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FLL Quadbot Concept

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Using a transmission, I've designed a compact but competitive robot for First Lego League that can drive 4 powered attachments using just 2 motors. This is a variation of the Orka concept robot. The Quadbot does not have nearly the functionality of the Orka but it is significantly smaller and easier to build.
I have designed a newer version of this and made some minor improvements. I've posted the build instructions on Rebrickable. Please let me know if you are able to build this from the given instructions. It is very challenging.
Build Instructions: rebrickable.co...
Orka: • FLL Into Orbit - World...

Опубликовано:

5 сен 2024

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Комментарии : 42

@chrisjrtr 10 месяцев назад

Watching this design develop has been awesome. I can't wait to see the end product and how it performs.

@bami2 2 месяца назад

Very smart design!

@Skrattoune 7 месяцев назад

Pretty impressive design. Congrats

@miguelangellugo4330 5 месяцев назад

The model is incredible, really congratulations, I would like to see your progress and new emsables, I will talk to my students about your ideas, thank you for sharing it.

@WilliamFrantz 5 месяцев назад

Thanks. I made a few improvements since this video and the new build Instructions are on ReBrickable: rebrickable.com/mocs/MOC-175447/williamfrantz/first-lego-league-quadbot

@user-kw5ci5xk3h 2 месяца назад

Traduzir textos com a câmera How did you do the transmission from gear to gear in the lower red gear?

@blockpartyrobotleague 10 месяцев назад

The compact design here is really impressive. Still not entirely sure how you managed to pack it all in!

@WilliamFrantz 10 месяцев назад

I log a lot of hours in Lego Studio.

@niotoshh-fm8oh 2 месяца назад

The only disadvantage is that you cannot make several movements at the same time.

@WilliamFrantz 2 месяца назад

Correct. That's the tradeoff. Quadbot has twice the number of powered outputs as the typical FLL bot, but Quadbot can only operate one output at a time.

@kimfrancis4674 Месяц назад

Did you use only pieces from the spike kit and its expansion kit?

@WilliamFrantz Месяц назад

@@kimfrancis4674 No, this requires many parts that are not in the Spike kit or the Expansion kit. A full part list and build instructions are available from Rebrickable.

@chrisjrtr 10 месяцев назад

Would you be able to raise up the hub a stud in order to route some of the wires underneath to help with management?

@WilliamFrantz 10 месяцев назад

The problem is the gears. I need to route the cables around the gearbox because I don't think I can route through it.

@chrisjrtr 10 месяцев назад

@@WilliamFrantz I have been thinking about how to manage the wire, doesn't look like there is an easy solution.

@ksgreenlee Месяц назад

how do you use the motor to select which output spins? My son is confused on that.

@WilliamFrantz Месяц назад

Every time the orange ring rotates another 90 degrees, the power shifts to a different output. So at 0 degrees, one output is active. At 90 degrees it's a different output. at 180 it's another and at 270 it's the last one. So you use one motor to rotate the orange ring to either 0, 90, 180, or 270 and hold it there. While it's in that position, the other motor will drive one of the four outputs. You'll need to write a program that first shifts the orange ring to connect the desired output, and then runs the other motor to actually move that output.

@wwvdnbus 5 месяцев назад

Am I right to think that the four outputs can only be driven in one direction?

@WilliamFrantz 5 месяцев назад

No, they are all bidirectional. For some reason I just didn't think to demonstrate that.

@user-wc5ks9ch2i 8 месяцев назад

Can you tell us the steps on how to make this robot? Our team wants to try out this robot. We think it’s a very good idea and think it will be good for us.

@WilliamFrantz 6 месяцев назад

I have (finally) put up build instructions for a similar, slightly improved version: rebrickable.com/mocs/MOC-175447/williamfrantz/first-lego-league-quadbot

@larsbakker6401 5 месяцев назад

Hi I have a problem; My robot pulls slightly to the right when I drive it. Does anyone know how to fix this issue. My gues is that the wheel bearings have a lot of friction

@WilliamFrantz 5 месяцев назад

A bot can drag to one side for a variety of reasons. It might be off balance if it is pushing or carrying something heavy. There might be something dragging against a wheel, like a loose wire. Or it might be "poorly matched" motors that turn at different speeds. In any event, you should use the gyro sensor to correct for all these problems if you can't fix them directly.

@larsbakker6401 5 месяцев назад

@@WilliamFrantzthank you, it was a problem with the motors but we’re nie using the gyro sensor

@tommasogrimaldi110 6 месяцев назад

tutorial?

@WilliamFrantz 6 месяцев назад

I have (finally) put up build instructions for a similar, slightly improved version: rebrickable.com/mocs/MOC-175447/williamfrantz/first-lego-league-quadbot

@legorecrobotics295 7 месяцев назад

Can I have instructions or pictures from the inside

@WilliamFrantz 6 месяцев назад

I have (finally) put up build instructions for a similar, slightly improved version: rebrickable.com/mocs/MOC-175447/williamfrantz/first-lego-league-quadbot

@CosmoII 10 месяцев назад

Hi, can you give the model 3d of the robot 😊

@WilliamFrantz 10 месяцев назад

I would like to but first I want to create build instructions and possibly a few more modifications. Eventually I will put it up on my Rebrickable page.

@svelterhino 9 месяцев назад

Really looking forward to the build, and started following you on Rebrickable!

@roykrikke7775 7 месяцев назад

@@WilliamFrantz That would be really great!

@WilliamFrantz 6 месяцев назад

I have (finally) put up build instructions for a similar, slightly improved version: rebrickable.com/mocs/MOC-175447/williamfrantz/first-lego-league-quadbot

@eliagg18 5 месяцев назад

It's actually illegal in compation

@WilliamFrantz 5 месяцев назад

Do you think so? I'm not sure. What rule might be violated?

@Tactualelf 4 месяца назад

@@WilliamFrantzthe 4 motor rule

@WilliamFrantz 4 месяца назад

@@Tactualelf This bot only uses 4 motors. That's the point of this design. There are two motors to drive the wheels, one motor to shift the transmission, and the last motor to drive the selected out. That's how this bot can drive 4 distinct outputs using only two motors.

@Tactualelf 4 месяца назад

Oh ok that's a really cool design

@pizzapoop 5 месяцев назад

Love the video, i have one question about the design. Due to the drop on attachments, not being secured by anything, would they be suitable for missions on the FLL board that require objects to be pushed down. For example, this season on the masterpiece board, i cant imagine this robot being able to complete the theatre scene change as the attachment would just lift off while pushing down the orange bar, would there be a way to secure the attachments? Hope that makes sense!

@WilliamFrantz 5 месяцев назад

That's a tradeoff for drop on attachments. It can be difficult to "push down" on mission models that require that. However, you could use pins instead of axles. That would make it more difficult to "drop on" but could also provide more connection strength. You could also design an attachment that includes some type of horizontal bolt that you can engage after doing on the attachment.

@ksgreenlee 2 месяца назад

@@WilliamFrantz Being a newer coach, I'd love to see some more attachment examples using this bot for various types of tasks.

@WilliamFrantz 2 месяца назад

@@ksgreenlee I'd like that too. I just recently re-built this bot from the latest set of instructions. My intent is to build some attachments and make another video demonstrating how they could be used to accomplish missions.