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My first 2Dof structure After 5years

Discussion in 'Ready, set, go - Start your engines' started by olsayd, Apr 16, 2022.

  1. olsayd

    olsayd New Member

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    Hello My name is Alan, electronic technician in Argentina.
    After 5 years that I started it and stopped several times I was able to finish it, I'm in the configuration phase and final tests! Yesterday I was excited to see it and it work, although now I find myself with some limitations regarding software paid for with licenses and before acquiring one I would like to thoroughly test that everything works and see which is the best option.

    The project is made with:
    2 24v motors (currently with a 12v source since I can't get the 24v one yet)
    1 Arduino UNO
    2 bts7960 (with high quality thermal pads dissipated by the large steel base)
    2 bourn potentiometers 10k
    Reinforced iron structure.

    I will improve the post and update with all the progress step by step

    pics :)

    Attached Files:

    • Like Like x 1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    The included Live For Speed plugin is fully functional, specifically for testing purposes.

    To qualify for a DIY license your build thread needs to show some effort and your rig being complete and ready for testing: https://www.xsimulator.net/community/faq/request-a-free-diy-simtools-2-0-license.262/

    To qualify for a free license:

    • You must be building a true DIY motion simulator. (Not built from a kit or purchased from a simulator seller, a model simulator does not qualify.)
    • Have a unique build thread or Showcase in DIY Simulator Projects. (The thread should show some effort, which means it should show progress to the rig testing phase.)
    • Have been a member of the community for at least 30 days.
  3. olsayd

    olsayd New Member

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    hello thanks for answering, I have more photos, videos, I can't find how to edit the post so that it is more verbose besides that it would take a lot of time now, maybe at night I will do it but more than anything the time now I am dedicating it to see how it works and test the simulator that in LFS the roll is inverted, I already tried changing the axes and it works in simtools but not in the game. :/

    I'm member since i started the project i think
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Check out the Forum tips in the FAQS: https://www.xsimulator.net/community/faq/forum-tips.14/category

    Including how to edit posts: https://www.xsimulator.net/community/faq/edit-your-own-posts.235/

    Unfortunately there are restrictions on members who have only just started posting, to prevent spam: https://www.xsimulator.net/communit...ed-posts-needed-before-links-can-be-used.150/

    LFS needs to be run before it is patched for motion: https://www.xsimulator.net/communit...run-in-first-person-mode-before-patching.365/

    The Dir box in Axis Assignments being checked orange or not determines which way each axis moves, this is what SimTools expects in terms of configuration: https://www.xsimulator.net/community/faq/which-way-to-set-simtool-axis-movements.230/

    You can grab a copy of the SimTools manual here: https://www.xsimulator.net/community/faq/rtfm-start-with-the-official-simtools-documentation.117/

    And check out some of the motion profile tuning tips in the FAQs: https://www.xsimulator.net/community/faq/tuning-centre-and-axis-settings.240/

    Posting photos of your settings can assist others in helping with troubleshooting.
  5. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Any further project progress?
  6. olsayd

    olsayd New Member

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    Yes, I haven't slept for days and just now I finished understanding the beautiful sotf I found, Flypt. Complicated but beautiful. My eyes burn from spending hours in front of the pc. Right now I have finished configuring the cars 2 project and the base seems to move well, although I still need to add the front part which adds weight and needs to be balanced. I also have to add more power to the motors in the Smc3 but first I fixed the vibration spikes I had with the FLYPT.

    when I have the time I will make the new post organized with every detail
    It's been 5 years since I started the project maybe the next one will be a 6dof or 360
    I have not had time to make the post from the beginning as it should. I got a little frustrated with the settings
    My room is a mess lol

    Attached Files:

    • Like Like x 1
  7. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    • Like Like x 1
  8. olsayd

    olsayd New Member

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    Hello, I have a question for you that I'm complaining about with the configuration... the sim only works perfectly, but when I get on it, a motor is disconnected... it revives only by reconnecting the arduino or the scm3... any ideas? Doing stress tests, I noticed that if I stand on top of the other motor, it exerts force for a few seconds, turns off and falls due to my weight. They are wheelchair motors, not a worm motor and they suffer from all the weight, is there a way to bypass that protection or why is that happening?

    :,(

    Attached Files:

  9. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    My guess, in overall design and settings you are likely under estimating the torque requirements for a compact design.

    For example, effective torque utilisation drops off rapidly after about 38 degrees up and down of lever movement, yet this photo shows a lever almost at full extension and parallel with the rod:


    [​IMG]
  10. olsayd

    olsayd New Member

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    Thanks for reply, Yes, in the image the sim is turnoff, so, for the weight it falls forward. I uploaded it to see the type of motors and how they are configured, the problem is that when I get on, my weight (66gk) makes the motor turn off at +-10s, whatever the motor that I get on. x seconds the program does not keep the torque and disables. and here in the photo it's unbalanced but when I get on, it balances with my weight... I'm thinking of changing the motors for ones with a worm system but it will take me days or months to get them :'c that's why I wanted to know if I could use the software correct that problem.

    although the best estimate will be to change the box, what ratio do you recommend? 1/50?

    I clarify that the motors move with great force, everything without problems, the problem is that they disconnect when weight is added (my weight) in "x" seconds
    Last edited: Apr 25, 2022
  11. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    In my experience 60:1 can't be back driven.

    But before you go down that rabbit hole consider moving the motor placement to increase inherent design leverage, at least to the maximum the upper frame allows.