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LEGO robots & mechs by Chobbybots

Building LEGO robots and mech-suits has been a favorite pastime of many LEGO fans. Robots and mechs combine the mobility of the human body, the power of machines, and the sophistication of technology. And, they are a perfect match for LEGO. In fact, LEGO themselves released lots of robots and mechs through the years; the LEGO Exo-Force, LEGO Bionicle, LEGO Hero Factory, and LEGO Mixels collection from the past, and many of the recent LEGO Ninjago, LEGO Nexo Knights, and other sets and themes offer plenty of examples for building LEGO robots and mechs. 🙂

In fact, if you want to start out with mech-building, the best way to begin is to select an official LEGO set that includes a robot or mech that you like, and use that as a template for your own designs. First, you may just customize the original set by adding some additional details, changing out colors, or modifying some functions. As you become more familiar with the building techniques required to build robots and mechs, it will become easier to build your own models from scratch.

Buying official LEGO sets with bots and mech has another great benefit; you will accumulate a good selection of parts to build your own robots. Pieces for joint movement, mechanical details, tools, weapons, and all kinds of greebly bits all help to make an awesome mech. Once you tried out a few sets and have a decent selection of robot-building parts, you can also look at what other LEGO fans are working on, and get ideas and inspiration from their models.

One LEGO fan who consistently builds excellent LEGO robots and mechs goes by the name Chubbybots. He not only build excellent mechs himself, but also share instructions and tutorials for many of his designs. I particularly like that he offers alternate builds for official LEGO sets. This means that if you own that set, you will be able to build the alternate design without much difficulty or the need of extra parts.

For example, Chubbybots offers instructions for turning the #70612 LEGO Ninjago Movie Green Ninja Mech Dragon into a mech suit for Lloyd. And there are alternate instructions for many of the other LEGO Ninjago and The LEGO Ninjago Movie sets as well. LEGO Nexo Knights is another theme that Chubbybots often uses for alternate builds. And several LEGO Creator, LEGO Mixels, and LEGO Super Heroes sets also get a makeover.

Chubbybots mostly shares instructions via his YouTube channel, where you can watch tutorials, and follow along with the building steps for alternate models and other custom projects. Chubbybots is also very active on flickr and Facebook (just follow the links), where he shares many other robot and mech models, instructions, and tutorials. In the playlist below, I’m including some of the tutorials, so you get a sense of what they look like.

Building along with another LEGO fan who is an expert at mech-building can greatly increase your skills and accelerate your learning. Once you copy a few of their models, you will be well on your way to start building your own designs. Again, you can just start by picking a custom model that you like, and use that as a template to begin with. Pretty soon, you will be able to build your own bots and mechs without following instructions.

As far as currently available sets that would be great as starters for robot and mech building, I would recommend taking a look at The LEGO Ninjago Movie collection. Sets like the #70613 LEGO Ninjago Movie Garma Mecha Man, the #70615 LEGO Ninjago Movie Fire Mech, and the #70632 LEGO Ninjago Movie Quake Mech would be great options. Also, you may look at sets like the #70920 LEGO Batman Movie Egghead Mech Food Fight, the #76077 LEGO Super Heroes Iron Man Detroit Steel Strikes, the #76097 LEGO Super Heroes Lex Luthor Mech Takedown as mechs that could be repurposed for your own designs. As long as the parts are good for bots and mechs, it doesn’t matter what theme they come from. Also, almost all of the LEGO Nexo Knights sets come with some kind of mech.

What do you think? Do you like to build LEGO robots and mechs? Did you find any interesting designs from Chobbybots that you would like to try out? What other tools and resources do you use for building mechs? Feel free to share your own tips and tricks in the comment section below! 😉

And you might also like to check out the following related posts:

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Brick Breakdown: LEGO Elves Queen Dragon

(Written by William)

The LEGO Elves sets are known for their beautiful and magical color-scheme and fantasy elements, but they also provide some interesting building techniques that are worth discussing. When the first LEGO sets with mini-dolls were released back in 2012, they were built quite simply, and there was not much to talk about as far as techniques. This made sense at that time, as LEGO was trying to attract a new audience of young girls who were not familiar with LEGO. Since then, the LEGO mini-dolls line branched out to several different themes (LEGO Friends, LEGO Elves, LEGO Disney, LEGO Super Heroes, etc.) with enthusiastic fans who were now ready to tackle more sophisticated projects. Since I was very pleased with the previous LEGO Elves sets I had a chance to build, I thought I try another set from the collection. This time, we will be discussing the unique building techniques in the #41179 LEGO Elves Queen Dragon’s Rescue that was originally released in 2016. 🙂

The main attraction and largest build in the #41179 LEGO Elves Queen Dragon’s Rescue is the queen dragon herself. While building it, I did not feel like anything was compromised or dumped down to cater to a younger audience. I even remarked to my wife how I thought the dragon was more aesthetically pleasing than the early LEGO Ninjago dragons. That’s not to say that either of them is better or worse, it’s just that the Ninjago dragons more focused on action and play-features, whereas the LEGO Elves dragon had a more finished and gentle look to it.

