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Question What is the best way to mount the lever/rod?

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Luan Ferraz, Nov 2, 2023.

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  1. Luan Ferraz

    Luan Ferraz New Member

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    Hello! It is my first time posting here.

    My name is Luan, I am from Brazil (sorry for any writing mistakes I make), and I intended to make a 3DOF using wiper motors. I know they're not the most powerful motors available, but here in Brazil everything is pretty expensive, so no upgrades for now unfortunately.

    For now I'm focusing on mouting the 2DOF part of the rig, but I'm stuck into the CTC and Rod angle/position.

    This was the first projetct design, based on DOFReality 3DOF:
    V1.jpg

    After building it, it was clear that the motors would'nt handle the forces if mounted in the front.
    20231021_154912.jpg

    So I decided to do the shoulder mount design, and literally just inverted the chair mount.
    20231028_232426.jpg
    ​
    I did some other small changes, like the size of the CTC lever (it was crazy long, about 100mm)
    20231101_220330.jpg

    But now I am stuck, and here is my question: wich way the it will perform the better (more motion, and less mechanical stress for the motors), option A, B, C, or none of those?

    mount options.png
    And in the best scenario, in wich position should I place the seat to cut the rod at the right size? It is at the "zero" of the chair, when it's levelled?

    Hope you guys can help me, thanks!!
    Luan Ferraz, Nov 2, 2023
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Innovative tech specialist for NGOs
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    My Motion Simulator:
    3DOF, DC motor, JRK
    When the chair is level the motor lever should be position so it is at right angles to the rod, as that will place the least strain on the motor in both directions.

    Limit lever movement to about 38 degrees either side of its rest position, as greater than that effective torque utilization drops dramatically, placing additional strain on the motors.
    noorbeast, Nov 2, 2023
    #2