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2 DOF Mounting Opinions

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Sam Neall, May 14, 2019.

  1. Sam Neall

    Sam Neall New Member

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    Hey I’m in the process of building a 2 DOF motion platform. I have already made a frame for my racing simulator and was wondering if I should mount a universal joint at the bottom of the seat or put my whole rig on universal joint and build a different base to mount the motors to. Basically should I have only the seat move or the whole thing (the pedals, shifter, seat, and wheel) move? I’ve never felt a motion simulator in real life so I thought I’d ask here. I attached a picture of the rig so far. I’ve just put my office chair on it in the past but I am going to get a different seat, redesign the rig, and mount it. I’m only 16 btw so I can’t afford a pre built motion platform it’s got to be diy haha.

    Attached Files:

  2. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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  3. Scott87

    Scott87 New Member

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    I was tossing and turning on the same thing.

    From what I could see, seat movers can be faster then full platform, for a cheap price.

    However, I went full platform, and just started my drawings tonight.

    I’m building 2 platforms.
    1 for the motors, speakers and uni joint, and the other for my rig.

    I just started a DIY build thread if you want to have a look.

    CB20ECD0-1241-4B22-88E7-621859C44418.jpeg
  4. Sam Neall

    Sam Neall New Member

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    Ok Thanks for the reply. What made you choose the full platform? I’m just building a racing simulator for the time being and have seen other people saying that you don’t need a full platform for car racing. Do you think that is necessarily true?
  5. Scott87

    Scott87 New Member

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    I have no idea if it’s true, I’m very new to this.

    It seems to be hotly debated whether a seat mover or full platform is better for racing.

    I went full platform (now adding traction loss) because I have the space, the ability to use CAD and weld, and it just looks cooler I think haha.
  6. sam poole

    sam poole Active Member

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    looking at this i think the joint needs to be further forward or motor arms further back to balance properly and think trying to minimize weight on platform will be beneficial but i agree you do need a full platform dont like the idea of seatmovers
    Last edited: May 15, 2019
  7. Scott87

    Scott87 New Member

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    I believe the balance point has nothing to do with the motor arms, more where you place the uni.

    That said, that’s not where my motors are necessarily going, as you can see there are no measurements, just my pedal length which is 350mm.

    From what I’ve seen the motors generally go directly above your toes.
    So once I’ve found my balance point, then worked forward to fit the controls and pedals, I’ll know where to put my motors if that makes sense.
  8. Sam Neall

    Sam Neall New Member

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    OK so I’ve decided that I will go with the full frame option. It will be a little bit more construction, but it’ll be a lot more immersive. Thanks for the help!
  9. Jean Paul Andrade

    Jean Paul Andrade New Member

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    hi!, Im also new at this, Im starting my own 3DOF sim, I also choose the full frame because is way much netter in my opinion, you said you added traction loss to your design, thats sway right? so are making a 3DOF as well? what platform did you chose ? I'm having some issues picking between Sway (traction loss) and Yaw movement.
  10. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    My Motion Simulator:
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    Yaw (pivot around a center point) and Traction Loss (pivot near your feet) and Sway (leans away from a corner) are all perceived very differently by the user and are not the same thing.
  11. Jean Paul Andrade

    Jean Paul Andrade New Member

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    Thanks for the answer, yes, know they are two completly different things that is why I haven't decide wich one should I implement in my sim, thanks to you, now I understand a lot more, but there a few things that have been difficult to get, since can't find any information in tje forums, if you please give me a hand:https://www.xsimulator.net/community/threads/3-dof-motion-sumulator-need-advice.13518/