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

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SUMMARY

The required torque to lift a 0.44m robot arm using a cable-driven design can be calculated using the principles of torque and rigid body mechanics. The cable wraps 360 degrees around the pulley at the first joint, which influences the torque calculation. To determine the exact torque needed, one must apply the formula τ = r × F, where τ is torque, r is the distance from the pivot point to the point of force application, and F is the force due to the weight of the arm. Utilizing these principles will yield the necessary torque specifications for motor selection.

PREREQUISITES
  • Understanding of basic physics concepts, specifically torque and force.
  • Familiarity with rigid body mechanics and equations.
  • Knowledge of cable-driven mechanisms and their applications.
  • Ability to interpret diagrams related to mechanical setups.
NEXT STEPS
  • Research the torque calculation formula τ = r × F in detail.
  • Study the principles of rigid body dynamics for better understanding of motion.
  • Explore different motor specifications suitable for lifting applications.
  • Learn about pulley systems and their mechanical advantages in robotics.
USEFUL FOR

Engineering students, robotics enthusiasts, mechanical designers, and anyone involved in the design and construction of robotic arms or similar mechanical systems.

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
 
Last edited by a moderator:
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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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