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Couple of I'm sure basic NewB questions

Discussion in 'New users start here - FAQ' started by Renowest48, Nov 2, 2018.

  1. Renowest48

    Renowest48 New Member

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    My Motion Simulator:
    DC motor
    I have some questions about the what I believe would be a 4DOF with traction loss sim.

    I am not computer savvy by any means, so although I have searched and followed many builds I am still in the dark on much of the process. I am a fabricator and have built many race cars and other things so my strong point will be the rig.

    My idea is to build a 5/8 scale dirt late model and place actuators where the shocks would be to have a scale movement. This will include the chassis having a four link as well as front suspension mount points and arms. There will be tires on it but the contact points to the concrete will be fixed. The rear axle tube will be affixed to a roller plate for traction loss. My thought process is to get immersion with the chassis cockpit as well as similar hike and movement of the car. I probably won't be doing VR until some more advancements are made do to my vision and sensitivity to light.

    So onto my question's
    Who if anyone sells or could program a controller to run the 4dof as well as the TL. I am not a programmer and this is the part that scares me. Is there anyone that offers a lower priced controller to run this type of setup for iracing where all it would need is tuning to get the rates correct? Also what would be the recommendation for actuators that have eylets or heims on both ends? I want the placement to be where a shock would normally best as I want to wrap them in decals to appear as shocks.

    Any help or suggestions would be greatly appreciated.
    Renowest48, Nov 2, 2018
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    It would be helpful if you add a sketch of what you have in mind, as I am not sure how traction loss is to be implemented from your description.

    In the meantime just some thoughts for you to consider.

    The first is that predominately motion simulation is all about tricking the brain, not necessarily recreating actual forces with 100% accuracy, and in many cases it is impossible to create the actual 5-10 Gs of say and F1 or fighter jet, except with a centrifuge.

    So given the first point perhaps consider further what you want from your motion sim, as adding things like whishbone suspension add to mass, which is not good, and likely will negatively impact on motion simulation performance. I suspect something like a D-Box style rig with traction loss may be close to what you have in mind: https://www.xsimulator.net/community/threads/diy-d-box-style-for-vr-3-dof.11524/

    As a fabricator you may also be interested in building your own actuators, and there are many member examples you can examine.

    There is plenty of code/hardware options available: https://www.xsimulator.net/community/faq/arduino-code-for-use-with-various-hardware-and-simtools.31/
    noorbeast, Nov 2, 2018
    #2
  3. SeatTime

    SeatTime Well-Known Member

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    My Motion Simulator:
    AC motor, Motion platform
    Does it need to look like it is moving from the outside for any specific reason? Software won't be the issue/major cost for your current concept.
    SeatTime, Nov 2, 2018
    #3
  4. Renowest48

    Renowest48 New Member

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    My Motion Simulator:
    DC motor
    I would like to do some sort of a scale body on it, and to have it moving in scale from the outside is my though process. I think it would look great sitting in the man cave. After further reading it looks like this may only be 2DOF using 4 actuators? My idea is to build something like this mini late model, or a sprint car setup. I don't want the sim to just pivot on a u-joint in the middle as from a scale side the middle also rises and falls with the suspension. The dirt cars have a lot of lift and drop in and out of the corners and I would like to replicate that feeling.

    Attached Files:

    Renowest48, Nov 5, 2018
    #4
  5. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
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    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    145,142Coins
    Ratings:
    +10,780 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    I guess the trade off is how you want it to look Vs motion performance and cost.

    Adding mass to a motion sim is much like it is with a race car, it impacts on performance and cost, and you don't do it unless you have to.

    For what you want you would scale it differently than this video, and instead place the actuators closer to where wheels would be, but the video does give an idea of what a 3DOF Dbox style rig would look like with traction loss.

    noorbeast, Nov 5, 2018
    #5