Here’s an overview of the Us Open for us. Despite being riddled with sensor failures both days of the Us Open and just being a rough tournament for us, we still managed to rank 6th in the creative division. Alliance selections were interesting and kind of a mess. Going into eliminations we went against a decent alliance in the pre-quarters. Both my auton and my partners auton failed the first match and my partners failed the 3rd match costing us those auton bonuses and both the matches. I can not stress this enough, make sure your autons are strong, and RELIABLE. Almost every elimination match was decided by the auton bonus. It did end up being a lot of fun and a well ran tournament. Thanks CREATE!
Now that worlds is right around the corner i’ll release the specs of my bot along with some of the videos from the us open.
Specs:
Drive: 4 motor 1:1 tank drive chained together
Lift: 4 motor 8 bar(double 4 bar?) with in-lift motor mounting
Cube intake: 2 motor cube conveyer capable of 3 cubes
Skyrise manipulator: fold out side claw, 1 for each side.
Capable of scoring all 7 skyrise pieces in ~45 seconds
Capable of scoring 3 cubes at a time on a 7 tall skyrise
Currently tuning a 10 pt cube auton, should be ready by worlds.
Here’s a link to my video journal for the videos!
Shout out to the Math division this year! We are in it
From my experience at least, it seems to be more efficient and less prone to stripping gears and such. It also allows me to mount it at the very back top corner of the 18 in cube. Normally the gear system takes up some of the room on the back. I wanted to make the lift as tall as I could so It could reach the full 7 for building and filling. And its unique so it gets noticed.
Looks great. Your robot would be a strong pairing with Team 1826, who is also in the Math division. A link to their 20pt pole side autonomous is here:
Team 1826 can reliably score 4 poles and a cube in autonomous. Build all 7 skyrise sections in 34 seconds during programming skills. Currently 2nd in the world in programming skills with 44 points. Can score 2 cubes at time, build the skyrise and put on 7 cubes and have time left to score a few more cubes on poles during a match.
I would like to help answer this question, since I am the one that designed the lift.
I believe that the in bar lift helps to achieve higher efficiencies. If you have 2 motors per lift side at the back, all of the lifting force must go through those lower joints before it is actually transferred into lift. Without proper bearings, you’re looking at extreme forces that are on the edge of what the vex design system can handle. By putting the motors in the bars, you spread the forces out, so that they don’t have to travel as far, and thus increasing efficiency and reliability.
Also, I think that it is easier to work on, because on a typical bottom end bar lift, you usually have to partially separate the lift from the bot to access the gears. On the in bar lift, just pop of the stabilizer bar’s 3 screws and you have full access to the gears and motor.
It definitely saves space on the robot allowing you to have longer arms to reach higher, but I’m not so sure about about “spreading out the forces.” It takes the same amount of force to move those long arms no matter where the force is coming from in this case. You’re actually doing more work lifting the motors and gear assembly than if that was all mounted on the chassis towers. But the advantage of longer arms and being easier to work around makes up for it. And it doesn’t look like you’re struggling with lifting force.
Actually, the lift design can handle 4 cubes without any real issues, the intake just can’t do 4 cubes. The longer bars and ease of access are very nice to have.
Thanks, we’ll definitely be on the lookout for you guys at worlds!
