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Sams 6DOF project

Discussion in 'DIY Motion Simulator Projects' started by sam poole, Dec 7, 2017.

  1. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    I am an experienced car mechanic but my electronics and are a bit patchy and have quite a limited knowledge of programming but im here to learn and hopefully someone can help if i get stuck

    please forgive the poor quality photos this is just a collection of parts really i thought id use an old pc case to mount the motors etc in and will be reinforcing brackets to the drive shaft when that is mounted in the correct place 20171207_125103[1].jpg 20171207_125209[1].jpg 20171207_125526[1].jpg 20171207_125750[1].jpg
    Thanks for looking and any advice or criticism is welcome.

    Attached Files:

    • Like Like x 1
    Last edited: Jan 5, 2018
  2. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator SimTools 2.0 Beta Tester

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    My Motion Simulator:
    3DOF, DC motor, JRK
    A creative approach but I am skeptical that a PC case has enough rigidity, I suspect it needs an additional frame.
  3. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    Hi noorbeast thanks for your response i totally agree with what you say so i am planning its to use the wiper mechanism and brackets to create in internal frame connected to the drive shaft

    Attached Files:

  4. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator SimTools 2.0 Beta Tester

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    My Motion Simulator:
    3DOF, DC motor, JRK
    The base also has to be rigid enough to support the universal joint post and the mass of the seat and user when moving. Any frame movement will reduce the motion fidelity.
  5. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    Thanks for that my idea at the moment is to mount the drive shaft to a scaffold base plate underneath the case and the 3 bars from each motor bracket to the base plate stub and then secure the plate to something like a bit of kitchen work surface off cut but i am trying to be resourceful as its cost less than £100 minus the seat and wheel so i hope that will be ridged enough i imagine it will be a bit trial and error.

    Do you recommend use of a spring? im concerned if it elevates it might brake the motor gearing
  6. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator SimTools 2.0 Beta Tester

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    My Motion Simulator:
    3DOF, DC motor, JRK
    A spring is not generally recommended unless it is perfectly tailored to a rig, as you can have oscillations or motors fighting against the spring when extended.

    That said I do have an adjustable spring assist heave knee on my compact 3DOF rig.

    When using wiper motors it is better to give them more design leverage instead, as they are not that powerful.

    Normally you also have top ground isolate wiper motors: https://www.xsimulator.net/community/faq/wiper-motor-mandatory-ground-isolation.25/
  7. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    fantastic build you have by the way looks really professional do you use any spring in that?
  8. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    very useful information thank you again i also remember reading something about flyback diodes is this something you know anything about?
  9. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    I dont know if anyone can help with this i have some continuity on my moto sheild but only on this one with the live terminal as shown in pic is this normal? none of the others have any and was like this before any soldering any help would be appreciated thanks

    Attached Files:

  10. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    Finally i have it working i have a video but too large but here is a link

    Attached Files:

    • Like Like x 3
  11. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    some photos of the internals i deleted these but managed to salvage some thumbs

    Attached Files:

    • Like Like x 2
  12. mprofitt

    mprofitt New Member

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    You don't need a seat belt but I am genuinely impressed. Well done. Nice contribution.
  13. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    Thanks mprofitt that's very true I am being careful as that was the 2nd test so is on fairly low settings in simtools think I may put some boot struts on the rear to take some of the weight will update when I do
  14. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    • Like Like x 2
  15. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    This was a bad idea as I suspected it is far too top heavy feels like sitting on an unbalanced washing machine so going with the Stewart platform style looks like I'm going to need welding that I was trying so hard to avoid
  16. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    20180508_133307.jpg
    • Like Like x 1
  17. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    20180508_133438.jpg
    • Like Like x 1
  18. sam poole

    sam poole New Member Gold Contributor

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    3DOF, DC motor, Arduino, Motion platform, 4DOF
    Some photos of how I mounted the hall sensors using lego

    Attached Files:

    • Winner Winner x 1
    • Creative Creative x 1
  19. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF

    after 1st basic tuning
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    • Winner Winner x 1
  20. sam poole

    sam poole New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    Just realised last night the surge is the wrong direction I knew something felt odd

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