Technic tango

Just had alot of fun reading this, and thought I would share a tool I made for my grade 11 final project for making triangles that have whole number sides: Triangle tool on github

Im trying to make a very compact 6 cylinder ross yoke engine with a 9x15 stud footprint for use in my moc, and im wondering if anyone could help me with a linkage for my valves. If you are familiar with the engine, im trying to use the centeral stabilizing rod to facilitate movement of the valves. Here is a detailed video of the situation on youtube: Ross yoke video

Can i do the droideka set 8002? It has the technic logo on the box but i was advised to ask first before undertaking such a project. It has super cool functions and i really wanna try compacting it, perhaps looking at the bakugan mechanism to do the iconic roll and pop up @Jim

Kinda neat how the rotary catch holds the ball joint knob back and forth, pushing the forks back and forth and in turn moving the driving rings. Seems much closer to a real gearbox now.

I built this project as an exe so if anyone wants to try it out they can: https://github.com/mcneds/Trigen/releases

This tool Includes all possible unique orientations of right triangles, and a portion of scalene ones that arent necessarily right angle triangles by subtracting and verifying it is scalene. All sides are whole numbers. I didnt add a button to change the range from the current 1-10 but its in the first couple lines of code so you could change it yourself if you wanted to. Code: https://gist.github.com/mcneds/d6bd36ac808970184bb0c6295acc902c Demonstration: https://youtu.be/TkhLsFSIIME

whats the best pneumatic tubing for lego swtichless lpe? every "silicone" tubing ive tried hasnt been soft enough that going switchless is more efficient than switches

Showcase

Used it with 2 buggy motors and 2 buwizz with 15:1 gear ratio around my rock garden with no issues until the buwizz died

Well if you take a look at the original u joint, it isnt supported either because it tends to be strongly supported on its other side when you use it. The only weak part is the drawback most custom hubs have: the actual connection point isnt restrained to slide off like a normal hub. Heres how im using the hub, the construction is exceedingly sturdy: So because its supported at the steering pivot, it doesnt need anything there cuz i left it to who is using it to design that part to their needs.

i finally figured out how to embed pictures actually in the post so it shows them yayy

I made this for a project where I accidentally built the axles 4 studs too wide on each side so with this I'm halfway there if i use this hub and the landrover rims. here's the link to the video

Possibly micromotor from cada? _____________________________ different post due to merging Im making a bogey with self contained suspension and steering, but due to lego axle torsion there is alot of play. I attempted to add sort of a steering lock here with the pneumatics but that would make the suspension not work and it would introduce bump steer. Any thoughts on how to add a lock here? Bricksafe image

Ive tried a few times and it never really worked for me. I was also thinking that since im printing i can use fasteners that are inset into the corners to generate the pressure instead of glue to make things easier

There are a couple sources to get modified parts but 20$ although sensible for the time required to mod, isnt really justifiable for me, and whenever i try it myself it never works out. Ive been toying with the idea of making 3d printed pneumatics that already have lower friction requirements to move, and have wider ports. What im struggling to overcome though is what to do about the nature of 3d prints. The surface finish may look smooth, but it definitely has substantial friction to it when rubbing other parts and if i smooth it with sandpaper then i lose my tolerances. I have not found anyone else trying to do this or anyone else selling ready made lpe valves that are injection molded, likely because so few people want them. Any insights to making something like this would be appreciated because im stumped on how to make a valve design like lego's work in the same or similiar form factor.

Theyre tatra suspension arms so it just needs to oscillate on the same axis as the springs. It is about. stud off axis but i cannot see any visible bending or bump steer when manually compressing and steering This looks super useful and way easier to implement, ill take a look at this

I was also thinking about putting a hall sensor on the base and a magnet on the plunger but i dont know how the clashing magnetic fields here would work out. Ive seen game controllers having them fairly close together so maybe they just have magnets with a field perfectly fit for the distances between things

Im trying to make return to center steering with pneumatic pistons due to not being able to use LAs or servos in a particular location. has anyone ever needed to "know" where their pneumatics are? I thought about using a spool of string attached to the end and a potentiometer on the axis of the spool to get a reading of where it is, but maybe there's a better way, with or without electronics. here's my driven, suspended, and hopefully, steered bogey I am trying to implement this on:bogey picture

If you look at the rear axle on this set, you can see the way they have it set up with current pieces is impossible. This is because no matter how you place cv joints or u joints, you cannot get it into a the space provided with 5l beams. I think we may be getting a non planetary version of the racing hubs and a double sided male cv joint, or 2 new shorter ones to fit within the space they have used. Here is a link to the picture i am referring to:Ford gt partially assembled

Hmm so he models every part in cad first? Thats alot of effort! That is a very different approach than what i had thought one may take. I do have a fair bit of experience modeling in fusion 360 so i will take a look at this program. Upon further inspection, if one were to use a 3d pdf software, there would be no benefit over the other to design every piece from scratch. Marthart ive found, through some digging, has a very profound engineering background and likely wasnt aware of lego designing programs as his first 3d instruction was made in 2012, just 1 year after ldcad wad made. I saw this, which is a toon shader in blender so im thinking someone could make one for studio itself, or just simply apply it to the parts they want in the collada in blender itself. Alot of work, but it should be functional and feasible for someone with lesser technical knowledge. I tried finding something like that but i was searching for variants of instructions, and decided to post here since i intended on using it for technic and my only reference was a technic creator.

What I want to do: Create a 3D pdf instruction for my now, wip ponsse buffalo dual. What I know: This creator here is the only known person (to me, after much research) to have made 3D pdf lego instructions and there are some things I can infer or have gathered. 1. He is using adobe acrobat, and every piece is its own mesh, individually textured. This leads me to believe they are meshes exported as colladas, which are akin to fbxes which are both just a collection of textured 3d objects. 2. I would need to seperately export a collada for each step, and identify which pieces have been added in each step. This is where I am lost. I feel like there must be a more efficient way to do this. His 3D pdf file is hardly over 10mb, from what I recall, which is much less than what one would expect from so many bundled meshes. There must be a better way that i do not know of. Secondly, the issue of defining what pieces have been added. In lego instructions, they have red outlines around each newly added part to help them stand out from the others. There are two ways I can see being able to do this: The first, and arguably more complex way, is to create a custom material in studio for every colour used in the model for it to have its own outline when exported for each step. The other alternative i can think of, is longer and more tedious, but probably easier to figure out. First one would put the collada in blender, isolate which meshes in the collada are new, and apply a node texture that creates coloured outlines. (I dont know how this would be done but someting this simple should definitely be possible with blender's node system). I hope I have made my situation clear, and any insights would be greatly appreciated.

How would one create 3D pdf instructions? I saw this one moc on rebrickable Here that used adobe acrobat. Did this person manually export a mesh for every step or is there a method to do this with blueprint or ldcad that im not aware of?

The reason the ends arent frames is because of the 12t to 24t gearing needing to be placed between frames, and more importantly, the tatra suspension would have to be placed in the center of the frame. I have made the replacement strong enough to not warp under immense force so i think it should be fine. There is no shifting of any parts under load across the whole model so far

Is this what you meant? It works pretty well.Deployable tracks demonstration

one axle pair is about 1kg so x2, the gearbox is 400g with 2 buggy motors, 2 buwizzes are 130g and I will also be having a powered up hub, 2 pu l motors, a pneumatic crane, 2 more buggy motors for a large pump (can supply pneumatics for the linkage) and body work so I estimate maybe 4-5kg