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Showroom Adding Traction Loss Journey

Discussion in 'DIY Motion Simulator Projects' started by itsumairu, Jan 5, 2023.

  1. itsumairu

    itsumairu Active Member

    Joined:
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    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    So it's been a while since I plan to add traction loss to my 2dof.motion rig.
    And finally it's done.

    First I would like to thx @Halloween2go for the video, and I basically clone his design.
    Btw, Hope I got the simtools pro license from you @Halloween2go lol.

    And for the traction loss, I use a scooter motor 24v, it's pretty powerful, and do a great job.
    IMG_20221230_090648.jpg

    I use a caster wheel just like @Halloween2go.
    IMG_20230105_212134.jpg IMG_20230105_212147.jpg

    And I want to ask, how about the traction loss setting on simtools, are you guys use extra 1 or you use yaw effect? Or both of them?
    Which one is the best?
    itsumairu, Jan 5, 2023
    #1
  2. 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
    noorbeast, Jan 5, 2023
    #2
  3. itsumairu

    itsumairu Active Member

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    Oke, I done the setup. But its hard to get it run smooth.
    I had 80% smooting, and put a big number on my max/min setup. But the motor still run harsh, especially when change direction.
    Any way to make it more smooth?
    itsumairu, Jan 6, 2023
    #3
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Could you please post pictures of your settings.

    Did you capture the Max/Min values in the Tuning Center?
    • Like Like x 1
    noorbeast, Jan 6, 2023
    #4
  5. itsumairu

    itsumairu Active Member

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    Screenshot 2023-01-07 102228.jpg
    Screenshot 2023-01-07 103615.jpg
    Screenshot 2023-01-07 103550.jpg
    I search for someone that has same issue, and still can't get it right.
    but get some insight that I have to revisit SMC3 to tune the kp and maxpwm.
    here some video result my all night effort lol
    still need improvement
    Last edited: Jan 7, 2023
    itsumairu, Jan 7, 2023
    #5
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    I would have expected the SMC3 kp to be higher, try 400, then slowly bring the PWMmax up, with it and PWMrev starting around 60, and let us know at what figure the motor starts to move.

    On a side note, dialing in TL may be easier if you initially just do that axis, without any other motion, in something like Assetto Corsa, which has a skidpad track available: https://assettocorsa.club/mods/tracks/skidpad.html

    That way you can tune the TL for when the actual rear end starts to break loose.

    Additionally, your Axis Allocations for pitch and sway look small, I would have expected 25 or more, perhaps over 30 for sway.

    [​IMG]
    • Informative Informative x 1
    noorbeast, Jan 7, 2023
    #6
  7. itsumairu

    itsumairu Active Member

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    so I try what you suggest, and the motor start at 70 pwmmax.
    actually I'm not sure what pwmrev mean. should I put the same number as pwmmax?
    and for axis 1 and 2 its necessary to put some pwmmin to get it stabilize. should I put on TL too?
    itsumairu, Jan 7, 2023
    #7
  8. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    The PWM duty cycle that is used to drive the motors in reverse (hard brake) if they enter the limit zone. Higher values here will brake the motor harder but will draw more current and heat the H-Bridge more. It may also cause an abrupt jolt in your sim as it tries to change direction. Setting this to a similar value as PWMmax would make sense: https://www.xsimulator.net/communit...driver-and-windows-utilities.4957/#post-48121

    See the same thread section for an explanation of all SMC3 settings, including PWMmin.
    • Like Like x 1
    noorbeast, Jan 7, 2023
    #8
  9. itsumairu

    itsumairu Active Member

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    Occupation:
    Psychologist
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    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    thx for your fast response.
    been a while in this project but still know nothing lol.
    really hard to pass this language barrier. better to learn more about english.

    btw, will try your suggestion and report here. thx again!
    itsumairu, Jan 7, 2023
    #9