I’ve started brainstorming for this years game over under and I wanted to know if you guys had any ideas on it.
4 motors for the X-drive
4 shared motors
- 2 motors work to power the first stage and the right wheels
- 2 motors work to power the second stage and the left wheels
- power controlled by a PTO system so they can only power 1 at a time
piston-powered claw
this design should last until mid season
1 Like
I was thinking of using a double reverse 4 bar(DRFB). Mounting a claw to the part that expands upwards so not only can we pick up acorns, we can also expand and grapple onto the pole in endgame. I may be a wishful thinker but on the back we thought of using a solid plate to act as a de-scorer. I have no information about expansion rules so this is just stand-alone brainstorming.
I think this year’s game will be more focused on teamwork. Teams will need one robot to collect and shoot match loads while one scores them in the goal. I think the elevation poles will not be utilized to their full capacity till the last half of the season as most teams will focus on scoring the nuts/acorns/Reuleaux triangles.
I am looking forward to this season though I think the one-possession limit is an interesting idea that will make teams come up with new and interesting ideas.
3 Likes
I think that x drives will not be very useful this season as there will not be as much movement. I think robots should be focused on a reliable thrower and a good intake. But who knows we will have to wait until the game comes out!
4 Likes
We were thinking of a modified clawbot idea.
Me and my team made a quick CAD model to get our ideas down. For anyone who doesn’t use onshape here is a picture:
4 Likes
When watching FRC charged-up matches, I noticed that teams with a tank drive took longer than serve drive teams to align themself at match load stations. I believe that this also might be true for Over Under. Also, it protects against pushing by allowing teams to push sideways if they encounter defence.
1 Like
A DR4B might be a little overkill. Maybe only a 4 bar or if you need that extra reach a 6 bar.
4 Likes
I like the design, but scissor lifts (x-lifts) have proven to be pretty unstable. I might recommend a 6 bar or a DR4B instead.
2 Likes
It’s a good design but the only thing is that only one triball/acorn whatever you call it at a time. I do still believe this is what a lot of the less skilled teams will utilize because of its very basic design. Thank you and your team and your amazing design!
2 Likes
One of the things that I believe will be the most important part of climbing is getting your robot as close to the pole as possible. You might want to have your climing mech at a 45 deg angle while not in use then extend it out 90deg and then grab onto the pole and then finally pulling the mech back in, thus this time it will pull the whole robot towards the pole thus lowering the center of mass and putting less torque on the contact points of whatever climbing mech you are using.
1 Like
4 motor 6 bar lift with a 2 piston claw for both elevating and getting the tri-balls. Good Idea?
3 Likes
The strange shape of these game objects is going to be a major issue, I was thinking a large rubber band roller and a linear puncher with a “cup” attached to it. 6 motor drive seems really viable this year, it may even be possible to have 8 motor drive.
2 Likes
Yes thats what were doing
1 Like
I feel that any of the really tall lifts (ex. DR4B, cascade) will be really useful along with a locking mechanism or a “cap” on the post.
Also, if 6-bar, 8-bar, and 10-bar exist, why not a 12-bar lift?
1 Like
If you look at the definition of ‘Elevated’:
I don’t think a cap is a viable strategy.
3 Likes
Whoops. didn’t see that. You are right, the “cap” would be illegal.
5 Likes