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motor recommendation

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by drzmat, Jun 27, 2020.

  1. drzmat

    drzmat Member

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    Hi, i already burnt 1 of my dodge ram motors just during the first tests of my rig.

    Its a pretty heavy full frame rig, around 100lbs with the car seat, foot mount setup.

    Can anyone recommend me some good motors?

    I run a VNH5019 dual motor driver and a 650w 54A PSU.

    Thanks in advance!
  2. Ads Master

    Ads Master

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  3. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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  4. drzmat

    drzmat Member

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    Already did that, but i guessed my motor specs as i dont have them. And i was probably wrong.

    Looks like i need some 50nm torque motors at a minimum to have my rig move as it should.

    Any recommendations for some 12v motors with that kind of torque?

    Thanks!
  5. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    What part of the world are you in?
  6. drzmat

    drzmat Member

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    Canada, seems like we dont have a lot of options over here.....
  7. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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  8. drzmat

    drzmat Member

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  9. drzmat

    drzmat Member

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  10. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Design also comes into it but for more mass you need greater torque, so likely the 50:1s.

    But have a play with SimCalc to check with your intended rig dimensions: https://www.xsimulator.net/communit...e-linear-speed-and-forces-of-your-design.270/
  11. drzmat

    drzmat Member

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    Thanks Noorbeast, ill get those motors.

    I know there is a Faq thread about fixing levers and pots on the pgsaw but i cant find it.

    A link would be appreciated if someone finds the thread.

    Thanks :)
  12. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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  13. drzmat

    drzmat Member

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  14. drzmat

    drzmat Member

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    When using simcalc, if i have two motors i imagine the output force should be half of the weight of my rig + driver at minimum am i right?
  15. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    See the last section of the SimCalc mathematical assumptions explanation: https://www.xsimulator.net/community/threads/simcalc-by-tim-mcguire.11277/page-2#post-140469

    Disregarding mechanical loss, to know what Newtons it will take to move something it will be Mass (kg) x Acceleration (m/s) = F (N). So to move 100kg at 0.7 m/s needs 70 N. It takes 9.8N per kg to counteract gravity. Keep in mind there is significant mechanical loss in things like the gearbox, depending on the ratio you may want to allow between 10% to 50% loss for worm gears and the greater the gear ratio the higher the % loss is: http://www.meadinfo.org/2008/11/gear-efficiency-spur-helical-bevel-worm.html
  16. Sam Neall

    Sam Neall Member

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    If you haven't already bought some motors, a good option are used wheelchair motors. I picked up two on ebay for $70 and they are plenty powerful. I have a rig that is pretty heavy as well.