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3dof motor 3 only going one direction

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Nikkatai, Sep 10, 2022.

  1. Nikkatai

    Nikkatai New Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform
    So I’ve got my rig back up and running but motor 3 only goes in one direction! I’ve almost tried everything, I’ve swapped out the ibt2 thinking it may of been a driver problem, tested the ibt2 on different pwm input on Arduino and same result, and I’ve tested the motor in position of motor 2 and works perfectly, I’m running 3x 33a led power supplies relay per motor to estop, any ideas? All I can think of is maybe the pins on the jumpers are not contacting properly.
    Nikkatai, Sep 10, 2022
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    Are you using wiper motors?
    noorbeast, Sep 10, 2022
    #2
  3. Nikkatai

    Nikkatai New Member Gold Contributor

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    Nah motion dynamics 20nm 200w, it’s pretty strange I’m going to recheck the wiring do a few more test, the other 2 are perfect. Unless I’ve got faulty batch of ibt’s? I’ll check that theory as well.
    Nikkatai, Sep 10, 2022
    #3
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    You could try a different Arduino or possibly baud rate.
    noorbeast, Sep 10, 2022
    #4
  5. Nikkatai

    Nikkatai New Member Gold Contributor

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    Yeah I might have to, just seems weird that when I swap the ibt from motor 2 to the 3rd input on the Arduino it works fine… just checking over this wiring once more if no go I’ll shoot down and grab one! And changing the baud rate? How do I do that? I’d have to change the code to get it working in smc3 ay?Thanks for your help!
    Nikkatai, Sep 10, 2022
    #5
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    noorbeast, Sep 10, 2022
    #6
  7. Mauro Nicolas Mugnolo

    Mauro Nicolas Mugnolo New Member

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    My friend, the same problem happens to me, my motor only activates the force in one direction, what could it be? I do use a windshield wiper motor.
    Mauro Nicolas Mugnolo, Oct 27, 2022
    #7
  8. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    noorbeast, Oct 27, 2022
    #8
  9. Mauro Nicolas Mugnolo

    Mauro Nicolas Mugnolo New Member

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    I already did the isolation now I have 3 cables but I don't know how to connect them to the bt7960

    PD:

    It strikes me that it only hard loock in one direction and not in the other, could it be that my BTS7960 is damaged?

    Mauro Nicolas Mugnolo, Oct 27, 2022
    #9
  10. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    3 wires is likely hi and low speed for wipers, you need to work out which wire is which.

    Do the motors rotate in both direction by reversing the polarity if directly wired to a battery or PSU, so taking the controller out of the equation for a moment to ensure the motors are working as expected?
    noorbeast, Oct 27, 2022
    #10
  11. Mauro Nicolas Mugnolo

    Mauro Nicolas Mugnolo New Member

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    I am testing the motor with a computer source but my problem is that I do not know how to connect the cables to the bts7960 since I have everything configured correctly I am using EMC UTILITY I use this electrical diagram

    [​IMG]
    Mauro Nicolas Mugnolo, Oct 27, 2022
    #11
  12. Nikkatai

    Nikkatai New Member Gold Contributor

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    Mine was a loose pin I hard wired everything all is good now!
    Nikkatai, Nov 20, 2022
    #12
  13. Design89

    Design89 Member

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    That's a different setup then most people are using here. It could probably work if your code has the same pins.
    Did you have a look here? https://www.xsimulator.net/communit...3dof-motor-driver-and-windows-utilities.4957/
    Design89, Jan 9, 2023
    #13
  14. Design89

    Design89 Member

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    Great! I've the same problem, but I cannot find loose wires. Got some strange reading on the IBT output aswell.. This week I will get new IBT's to test from start again.
    Which wiring diagram did you use?
    Design89, Jan 9, 2023
    #14
  15. Nikkatai

    Nikkatai New Member Gold Contributor

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    This one here

    Attached Files:

    Nikkatai, Jan 10, 2023
    #15
  16. Nikkatai

    Nikkatai New Member Gold Contributor

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    My Motion Simulator:
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    Just make sure you use smc3 to ensure the motor is following the green line( potentiometer) if not, reverse the motor wiring or pot wiring, a lot of info in the forums on how to do that.
    Nikkatai, Jan 10, 2023
    #16
  17. Design89

    Design89 Member

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    Thanks. I use the same wiring diagram.
    If I reverse the pot wiring, it does nothing. Green line won't move than.
    Reverse the motor wiring, only changes the direction of the motor and has the same problem.

    I did some testing with a volt meter
    https://www.xsimulator.net/community/threads/3-dof-faulty-ibt-one-direction.17572/
    Design89, Jan 10, 2023
    #17