Servo Torque

Let's Make Robots Project Ideas
1

Hello again!

Just curious as to how to go about making the calculations for servo torque? (Torque) / (distance from the horn) = weight supported? Or am i totally off track?

Thanks!

2

So just basic physics eh? It’s been a while. Exactly what I was looking for.

3

Hi HeavyArms,

Welcome to the RobotShop Forum.

Torque = force x distance (from pivot), or, T=F*D
Although “force” is usually in Newtons or lb-f, servo manufacturers seem to have used Kg and oz.
You can change this equation around and calculate for F = T/D or D = T/F.
Just be certain of the units.

If a servo can provide 5Kg-cm of torque, that means it can (theoretically) lift 5Kg at 1cm away from the axis of rotation, or, 1 kg at 5cm from the axis of rotation.

Hope this helps,