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2DOF Sim

Discussion in 'DIY Motion Simulator Projects' started by Trafalgar, Nov 7, 2014.

  1. Trafalgar

    Trafalgar New Member SimAxe Beta Tester Gold Contributor

    Joined:
    Oct 5, 2014
    Messages:
    23
    Location:
    France
    Balance:
    13Coins
    Ratings:
    +11 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Hello everybody, I'll make a 2DOF for my seat.
    Hardware:
    12V DC Geared Motor, Motor with 60:1 ratio Gearbox (Right Hand) and (Left Hand)
    http://www.ebay.fr/itm/111415229286?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
    2x Power supply 12V 50A 600W
    http://www.ebay.fr/itm/351108980724...eName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
    2x Pololu JRK 12v12
    2x Potentiometer 10k PPC27

    Agricultural cardan
    IMG_20141006_165514.jpg
    IMG_20141018_112222.jpg
    Sizes of the plates 20x20
    IMG_20141104_165124.jpg IMG_20141104_165224.jpg
    Dismantling of gearbox before drilling
    IMG_20141018_174108.jpg
    IMG_20141023_121835.jpg
    Cutting and drilling of motor mounts
    IMG_20141031_143203.jpg
    IMG_20141031_144157.jpg
    The mechanical and almost finished, tomorrow I will make pictures of all and I'll start the electronic part.

    PS: My English is very poor, I'm sorry :blush
    • Like Like x 2
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    20,461
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    144,602Coins
    Ratings:
    +10,741 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    Great start @Trafalgar, you really have it moving along and with 60:1 it should move just about anything.

    Your English is fine and in many way pictures are a good way to go.

    Have you done the frame itself yet and if so do you have any pictures of that?

    I am looking forward to your next project update.
  3. bsft

    bsft

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    good job man, will keep an eye on this one
    All hail the JRKS!!!
    • Agree Agree x 1
  4. Trafalgar

    Trafalgar New Member SimAxe Beta Tester Gold Contributor

    Joined:
    Oct 5, 2014
    Messages:
    23
    Location:
    France
    Balance:
    13Coins
    Ratings:
    +11 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    @noorbeast I made a wooden cockpit when I bought my wheel (Porsche 911 GT3 RS V2 Wheel EU). After finding my seat equilibrium point, I wanted to keep the possibility of setting with the seat rail.
    IMG_20141107_094234.jpg IMG_20141107_094312.jpg I finished the mechanical part
    IMG_20141107_094510.jpg
    IMG_20141107_100116.jpg
    IMG_20141107_100753.jpg
    Now the electronics with JRK :sos
    • Like Like x 3
  5. bsft

    bsft

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    Good idea, I recall @Rastus did the same thing and at his young age of 86, its easier for him to get in and out of his seat mover sim

    With JRKS, no problem, just holler if you need help setting up.

    EDIT, oh and turn the motor levers the other way
    • Agree Agree x 1
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    20,461
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    144,602Coins
    Ratings:
    +10,741 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    Very compact design @Trafalgar, the seat rails are a great idea and looks really sturdy. At this rate you will have it moving in no time.
  7. Trafalgar

    Trafalgar New Member SimAxe Beta Tester Gold Contributor

    Joined:
    Oct 5, 2014
    Messages:
    23
    Location:
    France
    Balance:
    13Coins
    Ratings:
    +11 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    I wanted to keep the same dimensions for my cockpit, that's why it is very compact. Maybe a little too much, I have yet to find a location for my two power supply :eek:. I did the manual calibration potentiometers with my two card JRK. The control with the target set is very sensitive, if exceeded, motors oscillate.
    For learning, should we adjust the range of the potentiometer 180 ° or 90° ?
    For PID, what are the standard values ?
    @bsft I have a motor in one direction and the other reversed, if I do not keep this configuration, the motors oscillate loudly.
    I'll take pictures soon, but I still did not find how to attach the cards pololu :mad:
  8. bsft

    bsft

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    heres a video that might help. All I did was just set the feedback]


