Holy crap that is actually genius. I didn’t really get it from the shorts but this clears it all up and you sir, from an engineering student, are an amazing engineer.
Awesome dude! Glad that you’re enjoying all my tinkering and iterations as I explore new ways to try and make better systems! Iterative progress as all engineering tends to be :p
@@CrashMakerspaceOne simple question too, whats the thickness in mm? and how wide is it? (im trying to design mine but i dont have a 3d printer yet so using dimensions without knowing the true scale is kinda hard Thanks, cant wait for the next video!
This is literally so insanely awesome; you could give me a million years and I'd never be able to come up with something as integrated as this; keep going friend 💯
This is the best Assassin's Creed blade I've ever seen! I'd love to see this made with metal! The blade would probably need to be made with something strong but flexible.
im such a dummy.... i thought there were bearings in this design!!! this is truly too good to be true! wow amazing work my guy.. you got blessed with loads of talent
Thanks! This was a fun one to derive cause it’s a truly 3 dimensional interaction which varies based on state making it more like a puzzle than a typical mechanism!
Great work man. You've made unbelivable progress with that. I would have never thought of such a construction. Even though it is very difficult to think of this, the mechanic on its own is simple enough that this might have worked in the times of Altair. YOU ARE A GENIUS. I just got one question left. Would this really work? Could this blade be used? I love your work with that. Keep going.
Appreciate it dude! So this will totally work with metal blade. In fact; metal transfers energy better as it has mass so plastic I actually really hard cause friction can over take the mass easily. Basically; the body, locks and blade would be metal; compliant peices nylon.
any word on that sinusoidal design you mentioned in your last short? the one that could theoretically have a spring that spans the whole length of the blade? also, how would a movement of the wrist be able to actually fully extend something like that? or is that why you didn't mention it again?
Yes! That one is still in the works, I really want to make something that is low profile but has that constant tensioner the length of the body. I'm trying to work on a magnetic system to allow that theoretical design to run
As a small scale maker/designer your use of 3D printing for your compliant mechanisms makes sense, but I wonder if you can replace some of those smaller internal pieces with leaf springs. Spring steel is probably within your wheel house, but I wonder if there's anyone out there that can make titanium leaf springs to your specs. Also, once you're done and you feel you have a "ready to ship" design, you should build a mechanical tester for it. I feel like a simple solenoid attached to trigger spring would work. You can just run it constantly until it malfunctions and the iterate on materials with that data.
Leaf springs would definitely be better since it'd cut the width & friction down! And getting metrics on longevity would be awesome I agree. To be perfectly honest I'm not sure I'm there yet with the time I can allot to perfection of my designs (this channel is still derived out of just my time after work lol)
Would it be possible to get just basic blueprints so someone could hand fabricate one? i dont have a 3d printer and kind of dont want one because im more old school.
Go over the blade tip with super glue and metal powder from a bench grinder. Clean it up with a file. Poke a water bottle. You don't need a full metal blade. It will work essentially like an arrow.
I really love this idea, every hidden blade I've printed requires a lot of force to pull the rotational gear and make the OTF mechanism to work. I've found it to be a failure point for almost every design I've gotten working. I'm very excited to print this and add it to my infinite collection of hidden blade designs lmao.
Yea I agree! The sinusoidal nature of the rotary makes it really stiff initially along with them being really thick and bulky hence why I’ve been creating new mechanisms! If ya download the files be sure to check out the Blender file off my laptop too if you want to make modifications as this is still a work in progress
@@CrashMakerspace I've gotten a full set of parts printed, I do have one question. Is there supposed to be something behind the locking tabs to make them want to spring back forward? I'm having an issue where the blade shoots out but just bounces back and doesn't lock in place.
@@DarthRiley depends on the model; the older ones I mentioned the 3mm torsion springs; but if you see pockets under the locks & blade, that is where little 3mmx3mm round neodymium magnets go!
That’s good idea! I wish I had my CNC machine built (I haven’t been able to get some chipsets in stock for it) but that’s make a PET part work much better for demos!
I've been model in blender for a long time and still struggle to make mechanical mechanisms. I figured it wasn't easily possible because blender isn't considered a traditional CAD software, but you seem to be able to make some surprisingly tight mechanisms. Got any advice or good tutorials?
I love it cause I can make literally any shape imaginable while doing it untethered so I can do it very fast. I just keep track of all dimensions in my head while building out my models
Is there any interest in releasing the 3d models so people can print this work of genius for themselves? I mainly ask since it seems you are more interesting in showing people its mechanics rather than just showing off a working one without explanation.
Totally! Patreon - Crash Makerspace on Patreon has my STL files for printing and even my source Blender file right off my laptop so you can customize your own parts or view them in the 3D environment! My goal is to help people tinker and learn so I've got em all up there!
Those thin tabs that unlock the blade, can they be part of the charging tabs that's arent locking into the blade? Just to decrease the number of parts flying around. When I was 14 I spent months make imdepain hidden blade out of balsa wood, took 2 goes. When I finished it, I pulled the string once and it all flew apart and broke and I haven't tried again for 12 years. So good job in sticking with it. Also, no shame in making profit on these models, a lot of work goes into it and you are making a product people want so why not make money off it
Not with this mono layer concept, since the charging hammers move far enough back, they’re out of reach to be part of the same component. And nice job! Making em by hand takes a lot of fiddling to get it right.
Are you still using magnets to engage the locking levers? In my testing, I had the same problem you mentioned previously, where the blade flies right past em, and bounces back. Looks like you're not having that problem anymore - how'd you address it?
