actuating a brake or anti-backdrive

[Ether]

Originally Posted by asid61

Where is that 20-30lb estimate from?

It's not an estimate. It's just a scenario to illustrate a concept.

Or were you asking why there's a range, rather than just a single number?

[MrForbes]

I'm drawing a blank...probably because I can't see what it is we're trying to figure out how to stop moving. Can you post some pictures or drawings or renderings of the robot or design?