|
Hi
won't the moment of inertia of the whole mass be the biggest element that is to be overcome to get the load rotating since the body is at rest?
bearing stiction will also be involved, but if we assume zero friction at the bearings, there would be a reasonable amount of torque required to start the load rotating.
I've tried rotating the RA shaft by hand with a fully balanced load, and its a fair bit. just wish I knew how to calculate it.
as per the earlier link, we can calculate torque required for a weight suspended by a string over a gear wheel. but a telescope load would be quite different.
I will have to try some practical tests.
|