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3dof Kart Sim

Discussion in 'DIY Motion Simulator Projects' started by dave r, Oct 9, 2014.

  1. dave r

    dave r New Member SimAxe Beta Tester Gold Contributor

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    My Motion Simulator:
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    OK here we go my idea is to build a sim rig 3dof based around the dimensions of my sons 2 stroke kart. So seat mover+ traction loss, I have ordered 3jrk's psu's pots and motors.
    Can anyone point me in the direction of a good traction loss thread. My main questions are how much angular rotation do I need and what pivot points. I am assuming at the moment that the bearing for rotation (12" lazy susan) should be on the centre line of the front axle of the kart and the length of the rotational radius should equal the wheelbase, so along the back axle. Any advise greatly appreciated.
    thanks
    dave r, Oct 9, 2014
    #1
  2. bsft

    bsft

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    bsft, Oct 9, 2014
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  3. Nick Moxley

    Nick Moxley Well-Known Member

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    My Motion Simulator:
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    Seattime did a Chain setup, i Choose a lever setup, Pending what your working with and the space you have, One way might be easier than the other. Explore your option's before committing to a particular design.
    Nick Moxley, Oct 9, 2014
    #3
  4. dave r

    dave r New Member SimAxe Beta Tester Gold Contributor

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    My Motion Simulator:
    3DOF, JRK
    So if we assume I'm going with a lever how many degrees about the centre line is going to be optimum, this is going to dictate how far I mount the lever away from the point of rotation. I'm kind of hoping someone would say 5deg not enough to notice 10deg OK and any more your going to struggle with the reaction times and moments of inertia etc. What movement are you getting from your lever setup and how big is your turning radius. Help and info greatly appreciated by the way.
    dave r, Oct 9, 2014
    #4
  5. dave r

    dave r New Member SimAxe Beta Tester Gold Contributor

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    3DOF, JRK
    Do you think its a good idea to move the seat relative to the frame or were you thinking of moving the seat and frame together, I've read plenty of your threads and thought that moving the seat was probably the best way to go for starters
    dave r, Oct 9, 2014
    #5
  6. dave r

    dave r New Member SimAxe Beta Tester Gold Contributor

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    OK ive just read through Nick Moxleys traction loss build and Nick's talking about having 4" of movement either side of the ctr line. Looking at the pictures of his build and the platform that its moving over I would assume that the 4" is the distance that the caster wheels are moving behind his seat. Its very encouraging to hear that such a small lateral movement can generate such a great experience.
    dave r, Oct 9, 2014
    #6
  7. Nick Moxley

    Nick Moxley Well-Known Member

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, JRK
    4" is HUGE to the inner ear, I couldn't imagine much more unless your just goin for the extreme of extremes (cough cough robbie)

    Dont forget about Mechanical Frame stops.
    • Funny Funny x 1
    Nick Moxley, Oct 10, 2014
    #7
  8. bsft

    bsft

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    you could go a full frame move easy, just need to mount a pivot under the best point of balance, maybe make a frame up with motors at shoulders or down near the feet.
    Piece of cake.
    bsft, Oct 10, 2014
    #8