STEPPER MOTOR AND WORM GEAR (maths)

Discussion in 'Homework Help' started by isakiwanuka2013, May 12, 2013.

  1. isakiwanuka2013

    Thread Starter New Member

    May 12, 2013
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    0
    Hello

    i need help with a project i am building but need help proving the theory..

    from the ATTACHED image... i have a satelillte (20 kg) mounted on to a flat THIN disk

    the flat metal disk weight is 10 kg

    and it is 50 cm in diameter

    connected at the bottom of this metal disk is a gear connected to it

    which will be driven in a worm gear configuration

    so i wanted to calculate the force needed to rotate the disk 180 degrees in 10 secs

    and also the torque required .

    it will be driven by a stepper motor

    because if i can find the torque i will be able to select appropriate stepper motor and worm gear.....

    this is using more math than anything

    I don't just want the answer i want to know which formulas to use and how to do it

    i want to understand more than anything and learn


    any help would be helpfull

    thank you for your time
     
  2. shortbus

    AAC Fanatic!

    Sep 30, 2009
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  3. isakiwanuka2013

    Thread Starter New Member

    May 12, 2013
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    thank you very much

    I am finding the website helpful

    lol I feel embarrased to ask this

    but as i am doing the calculations i was wondering

    is 5Kg the same as 5Kg-m^2

    ????
     
  4. isakiwanuka2013

    Thread Starter New Member

    May 12, 2013
    4
    0
    or

    I have a thin disk that

    In weight is 30 Kg in total

    It is 0.5 meters in diameter

    So moment of inertia is = I = 0.25xMxR^2

    So I = 0.25x30x0.25^2 = 0.46875 kg-m^2


    is that correct
     
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