2583's Octocanum Modules

[pfreivald]

Originally Posted by AllenGregoryIV

Have you done the math to make sure your modules will actually shift? We are moving to 4 1.5" diameter cylinders because our 4 1 1/16" were having problems. Our setup is different than yours but it seems like you will have a hard time lifting your whole robot.

I don't see why. We lift our robot onto traction wheels with two 1.5" cylinders with no problem.

It's hard to see how much mechanical advantage they have--looks like close to none--but 2 x pi x (1.5 in/2)^2 x 60 psi = 212 lbs; well more than enough.

[Electronica1]

Originally Posted by pfreivald

I don't see why. We lift our robot onto traction wheels with two 1.5" cylinders with no problem.

It's hard to see how much mechanical advantage they have--looks like close to none--but 2 x pi x (1.5 in/2)^2 x 60 psi = 212 lbs; well more than enough.

The issue is that they are not using a 1.5 inch bore. Two 1.0625 inch bore will probably not be able to lift up the robot (and remember to take into account the added weight from battery and bumpers).

[pfreivald]

Originally Posted by Electronica1

The issue is that they are not using a 1.5 inch bore. Two 1.0625 inch bore will probably not be able to lift up the robot (and remember to take into account the added weight from battery and bumpers).

Whoops, must have missed where they gave the bore, and was going by eye. (And not very well, apparently.)

2 x pi x (1.0625 in/2)^2 x 60 psi = 106 lbs, which is well below comfort without a 2:1 or better mechanical advantage.

[Team 2016]

Interesting concept.

[amreuland]

Here is a video of the Working System

http://www.youtube.com/watch?v=fL7d_D83i48

[ferrari77]

Some additional views of the working system

http://youtu.be/TvRj_4lFalo