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G-Seat vs 6Dof Motion platform, what feels best? with VR or without it

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by norsk22771, Jan 30, 2017.

  1. norsk22771

    norsk22771 New Member

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    Hello. Im wondering if anyone have experienced with the G-Seat or Motion platform in VR or without VR?

    Im wondering what is best for accuracy and the mest feel of motion you get, the best immersion? What is best? a G-Seat or a 6Dof Motion Platform? It is going to get used for Flight Simulators

    My budget is maximum 4500 dollars. i prefer bellow 4k dollars
    Last edited: Jan 30, 2017
  2. Ads Master

    Ads Master

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  3. Blame73

    Blame73 Well-Known Member

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    My Motion Simulator:
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    I don't have a 6DOF nor a G-Seat, but asking this in a motion simulator forum... :D
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    @Avenga76 uses a G-seat with his traction loss rig and @SeatTime uses a partial G-seat like approach with his 6DOF, so perhaps they can comment.
  5. SeatTime

    SeatTime Well-Known Member

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    Unfortunately I cannot give a simple which is better answer as they both bring different things to the simulation/immersion table. If you have the room and can afford to - both. VR of course, would have to drag me back screaming to a flat screen :).
    • Informative Informative x 1
  6. Stealthelius

    Stealthelius Member

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    My Motion Simulator:
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    6DOF have a real feel than G-Seat for my point of view...
  7. Pit

    Pit - - - - - - - - - - - - - - - - Gold Contributor

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    My Motion Simulator:
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    Maybe you are willing to share your diy projects from where you got your point of view?
    • Agree Agree x 2
  8. Avenga76

    Avenga76 Well-Known Member

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    My Motion Simulator:
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    I have a G Seat and a 3DOF and they are quite different types of motion so it depends what you want and in your case, what types of planes you are flying.

    In flight sims the full motion is used more for the pitch/roll angles and the G-Seat is good for feeling G Forces.

    My 3DOF is better for slow planes because you can feel the bank and pitch angle. But if I am flying a fast jet then the G Seat is better because it feels more like the G Force you experience.
    • Informative Informative x 2
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  9. SilentChill

    SilentChill Problem Maker

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    He hasn't one lol its just a stab in the dark ;)
    • Agree Agree x 1
  10. norsk22771

    norsk22771 New Member

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    How diffrent does Linear actuators vs push rods feels like for motion platform? is it better with linear actuator or push rod method?
  11. SilentChill

    SilentChill Problem Maker

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    Best thing about actuators IMO is there is no slop at all its directly driven you feel everything. I think with some really good expensive gearboxes you could achieve the same
  12. norsk22771

    norsk22771 New Member

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    Thanks for repply :)
    I was wondering what motor is best for use with a linear actuator? im thinking about DIY actuator made of carbon and steel/metal with 800mm length of travel. Carbon fiber actuator like what @SeatTime did

    My budget is maxiumum 4000 but i want to try to stick bellow 3500 USD.
    Should i go the Brushless motor, DC or AC route?

    The frame of the motion platform will either be in carbon fiber or lightweight metal/alloy.

    Best regards

    Here is a animation of the actuator and the idea i have with anti rolling for the ball screw
    https://i.gyazo.com/9589cb0cac559baf64b7988386df88dc.mp4

    and a picture of it.

    [​IMG]
    Last edited: Feb 10, 2017
  13. SilentChill

    SilentChill Problem Maker

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    Personally I would probably go with 24v DC motors if i were to build again, as fast RPM you could find some 3000 or above:)
  14. cfischer

    cfischer Active Member Gold Contributor

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    I haven't built any actuators yet so take this with a grain of salt. I would reassess that very small diameter looking yellow rod that you're using to hold the ball nut from twisting. Any flex on that rod and you loose fidelity. I know ball screws are very efficient so there won't be a huge moment from them but it looks like that rod would be able to deflect pretty easy...

    Food for thought.
    • Agree Agree x 1
  15. norsk22771

    norsk22771 New Member

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    @SilentChill Okay thanks. Does it work with 4500RPM? or is that too much?

    What other considerations do i need to take care of in linear actuator? like limit switches? do they cut the power to the motor? how do they work? Do i need any potometers?


    @cfischer I was thinking about the bending effect soo i taught about maybe using steel and have the 2 steel rods to keep the bending effect to a minimum (at 0% if possible)

    Have anyone experienced with that method of using steel cyliders for anti-rotation/anti-twisting
    Last edited: Feb 11, 2017
  16. cfischer

    cfischer Active Member Gold Contributor

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    What material are you going to use for the 4 main rods you're using? Why not use them all as anti-rotation. At least one.
  17. norsk22771

    norsk22771 New Member

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    Carbon fiber will be the 4 main rods, and there will be a big carbon fiber tube that will cover everything execpt for the motor. The 4 main rods are for structure integrity

    Good idea :) I will get back to the drawning board and see what solution i can come up with.
  18. SilentChill

    SilentChill Problem Maker

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    Yes 4500rpm would be perfect with 5mm ballscrew ;)
  19. norsk22771

    norsk22771 New Member

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    Another question: Should i increase the diameter of the ballscrew? since its soo thin? just thinking soo i dont break anything and it colapses. The weight of the whole rig will be bellow 120kg i belive
  20. SilentChill

    SilentChill Problem Maker

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    No not if it's all put together properly, each axis supports each other they are solid once all connected up to the platform and base
  21. ericRacer

    ericRacer You get old because you stop playing ! Gold Contributor

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    @norsk22771 G-seat you will never feel motion sickness , 6dof is very good for big plane because of slow motion but not sure for fighter !