1. For downloading SimTools plugins you need a Download Package. Get it with virtual coins that you receive for forum activity or Buy Download Package - We have a zero Spam tolerance so read our forum rules first.

    Buy Now a Download Plan!
  2. Do not try to cheat our system and do not post an unnecessary amount of useless posts only to earn credits here. We have a zero spam tolerance policy and this will cause a ban of your user account. Otherwise we wish you a pleasant stay here! Read the forum rules
  3. We have a few rules which you need to read and accept before posting anything here! Following these rules will keep the forum clean and your stay pleasant. Do not follow these rules can lead to permanent exclusion from this website: Read the forum rules.
    Are you a company? Read our company rules

Showroom 2 DOF motion simulator - school project

Discussion in 'DIY Motion Simulator Projects' started by Witvrt, Feb 14, 2021.

  1. Witvrt

    Witvrt New Member

    Joined:
    Nov 29, 2020
    Messages:
    8
    Balance:
    112Coins
    Ratings:
    +2 / 0 / -0
    My Motion Simulator:
    2DOF
    Hi guys,

    I am a 17 years old, student industrial sciences and I am making my own 2 DOF motion simulator. I have always liked motorsport, but it's quiet hard to finance this hobby. So I switched to sim racing instead. A couple of years ago I was gifted a Logitech G27 which up to the present day is still my steering wheel. There was only one thing that I was missing, when I was racing online, namely a little bit of movement. So this year, I got the opportunity to make my own motion simulator as my last years project in middle school.

    Apart from the steering wheel and pedals I'll be making the seat and structure by myself.
    I started with making some 3d drawings of the seat before I started making it in reality. The rest of the structure will basically be 2 wooden plates, which are connected by a universal joint and 2 connection rots.

    upload_2021-2-14_17-4-1.png
    The dimensions of the seat are based my own, so the seat fits perfectly for me.
    I also added another feature on the seat so it could tilt forward (F1 position -> GT position). You can see it on the following picture.
    [​IMG]

    Now the seat is roughly finished, I started connecting all of the parts that I am using to create motion.
    Parts I am using:
    Arduino UNO
    [​IMG]
    vnh2sp30 single moto monster driver shield (2x)
    [​IMG]
    10K potentiometer (2x)
    [​IMG]
    12V DC wiper motor (2x)
    [​IMG]
    power supply (AC input: 230V, DC output: 12V 50A)
    [​IMG]
    Like I already mentioned I placed all of these components on a wooden plate which is forming the base of the whole structure.

    IMG_1396.JPG

    I don't have a good picture of this, but if you look up the 2 DOF motion simulator of Racingmatt, you will find the exact same positioning of these components. One other thing I didn't make myself is the Arduino code. I also copied this from Racingmatt. Here is the link to his project (https://www.xsimulator.net/2dof-motion-simulator-truck-wiper-motor-playseat/).

    IMG_1404.JPG

    At the moment, I am testing the whole system. But there are a few issues. I think it's due to the potentiometers which aren't giving enough feedback, which causes the motors to not completely return to the neutral position. Sometimes they even start jittering. So if there is anyone who knows how to fix this, please tell me :).
  2. Ads Master

    Ads Master

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
  3. Rifly

    Rifly Member

    Joined:
    Jan 30, 2020
    Messages:
    54
    Occupation:
    freelance photographer
    Location:
    Latvia
    Balance:
    202Coins
    Ratings:
    +21 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    99% cases for me issue would be with cheap pots or bad solder job, but also you would need to take into account that wormgear motors will have some slack, so its always in between with small jitter(depending on gear ratio, more or less)
    I've build 2dof using wiper motors with cheap pots, so press link below.
    You may have a peak into my build which hats lots of issues and lots of solutions (press on this)
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    16,236
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    118,323Coins
    Ratings:
    +9,443 / 46 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    Gearing pots is possible, though personally I prefer direct connected Hall Sensors, as while they are a bit more expensive they have great resolution, long lives and won't break if over rotated: https://www.xsimulator.net/community/faq/how-to-connect-protect-a-potentiometer.13/

    Is your rig properly balanced, with you in it: https://www.xsimulator.net/communit...-of-gravity-to-balance-a-motion-simulator.55/

    Are the wiper motors ground isolated: https://www.xsimulator.net/community/faq/wiper-motor-mandatory-ground-isolation.25/
    • Like Like x 1
  5. Gadget999

    Gadget999 Well-Known Member

    Joined:
    Dec 27, 2015
    Messages:
    1,202
    Location:
    London
    Balance:
    8,139Coins
    Ratings:
    +269 / 8 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino, 6DOF
    are you using smc3 ?

    what are your settings ?
  6. Witvrt

    Witvrt New Member

    Joined:
    Nov 29, 2020
    Messages:
    8
    Balance:
    112Coins
    Ratings:
    +2 / 0 / -0
    My Motion Simulator:
    2DOF
    Thanks for replying! I'll definitely take a look at your project:thumbs .
  7. Witvrt

    Witvrt New Member

    Joined:
    Nov 29, 2020
    Messages:
    8
    Balance:
    112Coins
    Ratings:
    +2 / 0 / -0
    My Motion Simulator:
    2DOF
    Thank you noorbeast for giving me these helpful tips! I think I definitely need to check if my rig is correctly balanced (this is such an easy and important step that I almost forgot to do this :roll) and the Hall sensors you mentioned are also something I really need to look at. They would probably help me a lot.
  8. Witvrt

    Witvrt New Member

    Joined:
    Nov 29, 2020
    Messages:
    8
    Balance:
    112Coins
    Ratings:
    +2 / 0 / -0
    My Motion Simulator:
    2DOF
    Hi Gadget999, for the moment I don't use smc3. Can I gain a lot of benefit if I would use this?
    Last edited: Feb 16, 2021
  9. Gadget999

    Gadget999 Well-Known Member

    Joined:
    Dec 27, 2015
    Messages:
    1,202
    Location:
    London
    Balance:
    8,139Coins
    Ratings:
    +269 / 8 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino, 6DOF
    lots of people use it - it has a utility that allows you to adjust the motor settings and is useful for diagnosing problems
  10. Witvrt

    Witvrt New Member

    Joined:
    Nov 29, 2020
    Messages:
    8
    Balance:
    112Coins
    Ratings:
    +2 / 0 / -0
    My Motion Simulator:
    2DOF
    Sounds very interesting :thumbs. I'll definitely take a look at it and see if I am going to integrate it into my sim.
    • Like Like x 1