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Showroom 2DOF Prototype, Arduino uno, MM, wipermotors

Discussion in 'DIY Motion Simulator Projects' started by BitPull, Sep 28, 2019.

  1. BitPull

    BitPull Experimenter Gold Contributor

    Joined:
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    Service Technician
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    Germany
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    My Motion Simulator:
    2DOF, DC motor, Arduino
    Hello everybody. I will show my prototype of a 2DOF Racing Rig.
    Only Prototype because i have to test the motor strength. And in the future i will replace the U-joint with a metal one and some things like suspensions and motors will be stronger. And wood will be replaced by metal. But this are future plans. I have two small twin girls and i'm playing in a Hardrock Band. So time for building is very rare!
    I'm working with:
    2x 12V wipermotors
    2x Dell 7000236-0000 Server Powersuply
    2x SparkFun Monster Moto Shield used each used as a single driver.
    1x Arduino Uno (SMC3)
    G25 Wheel, pedals and shifter.

    I habe just a view picks while growing but i think most things are
    self explanatory. If not, ask!!!

    Wooden frame for seat, wheel and pedals.
    20190926_230904.jpg
    20190927_131327.jpg

    Electronic parts while testing motors and
    potentiometers.
    20190926_230853.jpg

    Married Rig and motion.
    20190927_135329.jpg

    Fully assembled and tested.
    20190928_150743.jpg 20190928_150759.jpg 20190928_150752.jpg 20190928_150815.jpg

    More detailed pics will come tomorrow.
    Now i need to test the motion. Centering and holding position is working well.
    Last edited by a moderator: Sep 29, 2019
  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:
    3DOF, DC motor, JRK
  4. BitPull

    BitPull Experimenter Gold Contributor

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    The u-joint will be replaced asap because the bearings are not that good and frame will twist a little bit.
    I also have to stiffen and support the base plate. I thought it's stiff enough but it begins to jump on fast movement. :D

    The motors feeling strong enough i think. For testing i had to reduce the speed because it was faster than expacted.

    The motors aren't ground isolated because with a wooden frame it's not necessary. But if i will swap to a metal frame, off course it has to be isolated.

    Here are two more pics:

    Not that professional but working well.
    20190929_174717.jpg

    Front and back cooling of the MM.
    Used two aluminium blocks and an old CPU cooler with copper plate, heatpipes and fan. I use thermal pads between them.
    20190929_174737.jpg
    • Like Like x 1
  5. BitPull

    BitPull Experimenter Gold Contributor

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    Next days i will get this one to replace the weakest point of the Rig. Hopefully i can remove the middle part and have a very compact u-jount with good mounting possibilitys.
    Meanwhile i can stiffen the baseplate. I have a good idea which will also upgrade the look.
    s-l1600.jpg
    • Like Like x 1
  6. BrianWoods

    BrianWoods New Member

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    Interesting to see what you are working at. Is there a video coming to see the construction doing its job?
  7. BitPull

    BitPull Experimenter Gold Contributor

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    Hopefully this weekend i will have some time to give you an update about my project.
    I've added the big u-joint, replaced some holders, stabilized the base plate and..... i've added two more wiper motors to support the existing ones because they are to weak for fast moves under load (myself :))
    I've also added a Rift-S controller holder for motion cancellation and also a Sinuslive BassPump III to simulate engine vibrations.
  8. Tomsix

    Tomsix Member Gold Contributor

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    My Motion Simulator:
    Arduino



    Hi nice looking idea. Can u take a Pic from an other angle how its looks? Wich cooler is it?
  9. Zed

    Zed VR Simming w/Index Gold Contributor

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    My Motion Simulator:
    2DOF, DC motor, JRK
    @BitPull - there is another way to stop top frame twist. It turned out my U-joint mount wasn’t resistant to twist either but I added Panhard rods to both sides of my frame and no more twisting. There is one on each side and whichever one is in tension resists the twist. The attachment to the top frame is as close to the U-joint pivot position axis as I could get it. The other end is anchored on the bottom frame as far forward as would fit. It’s extra hardware and all but this arrangement has been totally reliable. I used all-thread to make adjustment and sizing easy then covered the all thread with wire loom plastic sheathing. They are long to keep angles low as the top frame moves but I did need just a little slack in them to allow for top frame motion.

    But a well-mounted U-joint that resists twisting works well too and is probably ultimately better.

    Nice work!

    91BFEC2E-7A9D-47A9-A2BA-9E54F4C45D82.jpeg B4839048-6665-4972-BC03-051E99EDC631.jpeg 3D40A4E3-1310-4D32-B4BE-D61DB937B00A.jpeg 4618F102-BE0F-471C-963E-DB5BED52FD7A.jpeg AC9296BF-9014-404A-8D6E-B10F5C6D47FF.jpeg
    • Informative Informative x 3
  10. BitPull

    BitPull Experimenter Gold Contributor

    Joined:
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    Occupation:
    Service Technician
    Location:
    Germany
    Balance:
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    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    Here's a picture of the new U-joint and the four wiper motors mounted. This evening i will take some pictures of the complete mounted rig and if possible a video in action.

    Attached Files:

    • Like Like x 2
  11. BitPull

    BitPull Experimenter Gold Contributor

    Joined:
    Jun 2, 2009
    Messages:
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    Occupation:
    Service Technician
    Location:
    Germany
    Balance:
    20Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    The cooler is the Ryzen 5 1600x boxed cooler on top of the motor controler under the controler is a aluminium cooler plate both attached with cooler pads.