Our drivetrain CAD is mostly complete now. Our frame perimeter is 24” long and 26” wide, although our usable belly pan space is 22” long and 18” wide. The vast majority of it is COTS, but we are having our sheet metal sponsor cut us our belly pan, which features a grid of #10-32 tappable holes (0.159” diameter) at a 1” spacing. This will help quite a bit with electronics mounting, both being able to mount components directly to the belly pan, and also providing ziptie locations if need be.
Our bumper system is a near direct copy of how 2168 and 2791 have done bumpers in the past, and is the same way that 6328 is doing theirs this year - the only difference is that we are using 3x1 tube stock between the wheels, rather than 2x1.
Our hopper CAD is obviously still in the very early stages, but we’re going with a full-width S curve “hopper.” This is very reminiscent of, and very much inspired by, team 2135’s 2021 robot. It’s also very similar to what 4481 has been testing recently. We don’t really have any use for the space on the side of a single-wide hopper, so we’re just going to make it full width and just not center the ball at all. It takes a lot of optimization effort out of either the intake or the hopper (or both), and since we are low goal, we really don’t need an absurd amount of accuracy.
We have the general shape down, but we are still learning more about shooter wheel choice. In all honesty, as a team undergoing a lot of change at the moment, we have not had much time to compare shooter wheels ourselves, so we are paying close attention to open alliances teams to learn more about wheel choice from them - thank you to 4481 and everyone else doing testing.
The hopper is going to go over the robot on the side opposite of the drive gearboxes; this takes up a good deal of volume on that side, which is why electronics are rather crammed together. Getting under it will likely be possible, just annoying, but these are some of the tradeoffs you have to accept when building small.
The climber will go somewhere. This is a “future us” problem. We are obviously hoping to cram it somewhere in the middle of the drive rails, but we honestly have not had the chance to plan that far ahead yet.
Electrical quality has been a pain point for the team historically, so we’re spending a lot of time focusing on wiring quality in preparation for the upcoming season. One of these projects involves wiring the offseason drivetrain we had designed and built a few months ago.
While we wish we could go for 1538 or 254 wiring quality, this is still a massive step up for us and something we are quite proud of. We can definitely improve with some more zip tie square friends and some shorter ethernet cables (or more dedicated zip tie cutouts on the belly pan lightening), but this works and is something we’re very excited about.
We managed to track down a free, used carpet in the area that is about ¼ of a normal field size. This will be a huge resource for us, especially now that we are aiming for higher autonomous capabilities. The fit inside the shop is a little tight but we’ll make it work. We’d like to extend a huge thank you to team 6731.
Our team captains put together this Gantt chart outlining our expectations for build season.
It includes some handwaving; our 2nd robot is likely just to be the offseason drivetrain I’ve mentioned a few times here. We’ll likely stick iterations of our other mechanisms on it in order to test them without compromising the quality and state of our primary competition robot.
Please feel free to reach out if you have any questions. Thank you for following along