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Slowest 2DOF build ...ever.

Discussion in 'DIY Motion Simulator Projects' started by Goatboy, Feb 26, 2016.

  1. Goatboy

    Goatboy Member

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    Sway was just turned down, roll was more influential on seat movement for most of the footage and I'd put the rest down to camber on the Nordschleife. I have to really work the wheel towards the end of the video to get any sway and if you slow the footage down it should match.
  2. Nick Moxley

    Nick Moxley Well-Known Member

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    ok just checking, also pointing out a easy trick to show what a particular force it like @ -50/0/+50 In the Editor and double check its directions. Still very much confused about your errors tho.....Im sure we'll get you sorted sooner than later, Sorry for the inconvenience Goatboy.
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  3. Goatboy

    Goatboy Member

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    Cheers Nick, no need to be sorry, everyone has been a great help even before I started this thread.

    I've mostly been running Assetto Corsa in windowed mode so I can see both JRK utilities and also play with SimTools. The virtual axis in SimTools and also the quick start manual helped me get my head around which direction the forces need to go.

    I'll get another power source to test if the server PSU's are causing my errors (cause they're not up to the 34a+ spikes I noticed when I limited the current to the motors), either car battery or I was even thinking of using some Boostcaps to run in-line with the PSU. Maybe it's just better to shell out some cash and get either a 12v 60a switching power supply like this http://www.ebay.com.au/itm/LED-Stri...hash=item46496b346c:m:mOe_VjABTc5xtx3iMdcAPeA or going a bit higher voltage and bring the amps down a touch with this money pit http://www.ebay.com.au/itm/Variable...hash=item1e90eb7109:m:mdsJKGw5rw8odubeQ8n_0ZA
  4. Nick Moxley

    Nick Moxley Well-Known Member

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    No need for more Power, your 600pb's are up to the task and i dont think they could possibly be causing the issues. Its Simtools/JRK related for sure.

    Wait just to confirm, will single motor's work fine by themselves ? reversing no problems ?

    Current limiting is sketchy at best, dont use it, Run it flat out.
  5. Goatboy

    Goatboy Member

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  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Great to see your rig in action :thumbs

    The base board is flexing a fair bit and that will soak up the fine motion, perhaps you could look at some reinforcement options to brace it.
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  7. Nick Moxley

    Nick Moxley Well-Known Member

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    Dont think i got an answer to this one, But do Both motor's work individually with out errors ?
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  8. Goatboy

    Goatboy Member

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    Yeah the MDF hates it, I've loaded on some free weights to take a bit of flex out of it. The next step after I'm happy with motion is to start building the lower platform out of RHS, the MDF was just so I could test and move stuff around easily.


    I'll have to test that Nick, I've ignored the errors for now and just focused on learning how SimTools works and playing with settings. But I might take the time to remove the levers and move each motor without a weight on them and see what happens.
  9. Nick Moxley

    Nick Moxley Well-Known Member

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    NO NO NO, just take away the % of axis for one motor. that will prevent it from running. Dont need to physically remove the weight of them. The un used motor can sit there in "default idle position"

    I just have a funny feeling this has SOMEthing to do with the reversing of the motor's.
  10. Goatboy

    Goatboy Member

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    Not sure if it's the way to do things but I've been settings offset numbers in the tuning center, ie: 50max -15min for surge, it takes some of the bit hits when I touch a wall or go off track but still allows for strong braking surge effect.

    Any tips or am I going in the right direction ?
  11. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Ahh, I did not realize the base was temporary. Yes RHS would do the trick.
  12. Goatboy

    Goatboy Member

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    I just turned off one axis at a time, still got the same input disconnect error whilst axis testing.
  13. Nick Moxley

    Nick Moxley Well-Known Member

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    move the motor/motor's with NO weight on them. Try and get it to error out again please.
  14. Nick Moxley

    Nick Moxley Well-Known Member

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    from the Pololu PDF

    "Bit 4: Input disconnect This error occurs when the input is above the Absolute maximum or below the Absolute minimum (these parameters can be set in the configuration utility). Additionally, when using the Detect disconnect with AUX option in Analog Input Mode, the jrk periodically tests to see whether the input potentiometer is disconnected and generates this error if it finds that it is (Section 3.b)."
  15. Goatboy

    Goatboy Member

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    Those parameters can't be set in serial mode and I don't have detect disconnect because I'm serial mode.
  16. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Are you using a usb hub and if so have you tried an alternate one?
  17. Nick Moxley

    Nick Moxley Well-Known Member

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    Absolute min and Absolute max are in the Feedback tab and is 100% adjustable. its the limits of the working range of the pots, If those have something funny going on, Thats most likely the source of your problem, the only error info on Input disconnect is what i posted. Read the PDF if you want.
  18. Goatboy

    Goatboy Member

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    I believe the parameters it refers to are the ones in the Input tab, which can be altered if Input mode is set to analog or pulse width.

    I've got the PDF printed out :)
  19. Historiker

    Historiker Dramamine Adict Gold Contributor

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    Perhaps you should post screenshots (not videos) of all of your simtools and JRK screens. That would help these gentlemen assist you better.
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  20. Goatboy

    Goatboy Member

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    I'm using a 4port USB hub that has a shielded cable, I'll have to move the computer or find an extension USB to test. Good idea though, will let you know how it goes. Although, controllers have been rock solid and been online for ages without a (USB) disconnect, left the chair on the last few days so it would hold level and I can sit in it, so it's been on for at least 12 hours now since I last turned it off.

    EDIT: @noorbeast I just removed the USB hub from the loop and still the same Input disconnect error is seen.
    Last edited: Mar 26, 2016