actuating a brake or anti-backdrive

[gpetilli]

Originally Posted by Ether

... and if you're clever enough with the software, you can use the friction in the system to help hold the load when stationary.

I hope our software does not add 60lb of friction to the system . Although that might explain why the robot does not drive as fast as we would like

[Ether]

Scenario: Because of friction in the system, any force between 20 and 30 pounds will hold the load stationary once it's not moving.

If your control algorithm is clever enough, it will use as close to 20 pounds as possible to hold the load.

[asid61]

Originally Posted by Ether

Scenario: Because of friction in the system, any force between 20 and 30 pounds will hold the load stationary once it's not moving.

If your control algorithm is clever enough, it will use as close to 20 pounds as possible to hold the load.

Where is that 20-30lb estimate from? We need a brake on ours, and it would be nice if we could just hold that little amount of weight.

[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?