    I dont adjust anything
    If motors occilate, it sounds like PID.
    Set D and I to 0. work with P, move P up in increments of 0.1 and test each time in the slider input tab till it oscillates. Once it hits that , halve that value. Then work with D, again working up in increments of 0.1 and test again in slider in input tab till it moves nice and solid.
    Leave I at zero
    Can you please send me screen shots of you PID settings so I can see them.
    With one motor leaning the other way, the whole frame is going to be lopsided. Yo may just need to invert motor direction and or feedback direction in utility settings.
    • Useful Useful x 1
  9. Trafalgar

    Trafalgar New Member SimAxe Beta Tester Gold Contributor

    Joined:
    Oct 5, 2014
    Messages:
    23
    Location:
    France
    Balance:
    13Coins
    Ratings:
    +11 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Hi, I'm back :)
    I stuck heatsinks (heatsink for Raspberry Pi) on the big chips.
    IMG_20141115_085435.jpg
    IMG_20141115_090241.jpg
    IMG_20141115_090740.jpg
    I found a location to secure the two power supplies.
    IMG_20141108_170557.jpg
    I tinkered a electrical junction box to put my two JRKS
    IMG_20141115_122810.jpg
    IMG_20141115_122755.jpg
    I began the paramètrage of cards JRKS, here are the screens of values Max/Min of my two engines.
    Mdroit.png
    Mgauche.png
    For PID settings & motor, I used the values on the topic Erwan960, I will refine them again later.
    With these values, I have done my first test on LFS :cheers
    The seat moves :thumbs, I have to finish fixing the steering wheel and pedals on my cockpit.
    I have not yet understood how to get the plugin for Assetto Corsa and DIRT2, he'll have to look at it quickly.
    • Like Like x 1
  10. bsft

    bsft

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    looks good man, yes fiddle with PID later, just get the thing running first.
    • Agree Agree x 2
  11. Slider

    Slider Active Member

    Joined:
    Jul 28, 2014
    Messages:
    155
    Occupation:
    Irrigation
    Location:
    Brisbane
    Balance:
    1,130Coins
    Ratings:
    +112 / 0 / -0
    My Motion Simulator:
    2DOF, JRK
    Some great work here, keep it up! I will keep spying on this one
    • Agree Agree x 1
  12. Pit

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

    Joined:
    Oct 2, 2013
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    Location:
    Switzerland
    Balance:
    30,409Coins
    Ratings:
    +3,088 / 31 / -0
    My Motion Simulator:
    DC motor, Arduino, 6DOF
    Great, keep up the good work!
  13. Trafalgar

    Trafalgar New Member SimAxe Beta Tester Gold Contributor

    Joined:
    Oct 5, 2014
    Messages:
    23
    Location:
    France
    Balance:
    13Coins
    Ratings:
    +11 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    I almost finished my 2DOF, but I'm not very satisfied. In terms of movement, surge & sway ok, it seems to be synchronized with the games.There are however things to that hinder me. I tried the following games, Assetto Corsa, Game Stock Car 2013, DiRT 2 & 3, RaceRoom Racing Experience.
    1_When the acceleration is finished, for exmple from 0 to 100 mph, to 100mph the seat should not return to its original position 0?
    It no longer of pushed, the speed is constant.
    2_On a game like Dirt2, the road is rutted, often my engines vibrates at certain extreme positions. This game is the most problematic, because the road is not linear. I am often in excess of instruction on all my games.
    3_But in general, I do not feel the mouvenents heave, pitch, roll and yaw. Is this normal?
    here is my screens of my configuration, if anyone can tell me where I'm wrong.I'll change the way of doing my turn potentiometers, for setting taken directly, perhaps change the potentiometers. For my potentiometers, I use sprocket a 32 tooth and a 20 tooth.
    Moteur droit.png Moteur gauche.png Moteur.png PID.png
    Use you smoothing, washout, deadzone option in Game engine ?