Reveal video for Genome Kappa, the 2018 Triple Helix robot.
Great work! What exactly is that car for?
Mentor recruiting tool. It’s a real conversation starter.
Complete build thread here.
Awesome! Looking forward to competing with you guys in Haymarket and Portsmith
(And then Rumble)
We were greatly inspired by your intake prototype video; thanks so much for posting it!
We too looked at 1114’s 2015 design for inspiration, but found that we couldn’t get it to work very consistently with short sided power cubes. Did you guys solve that with your final iteration? I didn’t notice any short side intake shots in the reveal video.
How does it handle pulling a trailer?
Nice robot! I really like the polycarbonate intake… not going to lie, we looked at this a few times when trying to prototype our own!
Good luck 2363!
We’re so glad!
One of our iterations allowed for the narrow orientation, but it was complicated and heavy. We chose to prioritize simple and light construction over narrow cube orientation pickup, so we ditched it. We wanted the weight margin available for end game mechanisms. On our prioritized list of robot functionality, doing a triple climb is higher than picking up cubes in the narrow orientation. As it went in the bag, the bot weight is 89 pounds. That gives us 30+ pounds to play with. Once we’re triple climbing, we’ll revisit narrow cube orientation pickup.
I should say that, for us, bag day is just an inconvenient hiccup in the robot development process. It marks the day when our development efforts shift to the practice bot platform. The robot we compete with will likely look very different than what went in the bag.
It pulls a kayak trailer with two kayaks just great. Wouldn’t want to haul anything heavy, but for light duty, it’s awesome.
One issue we are having with the claw is that the power cube’s orientation doesn’t correct itself if we drive at it at an angle. It just sits in the claw at an angle. It could be because our wheels are a bit farther apart than yours. It still works but it would be much better if it corrected itself like yours. Did you guys specifically take that into account while designing that claw?
Likewise. We’re cutting another set of intake iterations this afternoon. Can’t wait to see what y’all come up with.
We did. You can see some tips on designing the needed geometry in the gripper prototype thread we posted.
We also looked at 1114’s design and followed your build and testing. Like you, we decided that consistent contact was more important than the 11" position. So far our driver has been able to adapt and consistently pick up cubes.
Unlike your team, we did not prioritize weight, since we ended up using the 1.92" Fairlane wheels, which weigh nearly a pound each. (!) Grippiness comes at a price, I guess.
Thanks to you and your team for taking the radical openness approach to your design and testing. It helped a lot of teams.
Here is some footage of driver practice on the day before bag day. This is the type of raw footage we shoot and then use for our robot release video.
We’ve gotten some questions about our autonomous modes, and how they work. We have a number of different paths. Which particular path that runs is determined by the robot starting position, the strategy we have for that match, and the field state at the beginning of the match. Here is the matrix of options.
The robot gets the starting position from a 3 position switch, and the mode from a rotary switch, both located on the control panel of the bot.
We would also like to give a major shoutout to team 319 Big Bad Bob up in New Hampshire. Our collaboration with them on our path following solution was a major aspect of our autonomous routines and helped us win the Innovation in Control award at the NOVA district event. @ty and his programming team, thank you.
We used the last of our unbag time last night to install our front loading robot lifters. Got in a couple tentative drive-on lifts before time ran out. We’re looking forward to using them this weekend.
The lifter system, with winches and lifters, weighs in at about 28 lbs, and attaches with 4 bolts.
Couple questions before this weekend;
- Is this double sided, or just capable of lifting one bot?~Null
- If it is one sided, are you capable of sitting towards the end of the platform (allowing another robot to hang on the bar)
- Lastly, why ramps (besides rule of flippin cool!) Over a deployable hook?
Thanks! And look forward to seeing it action!
- It is double sided.
- We could probably sit to one side and lift a robot that was to the center of the platform, under the bar. Probably not advisable, though.
- Strategy: We decided we could easily implement a solo climb, and probably do well at district events. But, we asked which was more likely to be desirable at the district championship or the world championship: a solo climber, or something that enabled triple climbs? We chose to go for triple climbs. We ruled out climbing and lifting another bot as impractical if we wanted a super fast cube placing elevator (tradeoffs). Then we looked at who we would be likely to be partnered with. A deployable hook gets you a triple climb when paired with another bot with a deployable hook. Lifters gets you a triple climb when paired with two rookies (with some driving skill). We felt lifters would get us more triple climbs during qual matches, and would still work well during elims. Then the choice was between side ramps and front loading lifters. We built a prototype front loading lifter, but felt it was too heavy. Between bag day and our week 1 event we built pneumatic actuated side ramps, and installed them at the event. They were ready to go for elims, but we didn’t use them. After observing other side ramp robots at the event and in video, we decided that even if they worked perfectly, they weren’t the right technical solution to the problem, so we scrapped them. We returned to the front loading lifter prototype, and redesigned to seriously cut weight. Fabrication started Saturday, and the lifters were installed and tested Tuesday night. Still remaining is to cut out and install retention/deployment latches.
If you guys got that ramp working, that would be awesome!
We thought about doing it toward the end as a last minute thing- but weight was an issue so that idea faded pretty quickly.
Looks great! Welcome to #TeamParkingLotEndgame