Rotocasting Motor Selection

Discussion in 'The Projects Forum' started by tlseah, Jun 2, 2014.

  1. tlseah

    Thread Starter New Member

    Jun 2, 2014
    I am trying to make a rotocasting machine around 2.5m by 2.5m, weighing about 200kg. The liquid resin for casting is slushing around in the mold so I believe the motor will experience varying loads while the mold is rotating. In order to maintain constant rotational speed (important to get an even thickness), I think that synchronous motors should be used. However, to cut costs, is it also alright to use induction motors? I am concerned that they might change their rotational speed according to the varying loads.

    On another note, I calculated the moment of inertia and multiplied it with an average angular acceleration value (max speed/assumed time to reach max speed) to get the torque requirement of the motor. Does this determine the starting torque or breakaway torque of my motor? How much safety factor do I multiply to this torque value (since it is an average value)?