
    a similar power of motors about 200W was used by Silentchill in their 6DOF
    https://www.xsimulator.net/communit...bertooth-2x60s-was-mms-and-arduinos-osw.6948/ from page 25 you can see how it can drive
    ,
    I'm building something similar only on 100A controllers and motors like in Ronan Design....
    Anyway a lot you will have to understand yourself rarely anyone gives all the dimensions. Anyway I would first read as much as possible on the forum and only then buy parts. Before building my 2DOF 2 months I read the forum :)
  8. Shaleeb

    Shaleeb New Member

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    Yes, I did see Ronan’s design on YouTube and here. I’m hesitant since I believe it isn’t done yet. I started to order parts only because I’m trying to get it built quickly before the weather warms up. Once it’s nice out again I’ll be back on the road and won’t want to be inside lol. Is this the best current bang for your buck? I’d like something semi reliable. Are these type of simulators good for car sim feedback?
    Last edited: Jan 18, 2025
  9. Attyla.pl

    Attyla.pl Active Member

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    +67 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
  10. Shaleeb

    Shaleeb New Member

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    Definitely looking for something way faster than that 6DoF. The last one you linked looks very simple using only square tube steel, but it doesn't seem to have much travel. Also thanks for sending the motor controllers I completely forgot about seeing those. I think I will build something like the last one you sent using square tubing since it is cost effective and Rigid just with more travel.
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