Recent content by jgayetty

  1. J

    Need Help Calculating Torque Required For Project

    Sorry, I thought I provided 99% of the relevant info and was hoping for an answer. Thank you to all who posted. I will just order a motor and try it...that seems to be the easiest way to know how much torque is required. Here is a guy who built what I want to build. If anyone is...
  2. J

    Need Help Calculating Torque Required For Project

    May I reframe the issue a bit? Instead of focusing on the "pendulum" aspect of the design, think of it as simply moving 600 pounds along the horizontal plane. Disregard friction as well. Just a basic horizontal movement of 600 lbs. In that case, how much torque would it take to get the...
  3. J

    Need Help Calculating Torque Required For Project

    So that's about 200 inch pounds. Good so far (motor is 600 inch pounds) How does one calculate starting torque required? Thanks again!
  4. J

    Need Help Calculating Torque Required For Project

    Yes, a couple of you commented on this timing "issue". Originally, I tried to design the propulsion of the bed so that it would synchronize with the natural frequency at which the bed would rock. Just like when I push my kids on a swing. I wait until they swing back naturally then I push...
  5. J

    Need Help Calculating Torque Required For Project

    Almost missed your last question: The arms will likely be common chain.
  6. J

    Need Help Calculating Torque Required For Project

    Thanks for the reply. A rocking bed that hangs from 4 foot arms on each corner. I came to the 1000 lb figure assuming a worse case scenario. The actual weight of 2 people and bed may be more like 600 lbs. I figured a simplistic explanation may help narrow it down to the bare physics...
  7. J

    Need Help Calculating Torque Required For Project

    Hello, I am working on a home hobby project and I need a motor to move an approx 1000lb weight back and forth - similar motion to a pendulum - at a rate of about once every 4 seconds. The problem is, I don't know how powerful the motor has to be to accomplish this. And since gear motors...
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