pic: Team 1322 claw for 2011

[BrendanB]

Originally Posted by Chris is me

Why rotate the tube with rollers when you could put the gripper on a wrist joint?

KISS. If the top and bottom are run by two different motors, why add a degree of freedom you don't need for your design?

[Chris is me]

Originally Posted by BrendanB

KISS. If the top and bottom are run by two different motors, why add a degree of freedom you don't need for your design?

For a roller claw I completely agree, but this is a pinch claw with rolling cord used for spinning. The rollers wouldn't otherwise be on there at all.

[Basel A]

Interesting that there's two rollers on the bottom and one on the top. Wouldn't that route 2/3 of the power to the bottom rollers, such that if you try to rotate the tube upwards it'd mostly just make a quick exit? Or would the pinch hold it in?