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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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    My Motion Simulator:
    2DOF, DC motor, JRK
    JRK Input

    Input.jpg

    JRK Feedback

    Feedback.jpg

    JRK PID

    PID.jpg

    JRK Motor

    Motor.jpg

    SimTools Interface

    Interface.jpg
    • Like Like x 1
  2. Historiker

    Historiker Dramamine Adict Gold Contributor

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    My Motion Simulator:
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    @Goatboy, you might also post screenshots of your axis assigments and limits in Simtools.
  3. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    In your Interface Settings set BitsPerSec to 9600.

    The jrk input values look messed up. Reset the jrks to their defaults and redo the setup procedure.
    • Agree Agree x 1
  4. Goatboy

    Goatboy Member

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    I think the youtube video was clear enough (when on 1080p you should be able to read JRK settings) on axis assignment, only one DOF effect and I used each combination of directions. As for limits , the error occurs constantly throughout the whole axis range, limiting axis doesn't change that and for that reason I haven't used it.

    Baud rate @ 9600 made no difference, Also reset the JRK but either a shaft came loose and caused a lack of feedback (which is strange cos it was all solid last night) or it's turned the motor the wrong way (even after detect motor direction)... finally answer is, I'll have to replace a broken 4mm bolt I'm using as a split pin, so can't test it further. But last time a lever smashed in to the MDF is was due to it spinning the incorrect way after I plugged the controllers in to the wrong sides. Really should have turned the duty cycle right down lol
    Last edited: Mar 26, 2016
  5. Historiker

    Historiker Dramamine Adict Gold Contributor

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    My Motion Simulator:
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    My point about using screenshots instead of videos is that the people helping you, donating their own free time, will not have to mess around with a youtube video. Instead the information would be easier to access.
    • Like Like x 1
  6. Goatboy

    Goatboy Member

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    Valid point, not everyone has great internet (hell mine is as shitty as they come)

    So here is a screenshot of a basic Axis Assignment setup that reproduces the Input disconnect errors, in fact no Axis setup has not produced those errors ...

    Axis Assignment.jpg
    Last edited: Mar 27, 2016
  7. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    I can't get 1080p at the best of times but with the Basslink being damaged I struggle to play any video, last night I could not access Xsimulator.net and half the time email won't send, that will likely remain the case for some months: http://www.abc.net.au/news/2016-03-12/basslink-repairs-hit-internet-users-in-tasmania/7241896

    There is a design lesson there in not allowing for a runaway motor, it is never a good idea even when testing.

    I would like to see images of the jrk settings when done.
  8. Goatboy

    Goatboy Member

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    My Motion Simulator:
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    Screenshots of all JRK settings tabs for both controllers should be on the 2nd post of this page @noorbeast

    I've just fixed the rig , so will be able to test more as the day goes on.

    I must say thank you to @Nick Moxley & @noorbeast for both your time and patience
  9. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    I meant jrk screenshots after you reset them to their defaults and rerun the setup procedure. As I said the jrk Input values look messed up to me.
  10. Goatboy

    Goatboy Member

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    @noorbeast Sorry, misunderstood ..lack of sleep or coffee or both. Here are the current JRK settings after a full reset , then feedback set -> motor direction detection ... PID hasn't changed. I haven't touched any of these settings, just followed the prompts to setup after resetting to default settings.

    JRK Input
    Input.jpg

    JRK Feedback
    Feedback.jpg

    JRK Motor
    Motor.jpg

    These screenshots are oriented in the same way the motors are , controller 80 does the left motor , controller 89 does the right.
  11. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    I don't understand how you are ending up with different values in the JRK input tab, can you please confirm you reset the JRKs to the factory defaults before doing the setup again. File -> Reset to default settings..

    This is an example of how the stock values should be:

    inut.jpg
  12. Goatboy

    Goatboy Member

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    File --> Reset , had to start from scratch.

    I totally agree, the max/min numbers on both sides look odd to say the least. A max of 4083 and a Min of 4081 on the left and a value of zero Min on the right. I just figured seeing as though it's greyed out , it might be of no importance or more likely it's getting the information from Simtools.

    Input.jpg
  13. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    These are JRK setting and have nothing to do with SimTools.

    If it is not resetting properly to default then something is definitely wrong.

    The Input picture you just posted is the same as the earlier one and it should not be if you have reset to defaults.
    • Agree Agree x 1
  14. Goatboy

    Goatboy Member

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    I just posted the Input tab after reset, I've only posted two Input tab photos.

    Before reset

    Input.jpg

    After reset

    Input.jpg

    Scaled feedback numbers and PID period count on the top status bar should clear that up if you look closely.
  15. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    What I am trying to say is that as far as I know the only way to have incorrect scaling values in Inputs is if you manually fiddle with values in Analog Voltage and saved the wrong settings to the device, but a proper reset will fix that.

    Turn off power to the motors and shut down SimTools then get the JRKs sorted first.

    Here is the sequence that recreates your incorrect values in scaling then shows the reset will fix it:

    1.jpg 2.jpg 3.jpg 4.jpg 5.jpg 6.jpg
    • Informative Informative x 1
    Last edited: Mar 27, 2016
  16. Goatboy

    Goatboy Member

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    No offense, but it's always been set as serial , before and after the reset I did this morning. But I will do it again after lunch and post new screenshots :cheers

    The reason I'm not giving it too much notice, is because of this line in the JRK manual; "Serial indicates that the jrk gets its target setting over a serial interface, either a virtual COM port or the TTL-level serial port of the jrk".

    Hence why I believe it's being grayed out bu default as the JRK utility has no influence over these settings whilst set in serial mode. I will reset and post screenshots to further show I have nothing to do with these settings.


    Edit:

    It also says it on the utility input tab

    Picture.jpg

    and

    Picture.jpg
  17. Goatboy

    Goatboy Member

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    My Motion Simulator:
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    So I just reset to default settings via the File menu , it made no difference to the Input table Min/Max numbers. But I did then select analog from the "Input mode" pull down menu, Reset to full range, Applied settings to device and now we have ..

    input2.jpg


    but we still get Input disconnect errors the same as we always did ..it made no difference. I stand by my claim that these settings have no effect whilst in serial mode and aren't relevant.
  18. Goatboy

    Goatboy Member

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    @noorbeast @Nick Moxley

    First off I'll apologise for not taking more time to alter the numbers in the Input tab and dismissing it. When I took another look at the settings whilst in analog mode, I noticed the warning about numbers not being in the correct order was in red.. so I figured I best find out a way to make it go away cause red is bad. The first time I looked it at it today I just wanted to see if I could change the numbers, which I could, I didn't bother to set the numbers to what I thought they should have been, again being greyed out I didn't feel it had influence over the sim. But I just went back in and set them to what I thought was logical so it now looks like this ,

    input3.jpg

    And boom, no more error messages...I've reset both control boards 3 times today, but going in and manually settings the numbers was the win.

    Again thanks for your time and patience!
    • Like Like x 3
  19. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Glad we got that sorted!
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  20. Nick Moxley

    Nick Moxley Well-Known Member

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    My Motion Simulator:
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    :cheers Noor. Good job buddy.
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