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Tutorial 2DOF sim

Discussion in 'DIY Motion Simulator Projects' started by groetg, Jul 23, 2017.

  1. groetg

    groetg New Member

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    My Motion Simulator:
    2DOF
    Since last year last year we are building an own race sim. I'm working on the software part and Paul is doing the mechanical part. The base is made of wood and a rear axle of a Volkswagen Golf 3. The engines are Paul's windscreen wipers his work of a Ravo sweeper (machines cleaning the street streets). We also use an Arduino with a motor controller. We used to use x-sim until recently and got a lot of trouble, but if we turn on a game and run the simulator, a com-gate error (electrostatic disturbance on the comport?) Always appears. One of the solutions we now want to investigate if the comport error also appears when using sim tools using xsimulator.
    groetg, Jul 23, 2017
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    What motor controller are you using?
    noorbeast, Jul 23, 2017
    #2
  3. groetg

    groetg New Member

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    • Agree Agree x 1
    groetg, Jul 23, 2017
    #3
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    noorbeast, Jul 23, 2017
    #4
  5. groetg

    groetg New Member

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    2DOF
    Here are some pictures of the sim so far. Just to let you know we are building for a year now (in our spare time)
    Foto 23-07-17 19 01 36.jpg
    groetg, Jul 24, 2017
    #5
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    noorbeast, Jul 24, 2017
    #6
  7. groetg

    groetg New Member

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    Yeah, I tried last weekend, and got no comport error anymore, so that looked great!! Now have to adjust the zero of the potentiometers and mount the potentiometers on the axe of the wipermotors
    groetg, Jul 24, 2017
    #7
  8. groetg

    groetg New Member

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    What do you mean with: There looks to be limited inherent design leverage.
    We grounded the wiper motors, but in x-sim this did not prevent the com port error from occurring. In Xsimulator there is no com port error so far...
    groetg, Jul 24, 2017
    #8
  9. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
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    Innovative tech specialist for NGOs
    Location:
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    Balance:
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    Ratings:
    +11,018 / 55 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    I also have a compact design rig, but it has more powerful motors, so what I mean is there is a limited distance from the pivot point to the motor connections, which is like a short lever, compared to say a shoulder mount design, which is like having a much longer leverage length.

    Have a play with SimCal to get an idea of the physiscs involved: https://www.xsimulator.net/communit...e-linear-speed-and-forces-of-your-design.270/

    A compact design needs a fair amount of torque to move the mass and wiper motors are not usually that powerful.
    noorbeast, Jul 24, 2017
    #9
  10. groetg

    groetg New Member

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    My Motion Simulator:
    2DOF
    We have calculated it and the most ideal situatie is the pivot point 40 x 40 cm from the arms, in this version the distance is 34 cm x 34 cm. I will take look. These wiper motors are from a Ravo sweeper (machines cleaning the street streets), little trucks. So they should be powerful enough (maybe we decide later to build in more powerful motors, and now get some experience with this setup)
    groetg, Jul 24, 2017
    #10