How to find the torque, power and shear stress in this case

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SUMMARY

The discussion focuses on calculating torque, power, and shear stress for a TV mount using specific parameters: a rod diameter of 6mm, a length of 600mm, and a TV mass of 8.7kg. Key considerations include the movement of the TV over 600mm in 5 seconds and the necessity of understanding friction coefficients for screws and bearings. The importance of establishing a control loop for servo motors is emphasized, as it influences the required torque and power calculations.

PREREQUISITES
  • Understanding of basic physics principles related to torque and power calculations.
  • Knowledge of servo motor control systems and feedback mechanisms.
  • Familiarity with friction coefficients and their impact on mechanical systems.
  • Ability to interpret mechanical sketches and diagrams.
NEXT STEPS
  • Research the calculation of torque using the formula τ = r × F, where r is the radius and F is the force.
  • Learn about power calculations in mechanical systems, specifically using P = τ × ω, where ω is the angular velocity.
  • Investigate the role of friction in mechanical systems and how to determine friction coefficients for various materials.
  • Explore control loop design for servo motors, focusing on open-loop versus closed-loop systems.
USEFUL FOR

Mechanical engineers, robotics enthusiasts, and anyone involved in designing or analyzing servo motor systems for applications like TV mounts.

TashdGyeltshen
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Here is the sketch of the tv mount. http://1drv.ms/1G4yW6W
The known values to me are the diameter of the rod (6mm), the length of the rod (600mm), the mass of the TV= 8.7kg and that the tv is supposed to move 600mm in 5 secs. Is there any information that I am missing in order to calculate the torque, power and the shear stress? Can anyone please help me with this problem. Any help would be greatly appreciated.:)
 
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Are you planning to run the servo motors open loop, or do you intend to have feedback of some sort? Open loop does not strike me as a great idea, but if you have a control loop, that loop will establish your velocity and acceleration patterns. These in turn will define the power and torque required.
 
You need to know the friction coefficient of the different components (screws & bearings). Friction forces will probably play a major role in the torque required.
 

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