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Tutorial Mounting Pots without slipping

Discussion in 'New users start here - FAQ' started by Tori, Feb 12, 2022.

  1. Tori

    Tori New Member

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    My Motion Simulator:
    3DOF, Arduino
    I am working to upgrade a rig built a couple years back that runs from the RufusDufus SMC3 Arduino 3DOF code … I’m having issues with how the potentiometers are currently mounted, because they cannot make a full rotation they end up slipping. Does anyone know of any good solutions or if switching to a rotary encoder is the best bet? 5E49D6E7-F648-4726-87C6-ABC3D6977696.jpeg
    Tori, Feb 12, 2022
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Generally speaking it is a good idea to use a flexible coupling of the correct dimensions for the pot and motor shafts to connect the two, something like this:

    [​IMG]

    The pots should not need to rotate fully. So which part slips, the pot in its mount hole or the pot shaft attached to the motor?
    noorbeast, Feb 12, 2022
    #2
  3. Zed

    Zed VR Simming w/Reverb Gold Contributor

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    @Tori - just an observation but with a motor that big you want to make really sure your feedback is bulletproof. Lose feedback and that motor can cause real damage. I wouldn’t use potentiometers at all as they can go intermittent as they wear and age. For something with those kinds of motors I’d go with Hall or optical sensors to reduce/eliminate wear.
    Zed, Feb 16, 2022
    #3
  4. Mechatronik

    Mechatronik Member

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    My Motion Simulator:
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    I'm using 1:1 30 tooth gears to connect motors with hall sensors. Flexible coupling seems better, but I haven't got much space in line with motor axis, so I had to to it different way.
    Mechatronik, Jun 14, 2022
    #4