pic: Unique drive concept

[Madison]

Originally Posted by rocketperson44

The redesign has a feature that should compensate for this. The turret looks something like this now.

The spring (if gravity isn't enough) will push the center platform down up to 3 inches when lifted off the ground by ramp or defensive robot

This may also require that the turreting mechanism be able to pivot relative to the frame, as well -- and the diameter of your turntable will still considerably limit the maximum angle you can climb.

[Brandon Holley]

Originally Posted by rocketperson44

Great idea, i'll experiment with this when I make a prototype.



That was the plan for turning.



The redesign has a feature that should compensate for this. The turret looks something like this now.

The spring (if gravity isn't enough) will push the center platform down up to 3 inches when lifted off the ground by ramp or defensive robot The result will look like this:

how about adding the suspension to the omniwheels at the corner.....saves some complexity dont you think?...

just give yourself enough ground clearance with the frame

[Cartwright]

I know that a lot of robots that have crab drives or omni wheels can be moved rather easily, but how easily do you think this could be pushed around?

[EricH]

Originally Posted by Cartwright

I know that a lot of robots that have crab drives or omni wheels can be moved rather easily, but how easily do you think this could be pushed around?

Crab drives are much harder to push than omni wheeled drives. (Just ask 118 and 469.) It's a crab, so I don't see much of a problem with it holding its ground. Then again, it might decide to run away and go around the defense.

[Jeremiah Johnson]

Originally Posted by EricH

Crab drives are much harder to push than omni wheeled drives. (Just ask 118 and 469.) It's a crab, so I don't see much of a problem with it holding its ground. Then again, it might decide to run away and go around the defense.

This is between a crab and omni drive. It's only got one crab "module" so it would be easy to push for the most part, especially if any of the robot were lifted slightly.

[Brandon Holley]

Originally Posted by Budda648

This is between a crab and omni drive. It's only got one crab "module" so it would be easy to push for the most part, especially if any of the robot were lifted slightly.

This has no less traction than a regular 2 wheel skid steer

[MishraArtificer]

Originally Posted by K.Porter

The main difference between Little Red Wagon drive and your design is the placement of the pivot. Instead of having the turntable on the middle, it would be located in the front of the robot, with casters (or omnis) supporting the back. The pivoting drive section in front would simply pull the rest of the robot along, much like, well, a wagon (or almost like a front wheel drive automobile)
I'm sure everyone at 172 would be happy to see our pet design project actually get somewhere, even if it is designed and built by a team elsewhere!

Bad news buddy: Team 240 did something almost exactly like that in Aim High, Triple Play, and according to alumni, almost every year since the team was founded. The only difference is the pivot point was the drivetrain end (front or back, didn't matter) and to do a 180 would swing the entire robot around.
What you're suggesting, if you think about it, will just make the robot do drifts. All. Day. Long.