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JRK's, SimTools 2.x and the bumpy road

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Brett Horton, Sep 7, 2017.

  1. Brett Horton

    Brett Horton Active Member

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    My Motion Simulator:
    3DOF, DC motor, JRK, Motion platform
    Hey guys / Gals
    With the recent demise of 2 JRK's (both on seat movement) I pose the following question:
    With the introduction on SimTools 2.x and the lack of being able to run the JRK utility at the same time, how / what is the best procedure to assure the lack of motor drive errors, while still optimizing the PID profiles?

    Thoughts?
    Brett Horton, Sep 7, 2017
    #1
  2. value1

    value1 Nerd SimAxe Beta Tester SimTools Developer Gold Contributor

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    My Motion Simulator:
    2DOF, DC motor, JRK, Joyrider
    As a band-aid you can try these interface settings:
    upload_2017-9-7_22-7-49.png
    The movements will be jerky (;)) because this only uses 7bit resolution for the positioning (rather than the original 12 bit). Maybe this is still good enough for fiddling with the PID settings? Have a try!
    value1, Sep 7, 2017
    #2
  3. Brett Horton

    Brett Horton Active Member

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    My Motion Simulator:
    3DOF, DC motor, JRK, Motion platform
    Rgr will give it ago.
    Thanks
    Brett Horton, Sep 7, 2017
    #3
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    noorbeast, Sep 7, 2017
    #4
  5. Brett Horton

    Brett Horton Active Member

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    My Motion Simulator:
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    Yeah, I got that, I do that as well first. But it is nice to see motor errors (if any) and response in real time to the sim while actually driving
    Brett Horton, Sep 8, 2017
    #5
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    The downside of SimTools 2 using the native JRK API is that you can't run both at the same time unless you have SimTools running on a separate machine, the upside is how much more responsive SimTools is with JRKs.
    noorbeast, Sep 8, 2017
    #6
  7. Brett Horton

    Brett Horton Active Member

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    My Motion Simulator:
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    Yup agree on both accounts
    Thanks...
    So..... Is there another app or a way to see if there are motor errors at least?
    That really is what I am looking for, as I believe in light of two JRK's giving up the ghost within a week or so, that possibly I have the PID's a touch to high.
    Brett Horton, Sep 8, 2017
    #7
  8. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    If you have had 2 JRKs die then I think you need to make sure cooling is adequate and that there are no wiring issues, as those are the most likely causes, not settings. But it would also help if you post pictures of all of your settings.
    • Agree Agree x 1
    noorbeast, Sep 8, 2017
    #8
  9. Brett Horton

    Brett Horton Active Member

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    My Motion Simulator:
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    Over 400 hours in the past year, Has 2 four " fans directly over them, Large aluminum heatsinks... Not much more I could do. Can't imagine it is a power issue as they are all wired they same (Including traction loss with no issues)

    But always open to suggestions
    • Like Like x 2
    Brett Horton, Sep 8, 2017
    #9
  10. SeatTime

    SeatTime Well-Known Member

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    My Motion Simulator:
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    - So there is 400hrs on everything else including the brushed DC motors ;). If the settings on the JRKs worked fine for one years - it is very unlikely that it is a faulty JRK. as electronics just don't work that way. More likely a intermittent short in your motors - as anything else would just shut down your JRKs and not destroy them. I used JRKs in my old sim - basically found them bullet proof if used within specifications. Good luck.
    • Like Like x 1
    Last edited: Sep 8, 2017
    SeatTime, Sep 8, 2017
    #10
  11. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    2 out of 3 JRKs dying within a week suggests there may be a cause rather than coincidence.
    noorbeast, Sep 8, 2017
    #11
  12. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    • Like Like x 1
    noorbeast, Sep 8, 2017
    #12
  13. Brett Horton

    Brett Horton Active Member

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    My Motion Simulator:
    3DOF, DC motor, JRK, Motion platform
    so...... interesting stuff.... not in a good way...
    With the recent purchase of a brand new house in a brand new neighborhood, I started checking my house voltage output from several wall sockets (US) I am getting from 155 to 165 voltline out!
    Not good, I have reported this to my power company

    Never mind
    ..... Replaced battery in volt meter all is good now... lol
    • Like Like x 1
    • Funny Funny x 1
    Last edited: Sep 8, 2017
    Brett Horton, Sep 8, 2017
    #13