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DIY 3DOF two-seater

Discussion in 'DIY Motion Simulator Projects' started by Aerosmith, May 30, 2024.

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  1. ScottD

    ScottD New Member

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    Fantastic! I appreciate this view of it! I am designing a frame very similar to yours. Are you using a U-joint for a pivot? May I ask what the length of your ball screws are and about how much travel you get/need? I was thinking about actuators that are much shorter than what it looks like you have but I have not yet figured out the travels.

    Thank you very much,

    Scott
    ScottD, Jan 9, 2025 at 15:03
    #21
  2. Aerosmith

    Aerosmith Active Member

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    My Motion Simulator:
    3DOF, AC motor
    Here is a better picture of the connections of the actuators to the rig. Although there are bearings with crossing axes it's not really an U-joint.
    Actuator-hinge.jpg
    There has to be a kind of a "pendulum arm" to compensate the horizontal distance of the pivot points when one actuator moves upward and the other downward.
    Although it works quite well I wouldn't take this build as model. We built it before joining this forum. With todays knowledge I'd probably design it more like @peter stolmeier 's platform.
    We found out that +/- 150mm stroke is enough. But make sure to have 10..20mm pitch and not the most common 5mm.
    • Like Like x 1
    Aerosmith, Jan 9, 2025 at 15:56
    #22
  3. ScottD

    ScottD New Member

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    That's great info. I will look at Peter's build as well. I am thinking of using a u joint near the CG as the pivot and then u joints at the actuator connection to the sim base. That would give me 2 DOF. Thanks for your information very helpful.

    Scott
    ScottD, Jan 9, 2025 at 20:07
    #23
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