448X, 21S, 6671X, and 1437Z RI3D Reveal

Was there a specific way that you rubber banded the tray to make it flip out from fully parallel. I have been trying to build something similar but so far it only pulls if it is already partially up.

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I think the best way is honestly just to try different amounts of rubber bands and see where the equilibrium point is . We didn’t band it in any special way, just straight banding.

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are you guys planning to use a variation of this robot with some of the mechanisms you described but had not yet implemented, or are you planning on using something different for competitions?

and sorry for all the questions lol…what does the tray that holds the cubes rotate on? It looks like two standoffs are connecting to something that is rotating, but what did you use to allow for that?

The RECF in their infinite wisdom banned 448X and the rest of us have graduated, so we’re not planning to compete at all with this. It was more to use the parts we already had and to hang out and have fun than to make a competition ready robot.

No worries! The unfolding part of the tray is mounted on screw joints inside flat metal, which itself is mounted on the static part of the tray. We’ll clear this up in the documentary because the geometry can be a bit confusing.


Do you have a rough estimation of when the documentary will be posted?


What is the ratio on the linkage that pushes the tray out?

I thought that was only for Turning Point, and that it wouldn’t carry over to future seasons?


It’s a 7:1 torque ratio on a 100RPM V5 motor.


We’re trying to get the documentary out soon. Jess, who is editing the documentary, has been on vacation and doesn’t have much access to the internet, so my rough estimate would be within the next couple of weeks hopefully.


Nice robot and all but that MUSIC IS DOPE. What’s the song’s name

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Thank you!

The song is the You and Me Flume Remix.


Without further ado, here is the documentary for the 448X, 21S, 6671X, and 1437Z RI3D. We hope this will give some more insight into the build process of this robot, the problems we ran into, and the reasoning behind the various decisions we made. We also put together a written documentation with some more details, which is linked below and in the video description. The link to the GitHub repository is below and in the video description as well. Again, feel free to ask any questions. Thanks!


Writeup: https://docs.google.com/document/d/1HdKqENHWh6WTbPTh926jqvDW3yEPQfKpOuxzz5v5FYk/edit?usp=sharing

GitHub repository: https://github.com/Unionjackjz1/Goofy-RI3D


Great job guys!!
Gonna make sure my teams look at this documentary… there is so much that they can learn from it.

Think this might have the same effect as last season 574C puncher tutorial :slight_smile:


<Insert maniacal laughter here>


Based on what you learned from this bot do you think a one motor roller for a tray stacker would be viable?

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If you read the write up it says they were thinking about dropping the internal rpm from 200rpm to 100rpm so one motor could work but obviously not as well.

It of course depends on how many cubes you wish to intake and at what angle the tray is at. If you do a flip out like this design you wouldn’t be able to do a one motor intake anyways.

The biggest advantage of tray bots over lift bots, to me, is the quicc succ of cubes or cube pickup speed. A tray doesn’t have to stop to pickup a cube, it can continuously go straight and intake. With one motor at 100rpm you sacrifice that which doesn’t seem worth.


I keep having to restate this, but what exactly is making you guys think that a lift, tray, and roller intake cannot go together

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Oh it definitely can, too much effort to type out as well as kinda irrelevant to what I said?

1 motor roller intake would work for a lift with a tray but if you’re going to do a lift putting a tray on it doesn’t seem like the best option.

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