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My 2DOF Kit Build

Discussion in 'DIY Motion Simulator Projects' started by Paul Shortland, May 15, 2015.

Page 3 of 7
  1. Leo Burton

    Leo Burton Active Member

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    My Motion Simulator:
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    Sounds like exactly the problem I was having, and it was simply swapping the pots in the arduino.(A1 A0) That fixed it for me. It sounds like the motors are hunting.
    Leo Burton, Jun 1, 2015
    #41
  2. Paul Shortland

    Paul Shortland Active Member

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    Yeah I hoped that would be the issue but it is the same with A1 A0 as it is with A0 A1.

    Feel so close now too!
    Paul Shortland, Jun 1, 2015
    #42
  3. Pit

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

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    My Motion Simulator:
    DC motor, Arduino, 6DOF
    Try to switch the polarity of the pots OR of the motors. The pot has to work in the "opposite" direction meaning if I turn the pot left the motor turns right (no coupler connected).
    Pit, Jun 2, 2015
    #43
  4. Paul Shortland

    Paul Shortland Active Member

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    Have been advised to amend my Ard code. Seems the Ard and Saber boards are trying to communicate at different speeds. Will be tomorrow before I can test this but I am feeling hopeful :thumbs
    Paul Shortland, Jun 2, 2015
    #44
  5. Pit

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

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    My Motion Simulator:
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    Of course that would be a completely different issue. I am sure you will sorting it out :)
    Pit, Jun 2, 2015
    #45
  6. Paul Shortland

    Paul Shortland Active Member

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    It lives! :thumbs:thumbs:thumbs

    I changed the Ard code as it was connecting to the sabertooth at 9600 whereas the sabertooth was connecting at 115200. Also a dip switch on the sabertooth was wrong.

    Only tested with the game engine output test so far, hope to get iRacing running tomorrow :grin
    • Like Like x 3
    • Winner Winner x 1
    Paul Shortland, Jun 3, 2015
    #46
  7. Leo Burton

    Leo Burton Active Member

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    Congrats!!! Its such a good feeling when it kicks into life!

    Now comes the long process of tuning it to your liking!
    • Like Like x 2
    • Agree Agree x 1
    Leo Burton, Jun 3, 2015
    #47
  8. Paul Shortland

    Paul Shortland Active Member

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    My Motion Simulator:
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    iRacing works too :grin:grin:grin

    Setting the settings is 'interesting'!

    How do these look?

    upload_2015-6-4_10-23-32.png
    upload_2015-6-4_10-23-47.png

    upload_2015-6-4_10-24-3.png
    Paul Shortland, Jun 4, 2015
    #48
  9. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    • Like Like x 1
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    noorbeast, Jun 4, 2015
    #49
  10. Wanegain

    Wanegain Active Member

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    Just to be sure I understood what you mean @noorbeast : you recommend to lower the Max/min value in order to lower % from each DOF to get 100-120% for all the DOF for one axis ? Very interesting !

    By doing that you will reduce the data range and big movements will be shaped ?

    When I start a new profile, I try each force one by one and I try to find the perfect value and then I lower from 10-20% to mix all effects. I am more than 100% for sure !

    This evening, I'll try your method and see if I can feel a difference.
    Wanegain, Jun 4, 2015
    #50
  11. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    It is a bit of a balancing act. As @eaorobbie explains "motion cue is lost because it pasts 100% of the Axis Total Movements".

    There are both design element that can affect allocations, for example a compact sim has more possible pitch percentage than roll, plus there can be a degree of cancellation between forces allocated to one axis.

    It would seem to be that problems start to really kick in if the total is 130+%, but best to get as close to 100% total axis allocation as possible.

    You can fine tune the effect in the Tuning Center. For some forces, such as heave, it is not unusual to have a setting less then 1 and in some of mine heave is 0.2- 0.5. I think the smallest possible Tuning Center setting is 0.001.
    noorbeast, Jun 4, 2015
    #51
  12. Wanegain

    Wanegain Active Member

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    Thank you for this explanation.
    So the % near to each DOF is a % of the axis and not the power of the effect o_O:confused: ?
    The things is that I was thinking the value in tuning center was representing G-force and all my profiles are based around +/- 5-6 for sway, heave and surge :think

    I have to review all my profiles :mad:. I spent so many hours to find the best settings :(...

    Anyway it's good to know, thanks again ! :cheers
    Wanegain, Jun 4, 2015
    #52
  13. Paul Shortland

    Paul Shortland Active Member

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    My Motion Simulator:
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    Mine is improving, nearly threw me off the chair!

    However my pitch and roll are the wrong way round.

    When I accelerate the chair leans right, braking leans to the left.
    Also turning right pitches it forward and turning left pitches it back.

    Is there an obvious thing I did wrong? ( I only have Roll, Pitch and Surge set at the moment)

    upload_2015-6-4_12-35-4.png
    upload_2015-6-4_12-35-17.png
    Paul Shortland, Jun 4, 2015
    #53
  14. Wanegain

    Wanegain Active Member

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    My Motion Simulator:
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    If it leans right when you accelerate, it means your left motor is going up instead of down. Just clic on Dir next the surge DOF for your left motor (Axis1 I guess ?).
    If it pitches forward when turning right it means your left motor is going up instead of down. Clic on Dir next the sway DOF for your left motor.

    Edit : don't forget to Save settings...

    :thumbs
    Wanegain, Jun 4, 2015
    #54
  15. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    • Agree Agree x 1
    noorbeast, Jun 4, 2015
    #55
  16. Paul Shortland

    Paul Shortland Active Member

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    Paul Shortland, Jun 4, 2015
    #56
  17. Paul Shortland

    Paul Shortland Active Member

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    I was using roll and pitch but pointing me the right way :thumbs
    Paul Shortland, Jun 4, 2015
    #57
  18. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    • Informative Informative x 1
    noorbeast, Jun 4, 2015
    #58
  19. Paul Shortland

    Paul Shortland Active Member

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    :cheers all working now, quite violent at times! Now waiting for my custom made wheel and pedal attachment to arrive. Might be here today or tomorrow.
    Paul Shortland, Jun 4, 2015
    #59
  20. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Great, please do shoot and post a video when you can :thumbs
    noorbeast, Jun 4, 2015
    #60
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