pic: 179 Swamp Lobster = Done

[Swampdude]

Yah no kidding, and it still doesn't work right....

[wilsonmw04]

Great Robot! saw you guys playing via Web cast. My team used an arm similar to yours this year but it couldn't grip the ring. How did you articulate the upper and lower half of the gripper? I see pneumatics in there but i can't see how it's done. I would love to give my kids this as a project before our off season event in August

[Swampdude]

If you look at our gallery on our website www.179swampthing.org you'll see some CAD pictures as well as close-ups of the mechanisms. There are (2) 3/4" bore pistons with 1" strokes that actuate the rear grippers on a pivot point about 3" up from the point the piston is connected to it (so there isn't much leverage - but you don't really need it). The forward pinchers are static. Then this whole assembly is welded together and pivots on the chasis by another 3/4" piston with 5" stroke. Its hard to see and explain, but hopefully the pictures will help.