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Question Choice half effect

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by motiondynamics, Nov 3, 2023.

  1. motiondynamics

    motiondynamics Member

    Joined:
    Apr 12, 2019
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    My Motion Simulator:
    2DOF, 3DOF, DC motor, AC motor, SimAxe, Arduino, Motion platform, 6DOF
    Hi, I need to obtain a halfway effect, I'll explain better:

    I have an actuator with a 10K linear potentiometer, 10cm.
    Obviously the feedback center is located in the middle, i.e. at 5cm (5K).
    For technical reasons, I need the SURGE effect not to make me move the piston up and down, but only down, therefore from 0 to -5.
    So the movement from 0 to +5 must be null, stationary.
    How can I do?

    Attached Files:

    • POT.jpg
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    motiondynamics, Nov 3, 2023
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
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    Innovative tech specialist for NGOs
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    St Helens, Tasmania, Australia
    Balance:
    147,009Coins
    Ratings:
    +10,845 / 53 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    You can manually set independent axis values in the Tuning Center, including zero, so perhaps give that a go.
    noorbeast, Nov 4, 2023
    #2
  3. nnelsonn

    nnelsonn New Member

    Joined:
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    My Motion Simulator:
    3DOF, DC motor
    Or adapt the SMC3.ino to ignore pot-values over 256.

    What happaned, when the movement is over 0V?
    nnelsonn, Nov 8, 2023
    #3
  4. motiondynamics

    motiondynamics Member

    Joined:
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    My Motion Simulator:
    2DOF, 3DOF, DC motor, AC motor, SimAxe, Arduino, Motion platform, 6DOF
    Hi nnelsonn,
    I have practically always had the electric actuator swinging in the central position, it is never still (except sometimes... but rarely).
    When in the center, the actuator moves up and down a couple of millimeters (+2 down and +2 up), continuously.
    This happens when I apply a payload on top, but if I place it horizontally on the bench, it doesn't oscillate.
    I wish I could block this oscillation.
    motiondynamics, Nov 8, 2023
    #4
  5. nnelsonn

    nnelsonn New Member

    Joined:
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    Location:
    Germany
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    My Motion Simulator:
    3DOF, DC motor
    I understand. You could set up a dead zone in the SMC3.ino.
    Is an arduino-programmer in the forum?
    nnelsonn, Nov 8, 2023
    #5
  6. motiondynamics

    motiondynamics Member

    Joined:
    Apr 12, 2019
    Messages:
    176
    Balance:
    1,059Coins
    Ratings:
    +7 / 0 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, AC motor, SimAxe, Arduino, Motion platform, 6DOF
    The only dead zone that can be adjusted BY SOFTWARE is with SMC3Utils "Dead Zone" (from 0 to 20), but it doesn't solve the problem.
    I would like to act directly on the SMC3.ino v1.0 code
    Surely there is someone in the forum who knows how to do it, I'm waiting for some answers.
    motiondynamics, Nov 8, 2023
    #6