[Cory]

Originally Posted by magnets

.2 seconds to engage the hook, sure, but the containers will likely still be on the step, unmoved, for some time after that.

.2 seconds is less than the amount of time it takes for an object to fall 8 inches in free fall. Pick up a pencil, and drop it from the height of a foot. That's not much time to move your hook 6+ feet, wait for the hook to engage/settle, and begin backing up the robot.

I hope you're not planning on building a can grabber then...prepare to be disappointed if you think you can win that arms race with a mechanism that takes more than .25s to secure the can.