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Kermit Kong's 6DOF Project

Discussion in 'DIY Motion Simulator Projects' started by kermitkong, Jun 15, 2016.

  1. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Hi guys,

    In the meantime I'm also finally arrived the 6DOF / Oculus world.
    I want to show my 6DOF project and appreciate if anybody has some comments about it.

    At first some pictures how the current development is going on. At a later stage I also want to share all my drawings and 3D models to the community.

    6dof.JPG
    • Like Like x 11
    Last edited: Jun 26, 2016
  2. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Today I'd some time to wire the first motor control box. This box includes the power supply and H-bridge-driver PCB for two motors.

    6dof-1.JPG
    6dof-2.JPG

    more is coming soon....
    • Like Like x 4
    Last edited: Jun 26, 2016
  3. ferslash

    ferslash Active Member

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    are you making a new pc for your sim (i saw a motherboard box in the pic) what pc are you making?
  4. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    yep, already made a PC, i7, with MSI Mainboard, 16GB RAM, GTX1080 GFX, Oculus rift VR
    • Like Like x 4
  5. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Hi guys,


    More pictures made...

    At first, the Embedded HALL-Sensor end-switch for the servo lever. Just placed two neodymium magnets on the motor axis and used a HALL-Sensor for the detection.

    IMG_5218 [9508578].JPG
    IMG_5219 [9508579].JPG

    The position Sensor is realized with an endless HALL-Effect Potemtiometer.

    IMG_5221 [9508581].JPG
    IMG_5220 [9508580].JPG

    For safety reason I add some fans (used cheap 12V fan) to guarantee proper airflow to prevent over heating.
    IMG_5222 [9508582].JPG

    theres so much work in front of me, but I guess in few weeks I can ride the monster :)
    IMG_5223 [9508583].JPG
    • Like Like x 9
    Last edited: Jun 26, 2016
  6. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    All the electrical stuff is well assembled and everything is enclosed. So I guess next week I can start with first basic motion tests :)

    Some pictures will follow ...
    • Like Like x 2
  7. GR88

    GR88 Member

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    My Motion Simulator:
    DC motor
    Looking good so far. Looking forward to reading your progress.
    • Like Like x 1
    • Agree Agree x 1
  8. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    wow, so big !, i'm not sure whether this monster fits into my hobby-room :-D

    if everthing runs smoothly, i will start with basic motion setup by next week.

    6dof-3.JPG
    • Like Like x 4
  9. SeatTime

    SeatTime Well-Known Member SimTools 2.0 Beta Tester

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    I have a similar problem, but lucky to have the Wife agree to that :D.

    Sim Room.jpg
    • Like Like x 7
  10. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    ah yeah !, same here, but i have to pay twice, means if i take 500 bugs to make something for my motion seat, also have to spend 500 bugs for her ! Thats the deal man ! :)
    • Funny Funny x 3
  11. wannabeaflyer2

    wannabeaflyer2 Well-Known Member

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    My Motion Simulator:
    2DOF, Arduino, Motion platform, 6DOF
    Hi @kermitkong very nice work like a awful lot of guys here we appreciate the work required to build a 6DOF platform , well done ,
    You knew there would be questions ( were all hungry for Info and not embarrassed to ask LOL ) so can I ask what make of controller Your using for your project and the Motor Spec .. I may be totally wrong but they look like DC permanent Magnet type ?? Sorry if I missed that info if you already mentioned it elsewhere :)
  12. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Hi @wannabeaflyer2

    I'm using the roboclaw 2x60A motor driver (3 boards for 6 motors). The motors are permanent magnet DC 24V /490W motors (50 bugs on eBay each)

    The controller is my own development, it's based on a ATMega1280 CPU

    This board handle up to 6 motors and has a capability to monitor up to 6 HALL-effect end-switches,

    I'm using 24V/100A power supply's in combination with 2x 22000uF/40V capacitors.
    Each power supply drive two motors.
    • Winner Winner x 4
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  13. wannabeaflyer2

    wannabeaflyer2 Well-Known Member

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    My Motion Simulator:
    2DOF, Arduino, Motion platform, 6DOF
    Hi @kermitkong just to say thanks for the Info and great to know that the DC motors can work with the reduction gearbox :) pushing my luck here but what size Reduction gearbox did you select , You Posted that its 25:1 gear ratio but was it a size 25 , 50 , or size 75 gear box ? See i told you we ask a lot of questions LOL :) its all good background information ...best part is your showing the use DC motors with these gearboxes most times they are fitted with AC motors, so your project gets very interesting for a lot of guys, that would prefer DC to AC for the smaller sized Platforms.. just to say for posting this project and the Info
    • Like Like x 2
  14. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Hi @wannabeaflyer2

    These's motors make 1800RPM and I use a gearbox ratio of 30:1. gearbox size is 040 (50 bugs each). I guess these are strong enough. Servo lever and some other parts are CNC made. All 3D files and drawings are available on request. So should be easy to reproduce. :)
    • Informative Informative x 1
  15. wannabeaflyer2

    wannabeaflyer2 Well-Known Member

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    My Motion Simulator:
    2DOF, Arduino, Motion platform, 6DOF
    Hi @kermitkong once again thanks for the info I added some cad drawings to my DIY Linear Actuator Thread and as I love looking at the way people design stuff i'll be checking here regular as clockwork :)
    • Like Like x 2
  16. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    problems with the Roboclaw 2x60A Motor-driver,

    if they get RC-PPM signal on both channels at the same time, then the internal CPU of the roboclaw hangs (firmware bug I think) and the motors are running unexpetly :-( only a shut down/restart helps at the moment :-(

    I trying to find a fix ! Is a real HACK !
    hacking.JPG
    • Like Like x 2
    Last edited: Jun 28, 2016
  17. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    I changed the length of the rods from 600mm to 400mm. I think this length fits better to the rest of the beast.
    One side has a left-handed thread the other side has a right-handed thread.
    400mm_rods.JPG
    • Like Like x 3
    • Agree Agree x 1
  18. accelero

    accelero New Member

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    My Motion Simulator:
    2DOF, AC motor, Arduino
    Hi Kermitkong, very nice job. and seems not that much money is needed
    I didn't know gearboxes like these were available for 24 V DC motors
    Could you please give us a link, you re From Germany aren't you? You found them on ebay de ?
    • Like Like x 1
  19. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Hi @accelero

    I will share the complete BOM with the community including all 3D-drawings.
    So please keep tuned.

    The motors were bought from eBay.
    And yes these are 24V DC brushed motors.
    Quite strong with 490W max. Power consumption .

    Yes, I'm from Germany...
    • Like Like x 2
  20. kermitkong

    kermitkong Active Member Gold Contributor

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Yody ,

    1st real movement test, directly controlled by the SimTools Engine:cheers
    • Like Like x 8
    • Winner Winner x 5
    Last edited: Jul 2, 2016