pic: Sprocket legality?

[MattC9]

Thanks for all the replys, they have all been great. I took this picture right after we put the sprocket in and now it does have a 2nd point of contact. Our arm is a 4 bar linkage with a 30in "finger" on the end of it and it weighs about 35lb, so I think our gear box should be fine. Our main mentor loved the idea of putting a guard on the chain, that will come out sometime tomorrow.

[Hawiian Cadder]

a 35 lbs arm that is longer than a foot to its center of mass will be a problem for that bane bots. i would recommend some more reduction. ex, our wrist is similar, but weighs 15 lbs and the torque of the the gear setup powering it is well over 130 ft lbs.

[Creator Mat]

Originally Posted by MattC9

Thanks for all the replys, they have all been great. I took this picture right after we put the sprocket in and now it does have a 2nd point of contact. Our arm is a 4 bar linkage with a 30in "finger" on the end of it and it weighs about 35lb, so I think our gear box should be fine. Our main mentor loved the idea of putting a guard on the chain, that will come out sometime tomorrow.

I would be careful on relying on the p60 gear box for that application. You said your arm is 35 pounds, well if that is true any time the center mass of the arm is greater than 1 foot away from your pivot point. The gear box is at a significant risk of stripping its inner gears.

Torque= Force X Distance
35 ft-lb=35lb X 1ft

[MattC9]

Ok, quick update we kept the whole arm as our 30lbs with holding allowance, and it only weighed 22lbs!! Including the supports. So the p-60's were only lifting about 20lbs.

[Gdeaver]

I wonder if the banebot people monitor this forum or is it too much for them to endure.

[DonRotolo]

Please let us know here how that gearbox held up in competition, we're interested.

[MattC9]

The gearbox took competition like a boss!(after adding a new reduction stage and a 30t sprocket on top) We had no problems at all! It was a great year!