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How to choose potentiometer

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by DonCorleonez, Mar 15, 2016.

  1. Zed

    Zed VR Simming w/Reverb Gold Contributor

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    Just to add, there are also Hall sensors that have separate magnets and sensors. While you need to be careful to get the magnet aligned with the sensor axis, that’s pretty easy to do with 3D printing and there is no bearing to gall and bind. Just make a mount for the magnet that fits to the rotating part and a mount for the sensor itself that is fixed in position. Besides the need for proper magnet alignment in the X-Y plane of the sensor, there is also a distance requirement between the magnet and sensor but these are all less demanding than alignment with the shafted Hall sensors. Plus, separate magnet Hall sensors need no lubrication because nothing touches or rubs. I used separate magnet Hall sensors and they have been totally trouble free with the only issue being my output arms hit early versions on my sensor mounts and broke them. That was preventable and entirely my fault. Operationally, no issues at all with the Hall sensors. Highly recommended - shafted or free.
    • Informative Informative x 1
  2. Arihant

    Arihant New Member

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    thanks but actually there is a problem because i want to limit the movement in +/-45 deg and the smcutility has a min clip value of 255 so with this value and the specs of my 360 hall sensor, if i set the center reference value to 2.5V or 512(adc value) the movement will reach an undesire +/-90 deg. and the solution to avoid this without use gears is changing the limits of the clip value to 512 for example , so im figuring out how to change it in the ino file.
  3. Arihant

    Arihant New Member

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    i think a found a solution, in order to represent the movement of one sensor to other, for example a hall sensor 360CW can be represented as a 180cw mapping its input values to the desires output values, in a +/- 90 deg movement centered in 2,5V [512 ADC] the 360cw sensor goes from [255] to [766] and the 180cw sensor from [0] to [1023] , so we just have to map these values in the Feedback variable , im going to try it and check how smooth it goes