How Much Torque is Needed to Lift a 0.44m Robot Arm?

AI Thread Summary
To determine the required torque for lifting a 0.44m robot arm, it's essential to consider the arm's weight, the distance from the pivot point, and the mechanics of the cable-driven design. The torque can be calculated using the formula τ = r × F, where τ is torque, r is the distance from the pivot to the center of mass, and F is the force due to the arm's weight. Since the cable wraps 360 degrees around the pulley, it effectively transmits the motor's torque to lift the arm. Understanding the equations of rigid bodies is crucial for accurate calculations. Proper torque assessment will ensure the motor can effectively lift the robot arm in the project.
sambeecroft
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I'm having some trouble working out the required torque for a motor to lift a robot arm for my university project.

My design is cable driven so all the power has to be transmitted thorugh cables with motors at the base.

please could anyone help me work out how much torque is required to lift the 0.44m arm?

The cable is wrapped 360 degrees around the pulley on the first joint

here's a diagram of the set up:

http://img513.imageshack.us/img513/8416/physicsforumsdiagram.jpg

Thanks a lot
 
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sambeecroft said:
I'm having some trouble working out the required torque for a motor to lift a robot arm for my university project.

My design is cable driven so all the power has to be transmitted thorugh cables with motors at the base.

please could anyone help me work out how much torque is required to lift the 0.44m arm?

The cable is wrapped 360 degrees around the pulley on the first joint

here's a diagram of the set up:

http://img513.imageshack.us/img513/8416/physicsforumsdiagram.jpg

Thanks a lot

You can do this yourself. If you're having trouble remembering the equations of rigid bodies, look http://en.wikipedia.org/wiki/Torque" .
 
Last edited by a moderator:

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