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6DoF sim rig

Discussion in 'DIY Motion Simulator Projects' started by Geoff M, Sep 8, 2025 at 12:33.

  1. Geoff M

    Geoff M New Member

    Joined:
    Aug 18, 2025
    Messages:
    1
    Balance:
    16Coins
    Ratings:
    +0 / 0 / -0
    My Motion Simulator:
    6DOF
    G'day folks! Just decided to have a crack at building a 6DoF sim rig. I'm making a base and bolting an existing stationary sim rig to it. I have no experience, but have a mechanical background and roughly understand the concept. I'm hoping to fill in the blanks with the brains trust here as my weakness is programming the 3 arduino R3's and getting it all to talk nicely with Sim Tools. I still have a lot to do, like 3D printing mounts for the rotary encoder boards, and making final servo arms. I'm using 6x 24VDC 500W ebike motors with 10:1 inbuilt gearboxes, being driven by 3x 100A H bridge drivers controlled by 3x arduino R3's and AS5600 rotary encoders for positioning.
    I Plan on supporting the "cradle" on 3x 700N gas springs to reduce the static load on the motors. (Don't look too closely at the welds. If ya squint, it's mint!).

    If anyone has any tips, I'd be glad to hear them. See pics below...
    2025-08-30 09_31_28-Sim Rig.xlsx - Excel.png 1000023442.jpg 1000023443.jpg 1000023446.jpg
    Geoff M, Sep 8, 2025 at 12:33
    #1
  2. Gadget999

    Gadget999 Well-Known Member

    Joined:
    Dec 27, 2015
    Messages:
    1,970
    Location:
    London
    Balance:
    12,029Coins
    Ratings:
    +486 / 10 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino, 6DOF
    I looked at these gear motors a while back

    the gearbox ratio was about 9:1 which is not that much of a reduction

    a ratio of 30:1 to 50:1 would be a better match

    they are a neat package, hope they work for you
    Gadget999, Sep 8, 2025 at 17:58
    #2