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Finished - compact 3 DOF with traction loss

Discussion in 'DIY Motion Simulator Projects' started by Robdog, Jan 12, 2017.

  1. Robdog

    Robdog Member

    Joined:
    Jul 12, 2015
    Messages:
    43
    Location:
    Newcastle, Australia
    Balance:
    97Coins
    Ratings:
    +53 / 0 / -0
    My Motion Simulator:
    3DOF, JRK
    I have a made a change to the mounting of the hall sensor. Previously it was mounted on the motor shaft but I was getting the odd spike in the signal which was annoying. I think the spike was caused by backlash in the gears and a little slop in the linkage all magnified by the length of the lever.

    The sensor now measures the position of the seat rather than the motor position and has completely eliminated those spikes. As a result I have been able to increase the sensitivity of the axis and am really happy with it, even if it looks a little weird.

    IMG_0454.JPG
    • Like Like x 5
  2. mirkobastianini

    mirkobastianini Active Member

    Joined:
    Jan 23, 2017
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    Occupation:
    informatic
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    italy
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    1,175Coins
    Ratings:
    +75 / 2 / -0
    My Motion Simulator:
    2DOF
    @Robdog , sorry for my noob question... if I understand well your traction loss doesn't have a pivot point on front? Only one motor connected on back, right?
  3. Robdog

    Robdog Member

    Joined:
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    My Motion Simulator:
    3DOF, JRK
    There is a lazy susan bearing at the front under the pedals, the bearing is as wide as the frame so the frame does not rock from side to side. The movement is provided by the motor at the back.
    • Like Like x 1
  4. Remishka

    Remishka Member

    Joined:
    Jan 15, 2017
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    Occupation:
    Musician, Woodturner
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    France
    Balance:
    - 55Coins
    Ratings:
    +15 / 0 / -0
    My Motion Simulator:
    3DOF, DC motor, Arduino
    Hello,
    You beast looks awesome congratulations ;) .
    I do have a question tho, what kind of reductors are those ?.
    Good day to you.
  5. Titobial

    Titobial Member

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    Feb 28, 2017
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    Location:
    Zaragoza
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    Ratings:
    +10 / 0 / -0
    My Motion Simulator:
    2DOF, AC motor, Arduino, Motion platform
    Very good work and design! Congratulations! regards...
  6. Slider

    Slider Active Member

    Joined:
    Jul 28, 2014
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    Occupation:
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    Brisbane
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    Ratings:
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    My Motion Simulator:
    2DOF, JRK
    Really like your build, well done. I really want heave and traction loss but have to iron out other issues first.
  7. zgseat

    zgseat New Member

    Joined:
    Aug 11, 2016
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    Occupation:
    Engineer
    Location:
    Shanghai, China
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    Ratings:
    +3 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    your rig is cool,like the compact design。
    • Friendly Friendly x 1
  8. Javo5

    Javo5 Active Member

    Joined:
    Oct 10, 2014
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    Location:
    Buenos Aires, Argentina
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    Ratings:
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    My Motion Simulator:
    2DOF, DC motor, Arduino
    Good design! I also have a compact seat mover, but only 2dof
  9. Robdog

    Robdog Member

    Joined:
    Jul 12, 2015
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    Location:
    Newcastle, Australia
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    My Motion Simulator:
    3DOF, JRK
    Thanks. It is worth the effort of adding a heave axis as the sim really seems to come alive when it is added. My traction loss isn't currently working with the latest revision of Simtools and I am living without it but I wouldn't put up with losing heave.
    • Informative Informative x 2
    • Agree Agree x 1
  10. FrankXX

    FrankXX New Member

    Joined:
    Dec 30, 2018
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    Balance:
    6Coins
    Ratings:
    +2 / 0 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, AC motor, SCN5, SCN6, Arduino, JRK
    I was curious about how the two motors in the back worked,I couldn't see them.