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I do not have a picture of the system, but to answer your question, yes the pulleys are spinning faster and faster.

The ropes accelerate because two ropes pinch together to grab the sheet of paper. Where it then threads it through the entire machine.

The pulleys are accelerating because the ropes are being guided by them.

This is what I did: 1)Calculate I=0.5mr^2 for each pulley 2)Added up all the I 3)Calculated acceleration for each pulley 4)Calculated required torque using I X acceleration =torque 5)Divided torque by the radius of the pulley (to get a force) 6)used hp=FV/33000 to get my horsepower

The ropes are driven by one big pulley guided by many smaller pulleys, powered by an electric motor. There are no rollers to speak of so the only thing the motor needs to spin are the pulleys (in addition to the weight of the pulp paper).

Hi, I am working on a rope drive system that threads sheets of paper through machines. I am trying to calculate how much horsepower the motor requires to do this. As of now I have a value of 300 hp for the motor and I think this is a bit too high. Can you guys give me some tips on how to solve...