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Weight on crane pivot

  1. Jan 18, 2010 #1
    Hi there,

    I've just built a crane (well, actually a jib arm), to be used on a film dolly with
    a camera on one end and a counterweight on the other to balance it.
    I'm a bit worried about the weight I'm putting on the bearings and so I started
    calculating. But I'm having a bit of trouble figuring out how much weight is
    being put on each point. How much weight is PIVOT POINT A taking and how
    much weight is PIVOT POINT B taking? Could someone enlighten me?
    The MAIN ARM has a mass of 2.1 kg/m and the CONTROL ARM has a mass of
    1.1 kg/m. Then there is the mass of the camera on one end and a massive
    counterweight on the other end. Does PIVOT POINT B actually take any weight?

    Thanks very much for any help.

    Attached Files:

  2. jcsd
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