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Handy Spreadsheet for Calaculating Motor Torque of a 2DOF

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Tim McGuire, Oct 26, 2015.

  1. Tim McGuire

    Tim McGuire "Forever a work in progress"

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    Hi everyone!

    I'm pretty new here, and before I start pestering everyone with endless questions, I figured I'd give something back to you guys first.

    I made a spreadsheet for calculating motor size and torque needed based on the following parameters:
    -Weight of Rig
    -Distance of pivot from center of gravity
    -Maximum angle of pitch/roll
    -Time needed to reach maximum angle|
    -Distance of mounting points from pivot point
    -Angle of motor rotation for a full swing

    In addition to giving you the torque needed, the spreadsheet should also calculate:
    -The length of motor arm required
    -The absolute minimum RPM needed (this one's kind of useless, shoot for as much RPM as you can get at your needed torque load)

    I've also attached my derivations of the formulae I used in the spreadsheet, in case any physics-minded folks would like to check/verify my work.

    Derivations 1.jpg
    Derivations 2.jpg

    Attached Files:

    • Like Like x 1
    • Useful Useful x 1
    Tim McGuire, Oct 26, 2015
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Great to see a contribution as a first post :thumbs

    I will have a more detailed look later but one addition you may want to consider is allowing for the mechanical torque loss of a wormdrive gearbox, which is generally between 10-50%, with the loss being greater the lower the ratio.
    • Agree Agree x 1
    noorbeast, Oct 26, 2015
    #2
  3. Tim McGuire

    Tim McGuire "Forever a work in progress"

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    Good point! I should probably make it prettier as well haha.
    Tim McGuire, Oct 26, 2015
    #3