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Question Motors dont move

Discussion in 'SimTools DIY Version' started by Peln, Nov 3, 2023.

  1. Peln

    Peln New Member Gold Contributor

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    hey guys, I'm new to motionsim. Where should I start... I have a 2DOF with arduino uno r3 and 2 Hbridges in mode 2 and two wheelchair motors. The rig is completely built and I can start the motors in the SMC3 and they adjust themselves. But as soon as I go into simtools the problems start. I entered all the parameters according to the instructions, the firewall off, smc3 off, PC in English. (I will upload pictures). As soon as I want to test the output and press turn on and move the sliders, nothing happens. On the Arduino, L lights up and the RX but not the TX. In the SMC3, however, L and TX light up and RX only lights up when the motors start up. I've been stuck for 3 days now and can't find a solution to my problem.
  2. Peln

    Peln New Member Gold Contributor

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    20231103_110200.jpg 20231103_110358.jpg 20231103_110200.jpg 20231103_110358.jpg 20231103_110200.jpg 20231103_110358.jpg 20231103_110434.jpg 20231103_110502.jpg 20231103_110518.jpg 20231103_110216.jpg 20231103_110546.jpg 20231103_110555.jpg 20231103_112237.jpg 20231103_112243.jpg
  3. Peln

    Peln New Member Gold Contributor

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    Is there a discord where you can possibly have direct communication with a professional with know-how?

    I hope u can help me. this is my darkest hour
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Copy and paste this to the Interface Output - [A<Axis1a>][B<Axis2a>]

    And set BitsPerSec - 500000
    • Like Like x 2
  5. Peln

    Peln New Member Gold Contributor

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    thanks for the quick reply. Is it possible to use 500,000 bitspersec even though my com11 for Arduino says 115,200 bps? I'll test the whole thing on Monday morning and let you know if it worked.
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Yes, BitsPerSec - 500000 is the recommended setting.
    • Like Like x 1
  7. Peln

    Peln New Member Gold Contributor

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    Thanks again for your help. Your solution solved my problem. The mistake was that I translated the page into German and achse and axis looked the same. I noticed that one of the motors lags a little. Can I somehow adjust how directly they record the signals?
  8. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    I am glad it worked out.

    Any lag should really be addressed in SMC3, which may end up with slightly different settings for each motor because of small variations in hardware manufacturing.
    • Like Like x 1
  9. Swiffty

    Swiffty New Member

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    Hello guys, I have the same issue as you Peln... however I have done the same thing that I added this Output - [A<Axis1a>][B<Axis2a>]
    and set BitsPerSec to 500000. Does not work for me... :( I am getting crazy out of it. I am using the same config as you Peln, however I have also the VNH5019 - (https://www.pololu.com/product/1451) - in both cases I can move the motors with pots and the SMC3 utils, where I just put the KP to 400 and pwr up to 255 and then the motors move. When I try the simtools and move the sliders for roll and pitch, they dont move. PLEASE HELP :( I am already desperate out of it. I can send pics of my setup as well...
  10. yobuddy

    yobuddy Well-Known Member Staff Member Moderator SimAxe Beta Tester SimTools Developer Gold Contributor

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    Simtools and the SMC3 utils app cannot run at the same time, is that maybe the problem?
  11. Swiffty

    Swiffty New Member

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    Hello Youbuddy, many many thanks, ill try it when I get to it and let you know.
    • Like Like x 1
  12. Swiffty

    Swiffty New Member

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    Hello Yobuddy. thanks, it worked for the wiper motors :) however I have now stronger motors, they are 24v, 550kw, 30A and I have the power source 24V, 600W but only 25A, the motors keep like shutting down, is that due to the power source?
  13. yobuddy

    yobuddy Well-Known Member Staff Member Moderator SimAxe Beta Tester SimTools Developer Gold Contributor

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    Are the wiper motors ground isolated?
    Where the ground wire of the motor is connected to the casing of the motor,
    Then when connected to a frame, it grounds out other things connected to the metal frame.

    Do they shutdown if no one is riding the sim?
    Less weight, so less power required to move the sim is my thought.
    If they don't shutdown, then its probably not a grounding issue, and you probably just need more power.
    Chat soon!
    yobuddy
  14. Swiffty

    Swiffty New Member

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    Hello, noone is riding the sim, as I mounted the stronger motors, as I wrote before, the power source is only 25A and the motors are 30A... they are not grnd isolated, so I try this and put it on the frame, however I was thinking about the grnd on arduino, is that ok? anyway, ill try it first on the frame and also ill try another power source which will be at least 30A, because I have feeling it is causing the issue...
    many thanks for your support mate...
    Denis
  15. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Can you please post pictures of all of your settings.
  16. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    My Motion Simulator:
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    my reply to your PM of yesterday:
    If 2 motors work great without load then you have ground isolated them: good.
    If under load, the motors shut off: there could be several reasons.
    - PSU overwhelmed
    - driver IBT overwhelmed

    My bet is PSU: 24V x 30A = 720W + 720W > 1000W

    To determine which is in cause, do your PSU or drive have LED indicators for status?
    Some PSU restart automatically after auto-shut-down. What is the behaviour? Tell us: after motors stop, what is required to move again?
    • Informative Informative x 1
  17. Swiffty

    Swiffty New Member

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    Hello, thanks for the reply, but first I have to say that I am using 2 psu's, thats why I am wondering why it shuts down, also for the next start is needed only restart of the smc3 program in pc... I dont need to shut down the PSU's...dont need to unplug the motors or the IBT2's... also I have likited the power usage in the smc3 program, so the motors move, as when I had it on full, like 255, somtimes it burned the IBT2...
  18. yobuddy

    yobuddy Well-Known Member Staff Member Moderator SimAxe Beta Tester SimTools Developer Gold Contributor

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    Sounds like it has something to do with your Max limits setting.

  19. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    I don't know how SMC3 works...