1. Do not share user accounts! Any account that is shared by another person will be blocked and closed. This means: we will close not only the account that is shared, but also the main account of the user who uses another person's account. We have the ability to detect account sharing, so please do not try to cheat the system. This action will take place on 04/18/2023. Read all forum rules.
    Dismiss Notice
  2. 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!
  3. 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
  4. 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

New project

Discussion in 'New users start here - FAQ' started by Kass55, Aug 21, 2015.

?

Arduino or jrk controllers for 3DOF or 4DOF

  1. 2 x Arduino

    66.7%
  2. 3 x JRK

    33.3%
  1. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Hi, I haven't been on for a while as I've building the new rig.

    I have dropped the idea of the tennis balls for the moment...
    partly because it will increase the distance between my pivot (universal joint) and the centre of gravity
    but mainly because I was keen to get it running by Christmas (time to play)

    I will take some pictures and post them here this weekend.
    I may also get a friend to take video later with it working, although I'm not sure if I will post it here or on YouTube.
    • Like Like x 1
  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:
    144,596Coins
    Ratings:
    +10,741 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    I will be looking forward to your update.

    You will need to post the video to Youtube, which you can then embed in your post. You can't host big video files here on the site.
  3. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Hi, here are some pictures of my working 2dof rig
    As you see I've a standard second-hand racing seat and mounted rear head speakers/
    20151110_135003.jpg
  4. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    I'm using a 760W Corsair PC power supply.
    I've use 2 JRK controllers and I added a PC aluminium heatsink (cut in half) and additional 120mm cooling fan
    20151110_135118.jpg
  5. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    I'm using wiper motors and external Pots connected via rubber tube and jubilee clips
    20151110_135051.jpg
  6. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    My seat is connected via M8 threaded rods and rod ends
    with bass speaker underneath, static on base.
    20151208_153405.jpg
  7. 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:
    144,596Coins
    Ratings:
    +10,741 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    I am looking forward to a video of your rig in action.

    What CTC distance are you using on the motor levers?

    It would be a good idea to check all brackets for flex once you get it running, especially under load.
  8. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    >>good idea to check all brackets for flex
    Yes good point, I'm currently looking at this, as the arms flex side to side a little with my weight on it.
    My pedals are static, but need raising up a bit, and mounting better / more strong as they take of my legs & feet.

    I assume CTC is Centre to Centre. If so motor arm CTC length is 55 mm
  9. 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:
    144,596Coins
    Ratings:
    +10,741 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    The greater the CTC the more the linear speed, but the less torque available, and with a compact sim generally you need a good amount of torque.

    I suspect 55mm CTC is way too big and you will likely need to drill some additional connection holes in the lever at a smaller CTC once you start testing it under load.
  10. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    >>55mm CTC is way too big
    It seems to work okay, at least in live for speed saloon car game.
    I may drill holes, so I can try a shorter mount point, which will be better Formula 1 racing.

    I have it well balanced, so main weight is on Universal joint and centre gravity when sitting.
    Both motors work together to share the load.
    Also wheel & pedals are not moving, so legs & arms take away some weight.
    Also at mid point seat is exactly level.
  11. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    What CTC distance would you suggest I try ?
    I attach 2 pictures to show extent of current setup left & right movement: seat-left.jpg seat-right.jpg
  12. 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:
    144,596Coins
    Ratings:
    +10,741 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    If it carries your load OK then leave it as it is. But if the motors get hot after extended use then try 40mm CTC.
    • Agree Agree x 1
  13. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Sorry I haven't posted, I've been busy building.

    The moving seat platform was originally sheet MDF, with wood arms and lots of steel brackets.
    This was easy to adjust & change, until I had size correct. (I have limit space in single spare room)

    I now converted the moving platform to Aluminium which is rigid and lighter,
    but was NOT worth all the work as I only saved 4KG, but it does look better

    I added a telescopic (so I can fold away) leg extension for foot pedals to move with the seat.
    I also adjusted seat back to re-centre extra weight caused by legs.
    This makes game feel much better (worth doing).
    Although wiper motors do struggle to cope. I added cooling fans and limit play to 1 hour at a time.

    I added, 2 Drayton TT25 vibes, which connect via a Levy 2024 amplifier, to centre and bass speaker jacks (in 5:1 setup).
    These work great, to engine vibration and vibration going over circuit rumble strip curbing (depending on game).

    I have spent a lot more time building then driving, but its a interesting challenge.
    • Like Like x 1
  14. 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:
    144,596Coins
    Ratings:
    +10,741 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    I hope new photos and a video are soon to follow @Kass55.
  15. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    I've added a couple pictures, as it is now.
    I can change the angle and length of leg extension for different people.
    20160424_130712b.jpg 20160424_130830.jpg 20160319_165843.jpg
    • Like Like x 1
    • Creative Creative x 1
  16. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Hi, I thought I would update this post.
    I wanted to make above 2DOF better,
    but didn't want to buy expensive motors from abroad,
    as I have been unable to find suitable motors in UK.

    So my solution is to use 4 wiper motors instead of 2, simple.
    I placed 1 wiper at each corner and a telescopic tube in middle to hold universal joint,
    This way if any motor goes out of sync or stops working (for any reason),
    then I wanted build some give in the system.
  17. Kass55

    Kass55 Member

    Joined:
    Aug 19, 2015
    Messages:
    70
    Occupation:
    PC support
    Location:
    UK
    Balance:
    325Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Previously 2 wipers needed to be set to around 50% - 60% on an axis to get suitable movement,
    but now with double the motor power, I set to 25% - 30% per axis and still get good movement.

    Before with 2 wipers I could only have Roll and Pitch,
    Now with 4 wipers, I can have Roll, Pitch, Sway and Surge movements.
    As before, motor arms CTC have to be kept short at 40mm.