Chief Delphi - Summer Design Competition 2015

Quote:

Originally Posted by z_beeblebrox (Post 1495505)

Will you (or the winners) share information about the winning submissions?

http://www.chiefdelphi.com/forums/at...d=14417774 77
http://www.chiefdelphi.com/forums/at...d=14417795 68

I'll cover a few of our strategy points first off:

We quickly identified that we would want to be an offensive robot, and that running our match in a series of cycles would net us the most amount of points.

To aid in the process of clearing the quaffles, our robot would shoot the balls from behind the goals, as the balls would land closer to our alliance zone.

Shooting while in contact with the goalpost (or near it), would eliminate accuracy issues, and would speed up the process of lining up.

Dedicated full court shooting was considered, but ultimately dropped due to the limited number of quaffles at the human station, and due to the added complexity.

The snitch would be a great bonus, but ultimately, basic points need to be put up for the snitch to have any value, so we decided to fill that role.

This was the robot we created to satisfy those design points:

Drivebase:

A simple 6 wheel west coast drive. Single speed, single reduction 6 cim gearbox, geared for ~17 fps (theoretical). With more time, bumpers would have been added due to the physical nature of the game.

Elevator:

The whole point of the elevator was to have the ability to shoot quaffles near the max height (10 ft). This would put our shooter right behind the goals during teleop, and would allow us to blast the quaffles through, hopefully back to the other side of the field. It would also aid our ability to shoot from the keeper zone during auto, as we would likely be able to shoot over defense. It's a single stage elevator, cable driven by a bag motor on a 49:1 reduction on a versa planetary. With more time, we would have used rs775's, and incorporated a mechanical brake in the elevator system, so we wouldn't stall the motors. A simple polycord system fed the quaffles into the shooter.

Intake:

Well, it's pretty obvious, but this intake was heavily inspired by 973's 2012 bot (https://www.youtube.com/watch?v=p0_YOm5fjC8)
We saw this style of intake to be very effective in collecting quaffles, and did not demand accuracy from the driver to use.

Shooter:

We decided on a two wheeled shooter, mainly as we didn't want the backspin of a single wheeled shooter when shooting across the field from behind the goals. The shooter consists of two 6 in wheels powered by two rs775's on 3:1 versa planetary reductions.

Team 955 would like to thank the design committee for releasing this wacky game. We used this as an opportunity to teach cad to incoming students, and to practice strategic analysis for the upcoming season. Due to a larger focus on teaching, many parts of our robot (the shooter, holes/bolts, polish, etc.) weren't as fledged out as we would have hoped. Ya, we know that shouldn't be an excuse ;).

Just curious, but does anyone know how many submissions there were?