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Showroom DX - Compact Simulator

Discussion in 'DIY Motion Simulator Projects' started by noorbeast, Sep 29, 2014.

  1. bsft

    bsft

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    Ok then , give it a thrash
  2. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Yes if you recall I asked you about the balls screws @SeatTime, as a potential solution. I think I will go that way in future, both for the efficiency gain, unpowered holding capacity which I think you said was around 70kg and likely much better capacity to take constant high torque reversals.

    Yep I will suck and see how the approaches I have taken to addressing the same issues you have picked up on go in actual practice @bsft.
  3. SeatTime

    SeatTime Well-Known Member

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    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Yes, its all really academic, as the BK bearing that supports it is only good to 153Kg dynamic (yes I did finally find the data).

    Bkbearing data.jpg
  4. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    My Motion Simulator:
    3DOF, DC motor, JRK
    I wired up the JRKs today. If I can get some time tomorrow I can throw it all back together and test some movement.

    The wiring box the three JRKs sit on also houses the Arduino and two BECs for the surge table underneath, with the fuse box on one end. It looks a bit of a mess at the moment as there is a fair bit of cable management still to come, some of which hinges on how I decide to do the HOTAS and control box mounts. I am still playing with some different options there.

    Can any of you Aussie RC fans recommend a supplier for these ball posts? I broke one when removing it from the surge plate.

    IMG_20150714_173808.jpg

    IMG_20150714_173712.jpg
    • Like Like x 3
  5. SeatTime

    SeatTime Well-Known Member

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    My Motion Simulator:
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    Hi @noorbeast . Maybe for your information In regard to the load bearing on those 60:1 etc gearboxes - something I found the other day on the Motion Dynamics site when I went looking for a new 24V motor (not easy to find).

    Note, while the motors and high ratio gearboxes are capable of great torque (up to 75nM in 320W) run times greater than an hour/day with torque over 40nM or loads exceeding 65nM for more than 1-3 minutes are not recommended for any sort of gearbox longevity. They can handle great torque for short bursts, but not for extended periods. If you require higher torque for longer periods, please look at the heavy industrial range of motors and gearboxes which are rated to run higher torque for longer periods.
    • Informative Informative x 2
  6. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    My Motion Simulator:
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    Interesting @SeatTime, do you have the link where that can be found?
  7. SeatTime

    SeatTime Well-Known Member

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    • Like Like x 1
  8. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    My Motion Simulator:
    3DOF, DC motor, JRK
    There is always Murphy's Law and I have been caught out with this one in the past where the USB cage on a brand new JRK is not properly attached to the board. I have notified the supplier and am waiting on a response.

  9. bsft

    bsft

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    I usually hear back from Pololu within 24 hrs of an email. So maybe they are ignoring you.
  10. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    My Motion Simulator:
    3DOF, DC motor, JRK
    I notified the Aussie supplier this morning @bsft once I did the video so it was clear what the issue is. I have found direct dealings with Pololu in the past have been pretty good.
  11. GIB SimRacing

    GIB SimRacing Active Member

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    My Motion Simulator:
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    Hah, I never thought to look at this. I am hunting down a gremlin in my system atm. Definitely have to have a look at the USB port on the JRK's...
  12. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    My Motion Simulator:
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    The first time I struck this it was really difficult to pick as the JRKs were mounted under the fan inside the frame and you could not observe the LEDs.

    The other thing is that vibration can either keep the usb connected for a while, or keep it from connecting, which is a real pain of a gremlin as it is inconsistent and as per the video it only takes a small amount of pressure one way or the other.
    • Agree Agree x 1
  13. speedy

    speedy Well-Known Member

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    Is it a dry solder in the USB ?
  14. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    My Motion Simulator:
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    Not that I can see, the cage looks OK so I am guessing it is the pins, it only takes slight pressure to alter the contact.
    • Agree Agree x 1
  15. bsft

    bsft

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    Hang on, you got them from Aussie supplier right?
    Interesting that I have NEVER HAD A PROBLEM ordering direct from Pololu.
    Case closed
  16. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    My Motion Simulator:
    3DOF, DC motor, JRK
    I have struck the same problem before with a JRK from Pololu, more likely it is a batch issue.

    I have actually been pretty impressed with the rapid responses from Peter Simmonds at the Aussie supplier Ocean Controls. Peter was happy for the JRK to be returned and a full refund being given on verification. Peter also offered to repair it, but I did not want to do so, both because of time and possible quality implications.
  17. bsft

    bsft

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    ZRvInRm.jpg
    • Like Like x 1
    • Funny Funny x 1
  18. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

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    My Motion Simulator:
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    Some slow progress. I upgraded the motherboard for the sim computer.

    1.jpg

    I was not really happy with the mount for the 3 JRKs so I made up a new box to replace it...much neater. I just need to notch the surge plate a little more tomorrow to fit the fan and billet cover. The new box also houses the Arduino under the JRK mount plate and the fan speed and LED controls on the front. Air exits out of 2 alloy plates facing the inside of the sim.

    3.jpg The original mount was messy.

    2.jpg

    IMG_20150727_130231.jpg The new box is much neater and can be unplugged as a unit for servicing.

    IMG_20150727_215613.jpg The fan speed control and LED light change switches are accessible on the front outside face of the housing.

    IMG_20150727_215904.jpg Air exits toward the inside.
    • Like Like x 5
    Last edited: Aug 1, 2015
  19. WowaDriver

    WowaDriver Waldemar Jost

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino, JRK
    You are a great and compact designer :D ... i think i somebody who doesn't know that your construct is a sim, may think that will be a emergency seat of a real jet or something :D
    • Like Like x 2
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  20. GIB SimRacing

    GIB SimRacing Active Member

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    As always, very impressive work @noorbeast. I know building compact AND aesthetically pleasing can be very challenging! Looks like you got it sorted though.:thumbs