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SMC3 Arduino 3DOF Motor Driver with SoftStart

Discussion in 'SimTools compatible interfaces' started by BlazinH, Jan 4, 2017.

Page 3 of 3
  1. iLLuac4

    iLLuac4 Active Member

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    My first two steps to troubleshoot would be to try bound rate 460800 and lover the com port to less than 10.
    Bound rate depends on the serial chip being used on the arduino board. If it is ch340 then 460800 would be a way to go.

    CH340 supports common baud rate: 50,75,100,110,134.5,150,300,600,900,1200,1800,2400,3600,4800,9600,14400,19200,28800, 33600,38400, 56000,57600,76800,115200,128000,153600,230400,460800,921600,1500000,2000000
    Last edited: Jan 4, 2023
    iLLuac4, Jan 4, 2023
    #41
  2. Design89

    Design89 Member

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    My Motion Simulator:
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    I uploaded the soft start to my Arduino.
    Startup the Arduino and only motor 1 and 2 are moving forward, this is what I have in SMC3
    Motor 1 and 2 turning 1 direction.JPG
    Motor 3 is not turning at all..
    What could be the problem?
    Design89, Jan 7, 2023
    #42
  3. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    C
    Check your wiring, in particular make sure your motor is not wired backwards.
    noorbeast, Jan 7, 2023
    #43
  4. Design89

    Design89 Member

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    What exactly do you mean?
    Reversing the + and - of the motor only makes the motor turn the other way. This is what the IBT2 does, isn't it?
    Could it be that the wires need to be connected differently than described?
    The Arduino code states:

    o|7 Motor 3 ENB
    o|6~ Motor 3 ENA
    o|5~ Motor 2 ENB
    o|4 Motor 2 ENA
    o|3~ Motor 1 ENB
    o|2 Motor 1 ENA

    3, 5 and 6 are PWM.

    But the connection says:

    ENA ----> IN1/RPWM
    ENB --+-> EN1/R_EN
    +-> EN2/L_EN (ie connect ENB to both R_EN and L_EN)
    PWM ----> IN2/L_PWM

    ENA should be PWM? Or not?
    Design89, Jan 7, 2023
    #44
  5. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    What I meant is as seen here at 26:04 onward: https://www.xsimulator.net/community/threads/new-video-on-explaining-what-i-know-about-smc3.17092/
    noorbeast, Jan 8, 2023
    #45
  6. Design89

    Design89 Member

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    Design89, Jan 8, 2023
    #46
  7. Arta Yasa

    Arta Yasa Member

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    Hi bro i try your code and set ssloop to 100 until 500 but first start still same very fast.
    And also when i set pwmmax exsample 150, and save the value after that i close the smc3 and open again the pwmmax become 11 sir, its bug or i wrong setup sir?
    Arta Yasa, Feb 8, 2023
    #47
  8. motiondynamics

    motiondynamics Member Gold Contributor

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, AC motor, SimAxe, Arduino, Motion platform, 6DOF
    The same thing happens to me too: I set SSloop to 1000, soft, linear movement. When I open SMC3Utils, in PWMmax the value of 150 becomes 12.
    It's a bug in the code, it would be good for the creator to fix it..
    However the PWMmax value, even if I read "12" is 150.
    motiondynamics, Feb 8, 2023
    #48
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