Thanks for watching! If you have any questions feel free to ask them below. If you are extra cool and want a epic shirt they are here: www.bonfire.com/store/515r-me...
the safety on everything and overall thought on this robot is insane. Bummer that the most unlucky thing happens to the alliance with the most safe team i've seen.
Great work and magnificent build!!! The way it is made to be so clean and safe is mind-blowing. Always love learning from you XDDD. Wish you good luck on next season and definitely see you at worlds!!!!
Wow! Y'all are a pair of really cool guys! I never got to talk to you guys at worlds, but I can tell just from how you did this video that you guys are awesome people. Thank you for the robot explanation video, there are some things that I'd never think about doing, like the black lines for screws. You guys would make amazing engineers, you guys think of everything, lol. I wish both of you the very best in your future endeavors (even though I don't think you need it). :)
The actual goats. It was so fun to actually alliance with u, and I can confirm the the robot does work…..lmao. Ben and Logan, you guys were so cool and friendly and VEX is going to miss u.
Owen here from 323S, It was awesome competing with you guys this year and getting to know you. Best of luck in your careers! P.S. You guys are my favorite team!
Hey great robot! Just one question about the 8 wheel drive train. How would the robot be driving up hill all game? I just feel that the tiles wouldn’t sink in while you are moving bc they don’t have time to displace. Like running on water. Just a thought lmk what you think.
Hello! Ben and Logan. I noticed that you used a special type of spacers at the beginning of your video for the drivetrain. You said that you got it from McMaster-Carr, but the site was very confusing. Could you please reply with the link? I was also wondering how multiple teams were using IQ chain because it was stronger or something. How does that work in VRC?
A very intelligent man who won 15 straight tournaments once said, “The more you can reduce unfortunate things that can happen, the more likely you are to win.” Revision, you are the greatest of all time 🐐 🐐in my humble opinion. I wish I would have talked to you for longer at worlds, y’all are great guys! Good luck the rest of the way! -Yancey 63031C
What's the diameter and material of spacers that you used on the shafts between the drivetrain wheels? Also it was awesome to see you guys progress over the season. - 9257R (It would also be great if you could link it).
www.mcmaster.com/products/spacers/nylon-unthreaded-spacers/ You want 6mm OD and 4.3mm ID. You can pick any length. I think I got 32mm long which was perfect for just using one spacer.
okayy soo i love you guys and i have one question about the drive train, how do you guys gear that for speed because when we used that gear ratio is went really slow, and we used the standard green cartridge motors!
They used blue cartridges for 450rpm, the green cartridges gave you 150rpm. However 450 on 3.25 is very fast, so I would not recommend to beginner teams
Just curious - is that PTO canti? Why is it fine in that situation? I’m guessing it’s because it already has two points of contact, but I’m wondering if that still adds friction. Thanks, - 6121C
If so, in this case it wasn't under much load and torque at all which allowed it to work fine, and it needed to be out of the way otherwise it touched the discs as they came up the intake. So yes its not in theory the best but worked fine for fixing a problem on the robot.
I believe that is unused code. Our drivetrain code uses odom wheels for skills auto and motor encoder for match play. We occasionally ran into problems with robot position during match autonomous, however it was typically caused by collision between us and the opposing team.
The main advantage we have seen to low strength gears on the drivetrain is size. We originally had high-strength gears on the drivetrain, but were able to slim each gearbox by 0.5" using the low-strength gears. There is a risk of gear slipping, but we did not run into any of these problems throughout Spin Up.
Yea so that was a stage that allowed the roller mech to be geared down more. It was a screw but on it was a drilled out high strength shaft which allowed it to spin freely on the screw but connect the two sprockets motion together.
Bang bang switches between 0% and 100% power, depending on whether the flywheel RPM is above or below a desired target, respectively. Its advantage over PID is that it is simply the fastest way to reach an upwards target speed. There is no lost time from slowing down to stabilize the speed. The disadvantage, at least from our testing, is that it can more quickly overheat the motor and is more difficult to maintain a tight margin around the desired velocity. A middle-ground between the two is Feed Forward, which uses Bang Bang when the flywheel RPM is far below its desired target, but then switches to PID once it is within a certain range. The range from us was 300 RPM below (in 1:1 cartridge units).
The bottom row of screws on the drivetrain are screw joints, connected directly to the drive wheels. This allows the same free-spin as a shaft/axel setup, but with additional structure, due to the screw holding in both C-Channels on its respective side.
@@515Revision That's super cool, so did you choose to have all the wheels slightly lower due to spacing? Or was it for going over the low goal barrier or something?
We don't use any 3D printed parts on the robot. Please correct me if I'm wrong, but I believe you are referring to the white plastic components. These parts are laser-cut Delrin, which fall under 12 x 24 non-shattering plastic sheet.
