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Why my motors cant working simultaneously

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by moecia, Dec 5, 2016.

  1. moecia

    moecia New Member

    Joined:
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    My Motion Simulator:
    Arduino, JRK, Motion platform, 4DOF
    Hey, guys! I am a newbee of motion simulator. I have just started my prototyping about a 2-dof motion simulator.

    I have a question that why my motors cannot working at the same time? I followed the instruction of @RacingMat at https://www.xsimulator.net/community/marketplace/arduino-code-2dof-and-2-pins-direction-hbridge.67/ and I found when I type the testing code such as "R9BL9B", only one motor can be driven.

    I checked my connection several time, I think my connection has no problem. Can anyone tell me how to deal with it?
    moecia, Dec 5, 2016
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    noorbeast, Dec 5, 2016
    #2
  3. moecia

    moecia New Member

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    My Motion Simulator:
    Arduino, JRK, Motion platform, 4DOF
    Thanks for your reply. I use Arduino UNO and MMs as controller. A couple of 10K potentiometers and a couple of small DC motors(0.35A;3V). A 12V DC power supply.

    The connection and the motors I used as the attched files

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    moecia, Dec 5, 2016
    #3
  4. moecia

    moecia New Member

    Joined:
    Oct 25, 2016
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    Balance:
    93Coins
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    +9 / 0 / -0
    My Motion Simulator:
    Arduino, JRK, Motion platform, 4DOF
    I have tested both of my motors by using the codes at https://www.xsimulator.net/community/marketplace/arduino-code-2dof-and-2-pins-direction-hbridge.67/ . Each of motors can work well. But when I type the testing code such as "R9BL9B", only the motor #1 can be driven. I dont know how to fix...

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    moecia, Dec 5, 2016
    #4
  5. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    20,539
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    145,052Coins
    Ratings:
    +10,776 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    Are the pots mounted to the motors and the boundaries set?

    At what step in @RacingMat's instructions are you having problems?
    noorbeast, Dec 5, 2016
    #5
  6. moecia

    moecia New Member

    Joined:
    Oct 25, 2016
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    Ratings:
    +9 / 0 / -0
    My Motion Simulator:
    Arduino, JRK, Motion platform, 4DOF
    1. Third step:
    "increase the angulation
    R64L64
    go farther cautiously
    R3FL3F"
    when I did the instruction. Only one motor can be driven.

    2.My pots haven't mounted to the motor(Actually I don't understand why should do it...)

    3.what the boundaries set means..?

    4. I found my pot must set to a certain postion in order to keep the motor still((As attached file shown)), otherwise the left motor or right motor will working even though I enter "R17L17"..

    Thanks for helping!

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    moecia, Dec 5, 2016
    #6
  7. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    hello!

    what you're describing is fine in fact... for the very reason that pot needs to be mounted onto the motor. :)

    think about this:
    1/ computer sends new position (motor has to go further clockwise for example)
    2/ arduino asks pot and pot replies that motor is behind position
    3/ arduino tells motor to turn clockwise and arduino watches pot value until pot value reaches
    4/ when pot value is reached, arduino stop motor
    and so on...

    Hence
    if your pot is not turning (the value is not changing), then the motor keeps turning and turning...

    if the pot is on the target value, the motor is not turning

    good news!
    RacingMat, Dec 5, 2016
    #7