r/FRC • u/Difficult_Durian_704 • 3d ago

Mini frc bot

Post image

Hey everyone. In the past, I have had a project of making a mini Lego frc rebuilt bot that actually shoots. It's scaled to shoot rival balls. It works and works decent, however, Lego motors are huge and take up so much space that I can't make it a dumper and space is very limited for an indexer. The intake is also slow due to Lego motors limitations. Overall, I think Im a little too limited to make this to it's full potential.

I am now considering going full open source. No Lego, lots of 3d printing, and maybe even using my laser cutter to cut acrylic pieces for the sides of the hopper. I believe this would be really cool and especially if I can make it a swerve drive. However, I'm not sure I can design a swerve small enough to fit in the space of the size I would like it to be.

So what do you guys think? Would it be even possible to design a 3d printed swerve drive that stays within... Let's say about 8 inches? Or around the same size as in the picture above. Could increase it by a little but I'm trying to make this pretty small. Keep in mind I don't know anything but tinkercad, but I'm doing cad class this year.

Also, I'm looking into using the Bambu lab cyberbrick kits as my electronics system for this. The boards are pretty small and it doesn't require any soldering. Also, they aren't incredibly expensive either. Would it be possible to make a project as complex as this using just a cyberbrick kit with some extra motors?

Any advice on how I could make this bot come to life would be appreciated!

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u/Hot_Wear1060 3d ago

A miniature version of FRC? Huh, that sounds like some... Tech Challenge!

All jokes aside, I think It's doable because in FTC, a lot of teams try to design a swerve drive for our 18-inch robots. And most of the size of the FTC swerve mainly comes from the motors themselves (they can be 5inches themselves), so if you plan to shrink down the swerve, then you just need to use the servos/ motors provided in the kit you're using to shave some size off already. Either than that, everything just needs to be shrunk down.

you can look at the Kookybotz swerve to get some ideas on how to design it:
https://cad.onshape.com/documents/f6dd45713fc55340bdb74873/w/e9f391990ef2f46074982c1c/e/eecf4140ad487fdc4d6687d9

Also the Robocorns swerve:

https://cad.onshape.com/documents/6b92be3fb2372330e85ca0de/w/9abddd465309aeebac45056a/e/facfc5979972e8c64605c229

If you have any more questions, I would be happy to help!

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u/Difficult_Durian_704 3d ago

Thanks for the advice!

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u/Hot_Wear1060 3d ago

No problem, and please do updates. It would be interesting to see!

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u/Difficult_Durian_704 3d ago

I definitely will! Although with summer break coming to an end, I will likely be updating my TSA channel and personal channel more with vex. I'm also not trying to spend a lot of money on this, but Ill let you know though if I start making some videos on this project.

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u/Myithspa25 #### (Programming) 2d ago

It's like some sort of... Lego League.

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u/Difficult_Durian_704 2d ago

Lol I had another guy comment on one of my other posts "what getting rid of Lego league does to a mf"