I got a little bigger magnets (1mm longer) but it still bounces back sometimes so I’m thinking about assisted locks with compliant tensioners. One thing nice about not having full springs is you aren’t impeding the blade by pinching it at all
I got a little bigger magnets (1mm longer) but it still bounces back sometimes so I’m thinking about assisted locks with compliant tensioners. One thing nice about not having full springs is you aren’t impeding the blade by pinching it at all
I plan to! Currently I’m going through as many new designs as I can until I find something that is really reliable and strong, metal is gonna be expensive so that would be the final build!
Amazing design, I just wonder how strong those locks are. They seem somewhat small considering that they would receve all of the pressure from the blade when stabbing.
They're quite strong! Just looking at compression force, small parts like this are more likely to deform or crack the casing rather than the locks themselves
Hey man!!! This is awesome! I recently bought my first 3d printer and I would like to do this project. But I don't know if the print size is enough. Will I be able to do it with a 220x220x250 millimeter printer??
@@gonzaloburghardt2716 this would be the last one posted on Patreon, pretty sure I say “episode 5” in the description of the post with the files as well
Awesome work! Found you through TikTok. Did you consider replacing the rubber bands with a compliant spring design? Or is the distance the mechanism needs to travel too long for that?
Sweet! Glad that you were able to find my longer-form content (definitely easier to help others learn about the mechanisms with longer descriptions). But you got it! The distance is the issue. The “Elongation Factor” is 300-700% for elastic and more like 10-80% for complaint systems depending upon printing material, so they’re better for small synchronous mechanics rather than energy storage and transmission!
Hiya this looks apsolutely amasing and incrediable and much needed. Im looking into joinging your patrion to make my own but i was wondering two things. Is there any way to make the blade thinner width ways as im hooing to add a crossbow attachment on the top like in assassins creed unity. I am also wondering what print settings you used for printing this including wall width, print speed, layer height and the such. I hope to hear from you soon 😁
Totally dude! Patreon has each of my prototype files used in my Episodes. Hi I prototype 5 and I have a post on there showing print settings. I give my Source Blender file posted straight off my laptop too there so you can tweak it however you want since you have my source work!
Could this same design be used to make a 2 piece blade, ie: a blade that extends in 2 parts, giving more reach and a longer overall blade lenght? Similar to Altair's blades
Hey! I think I might have just responded to ya on TikTok, but I do include a list of the hardware I've been using in prototypes and this video shows the placement of each part (all are visible here as I pick it apart to show workings of it).
Beautifully engineered. You’re a phenomenal engineer and you deserve more credit. Are you open to receiving gifts in a PO Box? I have a less busy summer coming up and I think machining this would be a fun test of my skills!
I have a few questions, im currently trying to make this and the items that are needed are not clear in the blender file. Is it possible I can get a extra parts list of things that are not 3d printed like the pins and screw types please?
I would like to get some parts CNC'd for metal; The compliant components you'd way to keep a good plastic like nylon for longevity. The blade / body / locks would be metal
This is one of my topics to revise in the future with concepts more conducive to metal manufacturing. That will be a big undertaking, but something I'd like to do again
Elastics can last for quite some time-these bands are years old. Elastics have much higher elongation factors than springs. For the other components you’d keep as nylon plastic (non corrosive and impact reaistant) locks & blade would be metal!
@@CrashMakerspace ah thx, I understood the system this time now too, last month I didn’t get the locking and the arms, now it makes sense it’s quite simple the idea a quite effective!
@@CrashMakerspace oh, what would happen if you used metal for the whole thing? To me, most likely the flaps would be harder? And any elastics or could spring also technically work?
@@CrashMakerspace I found it! Do the prototype stab well? I mean... I'll replace the plastic blade with an aluminium one...if I get agressed, can I stab with it, or will the blade go back inside?
@@juventinoaparis the comments on the posts should have parts dimensions; I’m pretty certain it’s 1” rubber bands, and then it has M3 bolts and nuts for assembly (a variety pack off Amazon will do) and 3mmx3mm neodymium round magnets. Just depends on the model you’re looking at on there. But do check the posts comments for more info
You could, you'd need to be super mindful of tolerances to ensure you don't get minding up of the metal parts. The blade is modeled such that it can be milled via CNC. For the body, you'd probably want to keep something like 3D printed impact Nylon
What if you were to make it so that the mechanism wasn't on top of the blade but instead next to it. So that one side operates the pushing and the other side the pulling, letting you have a longer acceleration.
This is similar to another concept I'm working on, the locks tend to get in the way there; I've actually tried having the locks above / below and the chargers on the sides but hasn't been as effective as of yet
Glad you're liking the progress! It's certainly a possibility; it's a tricky mechanism to mass produce with reliability as each prototype needs a lot of fine tuning after the prints
I mean nothing is impossible, but... with the precision of these parts being sub 0.1mm to operate, I'd say pretty darn close to impossible without machine-precision
@@mefriendo7508 go for it! I’d say my earlier mechanisms as they don’t require parts as small as the newer compliant ones! My episode 1 or 2 are probably the best bet to try and create without a 3D printer
You got it! Going from prototypes to reliable product that I can get with reasonable quality is a big jump but the iterative design process will be sure to turn something sell-worthy up!
I’ve never actually done animations! I learned this stuff on my free time and have made static models in blender for a couple years now, but never went into animations portions of Blender functionality!
