Jim

As long as they don’t detach, you’re fine.

It's great to see so many cool entries!

Comes to mind that I can also take a look at the Liebherr for inspiration. That model uses a geared down 20T gear directly on the turntable. I found this example and this is more or less what I am aiming at. A child sized robot, consisting of a base, body and head. And some sort of arms. Of course, my version will be much more rudimentary but this robot does reflect my ideas.

Hi. Please be careful with bumping old topics. Only bump old topics if there is useful information to add to the conversation. Thanks!

That is absolutely fine!

It doesn’t have to be a box, but we need to be able to see the three dimensions. Most people made some sort of 3-axis with liftarms.

Yes, please do that. We did that in the past as well. I will add this to the entry topic shortly.

Personally, I prefer the Technic solution. While the "City" solution might look better, it just doesn't feel right in a Technic model. Have we ever seen something like that? So, is it allowed? Well, I am not really sure where we draw the line. I am inclined to say yes, but on the other hand it feels a bit like circumventing the rules. I prefer you stick to the Technic boom. This is exactly what I mean.

If we can find a way to mount my wheel units, I would love to turn your concept into a robot. That way I can fool around with the software etc. I am sure this robot will have many iterations, so I would love to test temporary concepts.

The 98585 is driving the four 12T gears? That's a nifty solution! Roger that. Hopefully they will be available on Bricklink soon-ish. I am not in a hurry, so hopefully next month or so. Provided, I will need them for my solution. Maybe I don't need them at all. But I would like to have some in my collection.

That is one fine looking base (and upper structure). I can mount my wheel hubs to it and I will have a perfectly fine robot Using the 98585 pieces is what I have in mind as well (between the wheels and the motor, there is 1L space). I probably need another coffee, because I am not entirely sure how the motor and 98585 are driving the black ring. I would love to see the Studio file. All these posts are really helping me out and I am enjoying them a lot. Where can I get the new 12T gears? They are not on Pick a Brick and it's not currently listed on Bricklink (if I am not mistaken).

That is indeed something I have considered. But given the potential weight of the robot, I would like the number of gears between the motors and the wheels. I have also thought about a solution with two tires per "wheel unit" and a differential in between, so I can drive the differential with a 20T gear. Having unlimited would be very cool, although not necessary. Two motors might be overkill, but I'd rather have some extra power than not enough power. From what I understood the Large Angular Motors aren't that strong, so having two per wheel feels like a safe bet. Hmmm Big Red. I totally forgot about that one. I do prefer your design over a gazillion 1x1 round tiles. Will it be a strong? I will download the instructions for Big Red and take a look. Thanks. And please post a WIP for your robotic arm. I always love to see robotic arms. And I am interested to take a look at driving the inner turntable. Are you using a worm wheel or a gear/gears? I reread your message and you mention 4x 12T gears. I would like to see a pic of your setup.

True that.

That is a very cool creation. To be honest, I think you will be getting "this one is better than the A-model" a lot

I guess they will be tricky to brace. But I did consider turning the wheel assemblies into "tubes" using lots of them.

I thought about that, but given the potential weight, I do think it's better to drive the 11x11 curved gear racks. I could use a worm wheel on the inner turn table, but then it would be better to use the old turn tables. They work better with worm wheels. For now, I will try driving the big ones. I'm sure we will. Please create a WIP topic if you have some design concepts or whatever. I'm interested to see what you come up with. Hmmm, that is actually an interesting thought. A very interesting thought. I automatically went for a four wheel design....just because. I started with a 3-wheel triangular design for my V1 robot. That didn't really work out. Partially because the triangular design resulted in a lot of stress on the omnidirectional wheels. And partially because I wasn't comfortable with building a triangular shaped base. But for this design, it might be feasible. I don't necessarily need to build a triangular base. This is the reason I am posting my concepts early on. So people with more experience and insights can give me tips like these I will give this idea some thought. Yes, indeed. True that. I actually considered placing the rings below the middle of the wheels, but I quickly dismissed that idea. I can indeed play around with the vertical placement of the center turntable. I am not entirely sure how to brace the two rings. I figured using the center turntable, so it won't fall off, but that will probably not be enough to brace the rings themselves. Maybe I will try a solution like Mr. Jos used. Not sure yet. Absolutely. I have placed them in my Stud.io palette and I will definitely be using them. Cool. And as always; don't hesitate to question my questionable decisions

I am aware that the bracing is insufficient, but I am trying come up with an initial design and iterate from there. And obviously, this will be easier when I can build it physically.

