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Showroom Building my first 2DOF (without welding or a steel frame)

Discussion in 'DIY Motion Simulator Projects' started by Brie69, Jul 3, 2018.

  1. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    If you go with 24V then use a suitable controller, like the Sabertooth.
  2. Brie69

    Brie69 Member

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    Than
    Thanks for the quick reaction Noorbeast!
    I have now ordered two used wheelchair motors in the Netherlands for 70 euros.
    It is clear to me now that I have to look for a Sabertooth and a new PSU.
    But can you tell me where I can the 24V psu?

    Greetings,
    Bryan
    Last edited: Nov 1, 2018
  3. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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  4. Brie69

    Brie69 Member

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  5. Brie69

    Brie69 Member

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    For those who want to know the exact dimensions of a Sabertooth 2x32A.
    Here are some pictures:
    IMG_20181109_102923.jpg

    IMG_20181109_103139.jpg

    IMG_20181109_103542.jpg

    IMG_20181109_103615.jpg

    IMG_20181109_103652.jpg
    Last edited: Nov 10, 2018
  6. Brie69

    Brie69 Member

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  7. MarkusB

    MarkusB Active Member Gold Contributor

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    Good morning, @Brie69,

    now that you have everything you need, I guess this will become a busy building weekend. :thumbs

    The SMC3 setup instructions you mentioned in your last post is great. Just follow the steps carefully.

    And note that with wheelchair motors you will probably need a smaller Kp value than recommended in this thread.
    You will recognize it when you get jerky motor movements. I had this problem, and another member had it as well, see here: https://www.xsimulator.net/community/threads/first-build-no-joy.12644/#post-165779
    See also @BlazinH‘s explanation below this post.

    Oh, one more thing: Don‘t forget to connect the voltage clamp resistors. You should have 2 of them in your Sabertooth package. You can find the wiring further below in the SMC3 tutorial.

    Good luck for continuing your build,
    Markus
  8. MarkusB

    MarkusB Active Member Gold Contributor

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    Right now I noticed that you mentioned Sabertooth 2x35. I hope you actually meant 2x32 (and not something else like 2x25, which does also exist and currently causes lots of trouble for another forum member, because it is not supported by SMC3.)
    • Like Like x 1
    Last edited: Nov 10, 2018
  9. Brie69

    Brie69 Member

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    Sorry, fixed it...it's a 2x32 like in the photo's I posted.
    • Like Like x 1
  10. Brie69

    Brie69 Member

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    Thanks for this positive feedback @MarkusB . At first I started with the batteries that were with the wheelchair when I bought it. Yes, indeed I had bought a whole wheelchair for 75 euros.
    This weekend I will first determine the balance point of the top of the simulator and make a working drawing so that the base, the bottom of the simulator, is well thought out first. I myself had devised to use the heavy weight of the battery pack to keep the base small.
    But first some drawing and calculation, not to mention SimCal.

    Cheers,
    Bryan
    • Like Like x 1
  11. Brie69

    Brie69 Member

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    Working on the new base

    base1.jpg

    base2.jpg
  12. GTexas

    GTexas New Member

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    In case you are still looking for a 24V power supply, I used 2 x 12 V server power supplies to power my wheelchair motors. There are several used ones available on Ebay and they have sufficient capacity to power wheel chair motors under load. Just make sure to float one of the supplies if you connect them in series.

  13. Brie69

    Brie69 Member

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    Thanks for that @GTexas I'll will order two of those later on.
  14. Brie69

    Brie69 Member

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    Working on the bracket

    before.jpg after.jpg
    moer.jpg
  15. Brie69

    Brie69 Member

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  16. Brie69

    Brie69 Member

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    Working on the top cover

    IMG_20190103_181947565.jpg

    IMG_20190103_191319021.jpg

    IMG_20190103_191524258.jpg

    Attached Files:

    • Like Like x 2
  17. Brie69

    Brie69 Member

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    sat7.jpg

    sat6.jpg
    • Like Like x 3
  18. piloulou

    piloulou New Member

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    magnifique vous avez fais du très bon travail bon courage
    • Like Like x 1
  19. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    • Like Like x 1
  20. KONIU

    KONIU Member

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    I'm almost finish my 2dof simulator, with the same connection points like in this project. But pls give me only one advice. Without electric source when motors not run it is no possible use seat (for example playing in no motions games) because motors turning and the seat moving with no any control. It is any way to block motors? How this work in normal use? You are using yours sjmulator only for racing? Pls give me some advices because if there no any way to block seat tomorow I will be mounting same kind of bar for securing seat when no playing in no motion games.