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2DOF + traction loss

Discussion in 'DIY Motion Simulator Projects' started by 1oldbiker, Dec 24, 2015.

  1. 1oldbiker

    1oldbiker Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    Thanks @Pit.
  2. 1oldbiker

    1oldbiker Member

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    @Ryuuken29, Yep the motors all come with the output shaft on the same side. I opened the gearcase and reversed one output shaft. About a 5 minute job. Also took time to pack some more grease in the gearcase. Those are the pgsaw motors off ebay. About $90 each.
    • Like Like x 1
  3. Pit

    Pit - - - - - - - - - - - - - - - - Gold Contributor

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    My Motion Simulator:
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    Here the basic settings, PWMmax is set to zero, if you need power you raise it up.
    smc3_basic.png
    • Informative Informative x 1
    • Useful Useful x 1
  4. 1oldbiker

    1oldbiker Member

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    Thanks @Pit I'll stick these values in.
  5. 1oldbiker

    1oldbiker Member

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    More moto monsters came in and I've got the rig working ok. During testing, I go to output testing and move the sliders around. In dof I get roll and pitch. No other movement. I can go axis and all axis respond (1 and 2 and 3). I'm going to start in on AC and Dirt 3 next.
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    It sounds like you have only set roll and pitch in the default profile settings, if all you get in output testing.

    If that is not the case then please post screenshots of all your settings.
  7. 1oldbiker

    1oldbiker Member

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    Thx, I check that out. It was fun feeling the motors move me around. I have to admit, gave me the giggles.
  8. 1oldbiker

    1oldbiker Member

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    My Motion Simulator:
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    More time beating the sim into shape. I have been having reliability problems with the feedback pots. I bought a bunch off ebay; they were old (11 digit NSN) 10k ww pots. After having 4 or 5 of the pots die, I got some chinese also ebay 10K ww pots. These seem ok, no failures yet. Mainly working on the feeling of the car. The Loss of traction is so cool, when the ass of the car comes around, it feels good. I'm using extra 1 for the lot. What is the difference between using extra 2? Should I use both? Mixed? Also what do I do with yaw? I don't find it does much. I've watched it change on the telemetry panel. I figured that yaw might only be useful in flight sims. This 2 dof sim plus lot is fun, I'm thinking I need a stewart platform. I bought extra steel tubing. lol More electric motors, more motor drivers, it's never ending.
  9. Nick Moxley

    Nick Moxley Well-Known Member

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    My Motion Simulator:
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    Extra 1 for Traction loss only, No mixing. Correct that Yaw is a Flight force, Not a Car/vehicle force and 6dof is not as simple as some are making it out to be, but if your ambition's. Go for it.
  10. Pit

    Pit - - - - - - - - - - - - - - - - Gold Contributor

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    My Motion Simulator:
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    With SimTools 2 there is a lot of changes so you can use yaw in combination with washout (because this filter is now almost working). For better control an additional slider will control the speed of the axis (filter) movements.
    • Informative Informative x 3
  11. DonCorleonez

    DonCorleonez Member

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    @1oldbiker , nice progress.
    What is traction loss pivot mechanism you going to use?
    do you mind to share your rig dimension
  12. bruce stephen

    bruce stephen Hammer doesnt fix it, must be electrical

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    My Motion Simulator:
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    more photos or maybe a video would be cool. sounds like your close to finished.
  13. AceOfSpies

    AceOfSpies Living the Dream!

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    • Agree Agree x 2
    • Like Like x 1
  14. Historiker

    Historiker Dramamine Adict Gold Contributor

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    My Motion Simulator:
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    yes but they are always "close to finished" :)
    • Like Like x 2
    • Agree Agree x 2
  15. bruce stephen

    bruce stephen Hammer doesnt fix it, must be electrical

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    yep i agree
    • Like Like x 1
  16. 1oldbiker

    1oldbiker Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    Hi gang, I have spent the last 3 months moving. Moving sucks when you're old; check, a pack rat; check, lazy; check and a few other reasons I can't think of at this time. I bought a house from a flipper, bless his heart, he'd watched too much HGTV. So I spent 3 weeks fixing "stuff". I have never actually been as hot and sweaty; rained most every day. I wouldn't wish moving on anyone, enemies or not. The sim is in its "place". I was having problems with the motors being unstable and shaking. I determined that the rig was too flexible and added more steel tubing to brace it. This was the fix. The vibration was feeding back into the servo and making the shakes. I have been working on tuning now that the rig is much more rigid. It seems to be working well. Extra steel added to seat frame.jpg Extra steel added to yaw frame.jpg Game computer and sim, lots of heat.jpg Much more steel, rig is 20 pounds heaver.jpg Power supplies in parallel control wiring enabled.jpg
    This has been a fun project. Knowing what to buy was nice!
    • Like Like x 2
  17. 1oldbiker

    1oldbiker Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    Next sim mod is getting the triple monitor working. Cables came in today for the the two additional monitors. The mounts will be welded to the horizontal tubing. I am dreaming of 6dof already. 20160916_135722.jpg
    I have the clamp and mount designed. Now to find my cutoff saw.
    • Like Like x 1
  18. 1oldbiker

    1oldbiker Member

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    Had some time; no that's a lie. I'm retired, I've got lots of time. Got the three monitor setup all welded up and a GigaByte GTX970 video card installed in the computer. Still working with settings, seems like surge and heave are the the two main forces for the driving sim. Getting it all "dialed in" is a long task. I have to go back and run sim with one force to make sure I'm still on track. Here are some more pictures. Benchmark AC.jpg Game computer and sim, lots of heat.jpg Main monitor.jpg one of the side monitor.jpg three montior setup.jpg Yaw section braced.jpg

    First picture is the benchmark test for AC. Next picture is room with my gaming computer and sim, then the next three pictures are the triple monitor setup.Last picture is the braced yaw section. It was too flexible, so I added 2 more sections of tubing. Later James
    • Like Like x 3
  19. mprofitt

    mprofitt Member

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    nice rig. my design is similar. i want to see a video of it in action.
  20. 1oldbiker

    1oldbiker Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    20151224_081051.jpg 20151223_171137.jpg 20151223_171129.jpg Here are some pictures of the traction loss linkage:
    Still working on a video for you guys. Getting the forces adjusted correctly is the majority of the sim work.
    • Like Like x 1