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Showroom 3070W 6DOF Seat Mover (WIP Surge_Sway table)

Discussion in 'DIY Motion Simulator Projects' started by Pit, Mar 5, 2014.

  1. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    My Motion Simulator:
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    Nothing like ripping your sim apart, sorting through and modify its carcass and then end up with something even better once it is rebuilt!

    I am looking forward to following your surge upgrade @Pit.
    • Friendly Friendly x 1
    Last edited: Aug 19, 2015
  2. Pit

    Pit - - - - - - - - - - - - - - - - Staff Member Moderator Gold Contributor

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    My Motion Simulator:
    DC motor, Arduino, 6DOF
    Very early stage - really alpha but already I'll show you an impression how it will work (hopefully - lol)
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  3. value1

    value1 Nerd Staff Member Moderator SimAxe Beta Tester SimTools Developer Gold Contributor

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    My Motion Simulator:
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    OMG! This will be awesom!!! And as usual in the very high and appealing quality of Pit-built!
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  4. speedy

    speedy Well-Known Member

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    My Motion Simulator:
    3DOF, AC motor, Arduino, Motion platform
    Wooooooooooow ... LLLLLLLLLLove it .
    1.gif

    Idea :nerd ... please put a scale under your feet plus a similar total weight to measure how much force do you need from the pinion to push/stop/reverse this beauty .


    Actually ... I couldn't calculate it from the given previous motor specification
    " radial torque ???? "
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    Last edited: Aug 21, 2015
  5. Pit

    Pit - - - - - - - - - - - - - - - - Staff Member Moderator Gold Contributor

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    @speedy thank you very much.
    Concerning the radial torque I don't have any other information as already given.
    Regarding the weight or force to push the sway table I can do it with one finger... :) I would compare it with a shopping cart. Furthermore there is "no" noticeable rolling resistance. NTL I am afraid that the motors will be the limited factor despite of the power of 260W / layer. Anyway I like trial and error...

    PS: the specs say 130W continuous but 6.9A max = 165.6W (24V) x 2 = 331.2W peak / layer. IMO should be enough.
    Last edited: Aug 21, 2015
  6. speedy

    speedy Well-Known Member

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    My Motion Simulator:
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    please test and try and consider the fast side to side movements will require more than one finger :) .

  7. Pit

    Pit - - - - - - - - - - - - - - - - Staff Member Moderator Gold Contributor

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    hehe - of course not if the rest of the rig stands on the table . The one finger test was only an example how much force is needed to push the empty tables.
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    Last edited: Aug 21, 2015
  8. Pit

    Pit - - - - - - - - - - - - - - - - Staff Member Moderator Gold Contributor

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    My Motion Simulator:
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    A newer model - IMHO I should achieve the estimated speed without big issues. The professional rig seems to be not as fast as I imagined.
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  9. value1

    value1 Nerd Staff Member Moderator SimAxe Beta Tester SimTools Developer Gold Contributor

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    My Motion Simulator:
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    P = ΔE/Δt = ½mv²/t
    with m = 150 kg
    v = 1 m/s
    t = 1 s

    P = 75 W
    add the friction and the efficiency factor and 150 W should be enough.
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  10. Pit

    Pit - - - - - - - - - - - - - - - - Staff Member Moderator Gold Contributor

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    Wow, @value1 your are a great guy, I am highly pleased:cheers 1m/s is really fast, the table has a max. speed of ~36cm/s. It is very important, how the weighty mass will be accelerated - if it would be too sluggish all effort would not be worth the investment of time and money.
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  11. SeatTime

    SeatTime Well-Known Member

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    My Motion Simulator:
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    Mine used a single 200W motor - it moved quick enough - there was also a bit of weight in it at the end with a heave module built into the seat (although I don't think it was ever as heavy as yours). Notice how it is moving forward for braking, as this felt the best with no working washout.

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  12. Pit

    Pit - - - - - - - - - - - - - - - - Staff Member Moderator Gold Contributor

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    My Motion Simulator:
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    Nice build! ay @yobuddy promised, we will fiddle out the washout filter. How far is the surge table moving? 50cm (20 inches)?
  13. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    My Motion Simulator:
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    I understand what you're saying but just a clarification
    It's not really about speed... but acceleration.
    - Uniform speed (m/s) won't give you any feelings
    - You have to aim good acceleration (m/s²) because this will give you the gForces​

    I stay tuned to your post and progress :)
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  14. Pit

    Pit - - - - - - - - - - - - - - - - Staff Member Moderator Gold Contributor

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  15. speedy

    speedy Well-Known Member

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    You have the touch of a SURGEON @value1 ... :thumbs

    ============================================================================
    So ...
    P = ΔE/Δt = ½mv²/t
    where :
    m = kg
    v = m/s
    t = s
    P = W
    https://www.physicsforums.com/threads/power-problem-pushing-a-train.373588/
    perfect :thumbs
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  16. RufusDufus

    RufusDufus Well-Known Member

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    Really nice build @Pit, can't wait to see it in action!
  17. Pit

    Pit - - - - - - - - - - - - - - - - Staff Member Moderator Gold Contributor

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    Thank you mate :)

    Progress today: after 1 million not working ideas and tinkering I think I got it - the way how the motors will drive the sway table (one motor at the front and one at the back):
    20150823_104415.jpg
    20150823_104306.jpg
    20150823_104340.jpg
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  18. SeatTime

    SeatTime Well-Known Member

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    A think a bit over 300mm travel, but I'm not home at the moment to be sure (in Japan :)).
  19. Pit

    Pit - - - - - - - - - - - - - - - - Staff Member Moderator Gold Contributor

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    My Motion Simulator:
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    Electronic parts are up and running, all successfully tested. The Pololu VNH5019 are high quality samples, the chips are totally flush to each other, nothing to compare to all MMs I ever had.
    20150824_170956.jpg
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  20. Pit

    Pit - - - - - - - - - - - - - - - - Staff Member Moderator Gold Contributor

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    My Motion Simulator:
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    The first layer is "ready", only the PSUs have to be reconnected on the layer and the second motor, too (to be functional), so be patient this evening I will present you the first moves :p -
    20150825_185743.jpg
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    Last edited: Aug 25, 2015