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Question want to build a 6DOF for everything with Valve Index

Discussion in 'DIY Motion Simulator Projects' started by sci666, Mar 18, 2021.

  1. sci666

    sci666 New Member

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    Hi There, i just baught my Valve index and its so great to game with it !
    I am german and live in the Cologne Area and iam an IT Guy with some DIY working skills

    so the next step is to build a Motion platform without the monitor stand nonsense :-D

    2 DOF is a bit to primitive for me, and also 3DOF has no side/forward/backward movements ...so everything whats left is a 6DOF.

    But! ... i dont want spend much money ! iam not an sim enthusiast ! so its for some racing games or space games like Star Wars Squadrons and so on. fun and the feeling in VR is in the first place.

    So goal is: minumum cost with maximum fun :) i dont want to build an engineering masterpiece and it should be also relativily small, dont want to build a giant rig, my wife will kill me !!!! :-D

    i can solder, i can weld, i have Metal and also a 3d Printer, a Logitech Steering Wheel and a Thrustmaster HOTAS, i have an old car seat and a strong VR PC :)

    so just burn some money ... hopefully less :-D

    first question is, what is better? using Motors or actuators ? i think motors are the cheaper value right ?

    are 6 cheap 24V DC wiper motors strong enough ? what wattage ? i mean my weight is 70 kg so iam a skinny person :-D
    + Seat and stuff maybe 100/120 kg ?!

    What does i also need, arduino for controlling all of it, 3x sabertooth thingies ? potentiometers and some more bits and pieces.

    Many thanks in advance for your hints and tips !
  2. Ads Master

    Ads Master

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  3. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    Cheap for a 6DOF starts running into the thousands of dollars, what is your actual budget?

    No 6 cheap 24V DC wiper motors are not strong enough.

    Use the Enhanced by Google search box on the Recent page to search for 6DOF, then filter by date to find the most recent projects. While powerful DC motors can and have been used, you will find that many have now moved to using servos, either with DIY actuators or gearboxes.

    Actuators are mechanically more efficient than gearboxes, but can be more complex if you are building them.
  4. sci666

    sci666 New Member

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    mh really ? i mean the 6dof simukit set contains six 24v 440watt motors ... and this complete DIY set was sold for about 2400 Euros, so it must be enough (?) and all of this stuff is brand new ...1 motor alone 200 Euros ....i dont need new stuff ...iam a happy recycler :) so why not used stuff ? it costs nearly nothing. so iam not talking about money ... it costs what it costs but i believe i can beat 2400 euros by far with searching for good prices and used deals ! and the most of the frame i can build by myself

    you can always build things over the top for several thousands of euros/dollars, but thats not the plan as i said :)

    i will do a bit more research as you said, also with servo motors :)
  5. sci666

    sci666 New Member

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  6. sci666

    sci666 New Member

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    ah forget it i saw tha case measurements ...seems to be really small :-D so no deal .... ;.D
  7. Bastiuscha

    Bastiuscha Active Member Gold Contributor

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    God, does your first post excite me badly. So really typical: I want the best, but it should cost nothing. As if other people build DIY's here because they have boredom. Let me tell you something... a "primitive" 2DOF is a hundred times better than a half-hearted shit 6DOF build. Sorry for my harsh words, but you need to hear this.

    If you want to have a 6DOF, you have to count with space. Such a seat needs a certain foot width, to absorb the lateral forces. Unless you bolt your Seat into the floor. As Noorbeast said, google different 6DOF projects, then you know what awaits you, technically and dimensionally . With 2500€ you can build something. If you order a lot from Ali Express, you can save a lot money.

    My recommendation: don't save to much on motors. In the end you buy twice. Sabertooth are already a good approach. Because i tell you...it is simply awesome... once you have a seat, you will never want to go back without one. So, do not be angry with me for my words, I will be happy to help you as far as you know what you like to build.
    Last edited by a moderator: Mar 31, 2021
  8. MarkusB

    MarkusB Active Member Gold Contributor

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    Hi @sci666,

    if you are looking for strong and cheap DC motors, I recommend second hand wheelchair motors, which are frequently offered on ebay. With a bit of luck you get two of them for about 150 €. Maybe you need some patience until you have 6 of them.

    Besides, 6 DOF is not the only way to go. G seats / G systems are an interesting alternative, and you can find a lot of such builds in this forum.
    There are many different approaches, and they can deliver really good results in performance, price, and needed space (where the last parameter is usually directly related to the Woman Acceptance Factor).
    • Agree Agree x 2
  9. SeatTime

    SeatTime Well-Known Member

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    My Motion Simulator:
    AC motor, Arduino, Motion platform, 6DOF
    If your not an enthusiast, I recommend you at first build a 2DOF, it will demonstrate what motion simulation is all about without investing too much.
    • Agree Agree x 2
  10. Zed

    Zed VR Simming w/Reverb Gold Contributor

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    My Motion Simulator:
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    Just to comment, 2 and 3 DOF rigs don’t sacrifice surge and sway. They just simulate it a bit more crudely than a 6 DOF can. You still get motion. If I come off throttle, my 2 DOF seat tilts forward which is actually very convincing as deceleration. Similar for sway or traction loss. It tilts me over but just a little.

    In VR, you only need to hint at the motion. The brain is already working to smooth over any inconsistencies in the view vs. what your body is feeling. That’s why people in VR can fall down if they are standing and even fall out of chairs. A 6 DOF is still a compromise anyway. There’s various motions those can’t simulate either.

    That also comes into play for compensation for rig motion. If a 6 DOF lifts you up in the air, your virtual head can poke out through a car or airplane roof. Other motions can also move you outside or around in a cockpit. In VR, motion requirements may be reduced depending on what you are looking for but there are also ways to compensate. VR changes the equation somewhat depending on what you need.

    Not arguing against a 6. I want one myself but am constrained by space and power requirements. Just saying that there are lots of considerations even into what kind of rig you need to build.
    • Agree Agree x 2