MINDSTORMS BIG ROBOT V2 INTRODUCTION Recently I posted a topic about the End of a Reviewing Era. More details can be found in the corresponding topic. In this topic I mentioned that I was planning on picking up building Mindstorms. A while a go I started an Omnidirectional Robot project, using EV3. I have been working on this project on and off for several years. Of course, more off than on hehe. Some issues I had with this project: Difficulties daisy chaining with the original software Python on EV3 boots very slowly (a couple of minutes) Replaces EV3 hubs with BrickPi's BrickPi solution wasn't easy to integrate into the build Bulky design Lots of non-LEGO parts Etc When Spike Prime was released I wasn't very enthusiastic. You can read more in my review of Spike Prime. After the release of the Robot Inventor (see my review here) set I got really interested in the new hardware. The new software works like a charm and has the possibility of broadcasting messages to other bricks (this basically replaces my needs for daisy chaining multiple hubs). I have been in contact with Laurens Valk quite frequently this year, so I got really excited about Pybricks as well. I decided to start working on yet another big robot. Making a big robot, possibly humanoid-ish, child sized, is kinda my dream project. My Magnus Opus hehe. Since I hate the color scheme of Spike Prime, I decided I will use the Robot Inventor color scheme, black and white with Teal (Dark Turqoise) accents. Currently I have four large Technic Hubs and two of them are in Teal. I can use the other two as well, but when push comes to shove, I will replace the yellow ones with Teal ones, unless they will be mounted somewhere internally. I have no clue. what the robot will look like or what kinda functions it will have, but I will start building the base. This will be challenging enough. When I am happy with the base, I will contine with the upper structure. First things first. Some criteria I have in mind: Color scheme is black, white and teal 100% LEGO Software written in blocks or Python (using the official software or Pybricks) Using the big BMW motor tires (I already ordered 4 on Bricklink) ... I am enjoying Stud.io (or Studio) more and more these days. I was hardcore LDD user, so I was disappointed that I can't use it anymore, but I am starting to like some of the features of Stud.io. Whenever possible, I will share some concepts drawn in Stud.io. DESIGNING THE CONCEPT Since my physical bricks are still stored due to our renovation, I had to start digitally using Stud.io. I came up with this as my first concept (the final version will obviously have four wheels). I will be using two motors per wheel for propulsion and one for rotating the wheels. This means three motors per unit, which boils down to using a single big hub for one side of the robot. Having two teal hubs, this will cover driving the robots (two hubs, 12 motors). Unfortunately, there aren't any extension cables, so I have to be careful with the placement of the motors. I will place the hub in the upper structure, between both wheel units. The left version will most likely result in not having enough cable to reach the hub. So I have created the second version, which will probably suffice. @Mr Jos was kind enough to send me instructions for his 6 Degrees of Freedom crane. The image below is how he solved the gears. I will probably use a slightly different approach, but I really do like looking at his solution for inspiration. I also downloaded the Bucket Wheel Excavator instructions, but I am not sure whether they will help me a lot. I am glad that we merged Mindstorms with Technic, so I can post it here without scrupules. As usual I would love to hear your opinion. Do's or don'ts. Hints or tips. I am not an experienced MOC builders, so any help is appreciated.

Hi. I merged your topics. You can continue posting progress in this topic

That isn't considered cheating. You need to fit the model without taking things off. But you can position the boom/bucket etc any way you want.

@Brickhaus I have seen the 4-port hub work with the train remote. I you experience problems, you can create a dedicated topic.

That is more or less the same in The Netherlands.

That’s an interesting thought. I like the idea.

I have seen a lot of people “complaining” about the lack of functions in Technic sets. Maybe we simply need to build something with as many functions as possible.

Nope, it doesn't. Hehe, I guess you are. But I will look into a topic collection tool. I have written my idea in a previous post. Like the frontpaging tool. I can scan topics for tags or prefix in the title. When a topic starts with [ROBOTICS] (or another chosen designation) the topic can be added to an index topic. That way we have a solution more or less like the one you are proposing. The collateral advantage is that we can do this for [TC21] as well.