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Hall sensor pot range

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by gigi, Feb 6, 2020.

  1. gigi

    gigi Active Member

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    My Motion Simulator:
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    Hallo Comunity!
    A question about potentiometers
    I have always used these potentiometers with hall sensor 6127V1A180L.5 https://it.farnell.com/bi-technolog...v1a180l-5/sensor-hall-0-2v-20v-to-10v-180deg/ dp / 2319661. The quality of this potentiometer has been widely discussed in numerous threads here and I can confirm it.
    What I wanted to ask instead is this:
    Considering that my levers have a range of about 90 ° / 100 ° max and that the potentiometers are connected directly to the motor shaft if I tried to use the same potentiometers but with a 120° range instead 180° range ( (these 6127V1A120L.5 https: // it .farnell.com / bi-technologies-tt-electronics / 6127v1a120l-5 / sensor-hall-0-2V-20v-10v-to-pin / dp / 2319659? ost = 6127V1A120L.5 & ddkey = https% 3Ait-EN% 2FElement14_Italy % 2Fsearch) would I get benefits in terms of resolution and therefore precision? Are there any contraindications in your opinion? Is it correct to believe that the more the closer the potentiometer range is to the lever range, the more the definition improves? Thanks for your support
  2. Ads Master

    Ads Master

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  3. BlazinH

    BlazinH Well-Known Member

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    Yes resolution will be increased by 33% in your case.
  4. Zed

    Zed VR Simming w/Index Gold Contributor

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    Gigi, another thing to consider is what happens if your sim moves outside the range the Hall sensor can accept. On my sim, I have a “running” range of movement but also an additional range when it parks. You can always block your sim to keep it from going outside the running range, but when a Hall sensor goes outside of the angular range it can handle, it’s no longer proportional to position and your controller may even interpret the electrical signal as a sensor disconnect. My JRKs do this with my Hall sensors. To be able to soft start my sim the Hall sensors have to have valid outputs through the whole range of both park and run.

    Are you seeing/feeling cogging or stepping in your motor movements now? I’m using 180 degree Hall sensors with some of that lost to parking the sim and not seeing any issues but that’s my sim.