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OCSM Sim (2dof + traction loss) project

Discussion in 'DIY Motion Simulator Projects' started by Overclockersmania.it, Feb 15, 2015.

  1. Overclockersmania.it

    Overclockersmania.it Member

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino, Motion platform
    As a notice for whom needs to modify these PSUs, I've successfully done the latter mod (posted by Alexey).
    I've also found a complete guide on on the internet about that: http://www.rchelination.com/setting-hp-dps-1200fb-power-supply/.

    I was finally able to set back the lever to 5 cm without any issue.
    Now it's high time to profile Assetto Corsa.
    I still have a lot of confusion about SimTools and its profiles, although I've already read the complete guide three times..I feel a bit stupid :(

    Again and always, thanks! A dream's becoming true!
    • Like Like x 1
    • Informative Informative x 1
  2. Overclockersmania.it

    Overclockersmania.it Member

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino, Motion platform
    Today it's time to ask once again a question!
    After the PSU mod everything worked fine, and I was finally able to concentrate on the SimTools profile for Assetto Corsa.
    Trial and error for a while, and at the end I could understand that in order to get enough movements and reactions I have to use the surge - sway DOF's instead of standards roll and pitch (I have also decreased the min/max values in the tuning center for those latter DOF's anyway resulting in a non satisfactory rig movement).

    Let's now talk about the problem, really strange I've to say: my rig "turns" properly, "decelerate" properly and need just some further fine adjustments (it punches too much in the small movements, I guess I've to use smooth and deadzone filters).
    What my rig really does not simulate is acceleration.
    I was expecting the rig pointing upward when accelerating but it just stays in the middle "neutral" position.
    I tried giving 100% surge only to both motors with no result.
    I tried giving 60% surge and 60% pitch to both motors with no result.
    I think I've also tried to add heave. Again nothing happened.
    Perfect deceleration but no acceleration. At all.
    Does this sound normal to your experience?
    Is there anything I'm missing?

    Thanks for your help!
    Marco
  3. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Best to post screen shots of your settings and if possible a video that captures the movement of the rig and the game on the screen at the same time.

    Have you tried turning all other settings off and just fine tune surge by itself? You can also have different Min and Max numbers in the Tuning Center, to have less deceleration surge but more acceleration surge.

    With heave the value needed in the Tuning Center is often less than 1, you can try 0.5. Again working on one force at a time gives best results.
  4. Overclockersmania.it

    Overclockersmania.it Member

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    My Motion Simulator:
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    Thanks noorbeast for your quick answer!
    I'll upload what you ask later, anyway the profile is easy: 80% surge and 60% sway (in tuning center surge is set to 3 and sway to 4).
    As I said, this profile is good for everything but acceleration.

    Here's a short video of the rig (not meaningful, but I like it! :grin)
  5. Alexey

    Alexey Well-Known Member

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    My Motion Simulator:
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    There is a min / max setting in the tuning center, is it set to +3 , -3?
  6. Overclockersmania.it

    Overclockersmania.it Member

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    My Motion Simulator:
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    Hi Alexey! Yes, surge in the tuning center is set to +3 -3.
    I'm a bit donkey but I cannot understand how set different max min values and also how to put a value like 0.5.
    For instance if I put 0.5 in the tuning center what I get when I save the settings is 5...
  7. Overclockersmania.it

    Overclockersmania.it Member

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino, Motion platform
    A short sad notice: Yesterday when I was recording the video to be uploaded here a PSU blowed up!
  8. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    The PSU puts a dampener on the fun :(

    In the Tuning Center uncheck the tick in the box next to the name of the force, capture Max Min and manually enter the value you want then save.
  9. Overclockersmania.it

    Overclockersmania.it Member

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino, Motion platform
    Thanks noorbeast!
    And the fun is still on! Today the PSU today has magically decided to work again.
    I do know exactly what happened yesterday (maybe thermal protection? here in sardinia there are 40° celsius these days) but today no issues.
    Video's coming !
    • Like Like x 1
  10. Overclockersmania.it

    Overclockersmania.it Member

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    My Motion Simulator:
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    Here's finally! Another problem solved using max=1 & min=2 in the tuning center (but again I cannot use the point/comma :sos)! The effect is awesome!

    • Like Like x 1
  11. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    My Motion Simulator:
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    Good!

    In my opinion, the upper plate-form is too flexible... It moves under the movement. How does it behave under your load?
  12. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    Try setting your computer language settings to English to resolve the input problems. You can revert back once the settings are sorted.
  13. Wanegain

    Wanegain Active Member

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    My Motion Simulator:
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    For that I edit the file directly :thumbs
  14. Overclockersmania.it

    Overclockersmania.it Member

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    My Motion Simulator:
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    @RacingMat : the upper platform it's far more stable when I sit in, or, at least I think it benefits from the increased inertia (this should show it clearly). Anyway, I decided to stiffen the middle structure to avoid those huge (and non realistic) oscillation visible in the previous video. The modification seems ok, now the structure is more rigid.

    @Wanegain @noorbeast : I could finally fine tune the profile modifying the file directly.. many thanks as usual!

    And now, as usual, question time: I'm experiencing random shutting down of the motors. Before you ask, pots are ok. I think I messed up settings in SimTools (axis limiting) and SMC3utils (max limit and clip input).
    I'm using such conservative settings like:

    Max limit = 200
    Clip Input = 255
    Axis limiting = 45%

    that I wouldn't expect this sort of problem.
    Do any of you have any idea on how the SimTools axis limiting works in relation to the SMC3utils settings? :sos

    Thanks again guys!
    Marco
  15. Wanegain

    Wanegain Active Member

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    My Motion Simulator:
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    Or probably your power supply...
  16. Overclockersmania.it

    Overclockersmania.it Member

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    My Motion Simulator:
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    I have to count the PSU out of the list this time.
    I've run the motors for half an hour today with the motion test in SMC3utils (with me on the rig, of course) and I had no issues.
    Nonetheless, each motor is supplied by one PSU, and shares the 12V with a light. If the voltage drops down, I can notice it at the moment according to a change in the light produced.

    There should be something more.
    For instance, I've noticed that one motor turns off every time a massive deceleration happens ( frontal crash, hard braking, etc),
    and only happens in game (assetto corsa)*. I tried manually producing similar decelerations in SimTools (axis testing) but no turning off resulted (I must say this was not a meaningful test:D).

    *this just makes me thinking about something wrong in the fine tuning profile, anyway it's strange that just one motor is affected..I'll investigate tomorrow!
  17. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    It sounds like that motor is going out of range in a heavy hit.

    I am curious, how does the Rift cope for tracking with the camera mounted on the pole on the rig as it is in your last video?
  18. Overclockersmania.it

    Overclockersmania.it Member

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    My Motion Simulator:
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    It works perfectly. The pattern of infrared lights in the headset is correctly recognized by the camera despite its position.
  19. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Interesting to know, @SilentChill, myself and others have encountered on rig Rift tracking issues under hash motion profiles.
  20. Wanegain

    Wanegain Active Member

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    A friend had similar issue (@zigzag49). And after testing all components, it was PSU. His PSU (low cost coming from China) can deliver more current than necessary but peaks are difficult to provide (occurs when crash) and then th PSU goes into safety mode. It's just a suggestion.