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2 Dof Motion Simulator For Oculus Rift

Discussion in 'DIY Motion Simulator Projects' started by lcturkey, Aug 14, 2015.

  1. lcturkey

    lcturkey Member

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    My Motion Simulator:
    6DOF
    Hi to All,

    I am so new on this forum and I started to built a motion platform for Oculus Rift.

    Racingmat Code

    My hardware is

    Arduino Uno R3
    Pololu VNH5019- 24 V 12A ( Peak 30A )
    24V 2800 RPM 190W Motor
    Reductor Ratio 29


    Here is my wiring,
    20150814_211910.jpg

    Power Supply 24v 20A

    20150814_211808.jpg

    24v 2800 RPM 190W Motor and Ratio 29 Reductor

    20150814_211825.jpg

    here is the video while driver working with pots and with simtools



    My problem is that when I connect the pots on the motors and pull the axis to -100 or +100 motors doesnt stop and continue to run. I also tried to reduce the axis limits to %50 but nothing changed :(

    I think I need to send some codes to give a working angle to the motors but I dont know how to do it.

    Do I need to change the startup and shutdown values on the simtool ?

    Thanks to all
    lcturkey, Aug 14, 2015
    #1
  2. Ville Pesonen

    Ville Pesonen Active Member

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    My Motion Simulator:
    2DOF
    one thing you could try is to reverse the polarity from the potentiometers (5v -> gnd and gnd -> 5v). Or you could reverse the wiring to your motors. but don't do both of them as then you're back where you started.
    • Agree Agree x 1
    Ville Pesonen, Aug 15, 2015
    #2
  3. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Innovative tech specialist for NGOs
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    My Motion Simulator:
    3DOF, DC motor, JRK
    @RacingMat's code comments seem to detail what you are describing:

    The code is written to put the simulator on middle position at start :
    /* init position value*/
    int DataValueL=512; //middle position
    - if your pot is fully turned to max, as Arduino reads potentiometer value as motor position, Arduino believes that motor is in max position.
    - but the order is to be in middle position
    - so the Arduino will ask the motor to go reverse in order to go to middle position
    - your motor is turning
    - but while your pot keeps still, the motor will turn non stop !

    - when you manually turn the pot backward to min, Arduino reads that motor is in min position
    - but the order is still middle position, so Arduino will tell the motor to go forward
    - motor runs non stop until the pot is in middle position

    In the code, you have a tolerance parameter : when the pot is around middle position (<middle+tolerance and >middle-tolerance), the motor stops.
    You can broader Tolerance value to stop your motor more easily manually.
    • Informative Informative x 1
    noorbeast, Aug 15, 2015
    #3
  4. Pit

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

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    My Motion Simulator:
    DC motor, Arduino, 6DOF
    Pit, Aug 15, 2015
    #4
  5. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    • Informative Informative x 1
    Last edited: Aug 15, 2015
    RacingMat, Aug 15, 2015
    #5
  6. lcturkey

    lcturkey Member

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    My Motion Simulator:
    6DOF
    @Pit I bought them form the dealer of kormas. Do you think they are good ?
    lcturkey, Aug 16, 2015
    #6