ROTATION TO LINEAR MOVEMENT WITH LEGO

While building LEGO sets you may have noticed that most action and play features start out as some sort of rotating element. There are of course exceptions, but chances are that you will need some sort of rotating component to incorporate action features. This could be a fully rotating piece like a propeller or revolving door, or it could be a hinge that allows something to swivel. Rotating pieces are particularly efficient in providing some kind of action when space is limited. And we may not even need the full rotation of the piece to make an action feature work. For example, we may want something to move horizontal or vertical and the best way to achieve that is by using a rotating piece to initiate the action. The #41179 LEGO Elves Queen Dragon’s Rescue offers two examples of how we can achieve this type of motion.

To exemplify horizontal movement using a rotating piece, let’s take a look at the lava flow in the #41179 LEGO Elves Queen Dragon’s Rescue, where a few magical bits are floating in a stream. The initial motion is provided by a rotating pillar, but how does that circular motion turn into a straight line?

First of all, we need some sort of arm, that connects directly into the turning mechanism to help define the distance we can push/pull something. However, this alone is not enough. If we were to connect the floating lava stream to the arm, it would simply move in an arc rather than a full circle or a straight line. Therefore, we need some way to connect the arm to the moving piece without messing with the element’s direction. For the lava flow, a second arm is used to make this connection. By adding two additional joints, the arc motion is absorbed. The last step is to create a channel for the element, so that the motion is directed. A few bricks later, and you have something that moves left and right.

The same principle can be applied to vertical movement as well. The tower has a large glass window and fence section that can be moved up and down by a lever. The lever starts by rotating, and we once again see the arm that is attached to help define the distance. However, unlike for the horizontal movement, this time gravity is used as the connecting element. Since gravity forces the window to fall, it has to touch the arm. The only trick left is to make sure the arm will always touch the window, which is done by a specific angled connector. The window is then placed in a well-defined channel and it’s done. In the video below, you can see both functions built and demonstrated.

JOINT RESISTANCE WITH LEGO

If you regularly build large LEGO animals or mechs, you know the challenges that come with building movable joints. They need to be light enough to hold up their own weight, but also sturdy enough to not fall apart. Besides juggling the balance between movement, weight, and fragility, there is another technique you can consider; adding resistance.

I was in the midst of building the body of the queen dragon when I noticed there were four axles coming out of the main frame. This was odd to me, as they looked like the type of setup used for attaching wheels when building cars. Things got even more interesting when each axle got a ball-joint, indicating that we are definitely building something with a lot of movement. But then the ball-joint receivers were clipped on, and something strange happened; the ball-joint receivers got locked into the frame. I started thinking, “Why go through all the trouble of creating a moving component and then lock it in?” But then I realized that LEGO designers used this technique, not for posability, but to add resistance for the rest of the axle that stuck out. Sure enough, the axles eventually got connected to the dragon’s legs. All of this added the necessary resistance to let the dragon strike interesting poses without falling in on itself.

Adding resistance is not a new concept for me. I know if I use a clip and bar connection, for instance, something could easily move, and if I add a whole series of clips and bars the movement would become much stiffer. However, this was the first time I saw a single piece used primarily for a secondary characteristic it just happened to have. You look at a ball-joint and tend to think about the wide range of motion it can provide. It won’t cross many people’s minds to think that it will offer a lot of resistance. But, that’s exactly what’s done in this set. The downside of this technique is that it needs a decent amount of space to build it properly. However, most models that require this amount of resistance will likely be quite large anyway.

APPLYING WHAT YOU LEARN

I have to admit that I’m terrible at figuring out how to make things move a certain way. This is why I really liked how the #41179 LEGO Elves Queen Dragon’s Rescue provided two interesting ways that I can learn from. The concept used isn’t hard to apply and, by doing the same thing in two different ways, it shows the inherent versatility the technique has. Hopefully, you find it to be useful as well.

As far as using resistance when building joints, I wish I knew about this technique sooner. I built a large figure for the first time, and had all sorts of issues making the arms work. The legs were even worse, so I ended up making them solid. Now I see that by adding resistance, I can make a much more reliable figure without having to give up anything (apart from the interior space needed for the technique). Generally, this technique is going to be most useful for large figure sculptures, but you might also consider it when dealing with an element that wiggles around too much and needs some added stability.

If you want to experiment with LEGO Elves dragons, the #41179 LEGO Elves Queen Dragon’s Rescue is no longer available directly from LEGO, but there are some other LEGO Elves sets with large dragons you can check out under the LEGO Elves section of the Online LEGO Shop.

What do you think? Have you run into the techniques discussed here in other sets as well? And did you use them in your own creations? Feel free to share your thoughts and discuss in the comment section below! 😉

And you might also like to check out the following related posts:

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