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Everything posted by Aurorasaurus
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I'm curious how come you want to use a buggy motor rather than an XL motor, is the form factor whats important? Or the power density?
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Finally, after many tries, I have a completely working prototype with bearings! So, lets talk about what changed from my initial plan. Main bearing Initially, I wanted the big bearing to be able to be removed from the hub easily. But it just proved too difficult to design, and not worth the far increased complexity. So, I went with the option to put the bearing inside a part that holds it while 3d printing, so that it becomes trapped inside. This part will be strong enough. It takes drifting on pavement with a brushless model to break a smaller amount of plastic. This will be plenty strong for slow models. How do you do it? Once you put the parts into your slicer and slice it, use the layer preview slider to go to the last layer before you can no longer drop the bearing in. Then add a pause, once you print the printer will stop automatically and you can drop the bearing in place! Then just continue the print and everything will work fine. The main body of the hub looks really scary to print, but at least on my printer it was super easy! I let my slicer auto orient it and it turned out perfectly. The holes for the small bearings are not as deep as the bearings so they stick out to ensure the gears never rub against the walls. The insert part has changed a bit since the original plan too. Now, it has 22 teeth, for a higher gear ratio and an astounding 1mm of extra ground clearance! Wow! The slicer thinks it should print with support, but it doesn't need it at all. And finally, a video of the hub and how it all goes together. STL files: https://bricksafe.com/pages/Aurorasaurus/miscellaneous/ultimate-portal-hubs-/with-bearings/first-successful-version
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I agree, I was excited for space sets last year but then they were kinda underwhelming as an AFOL. Maybe part of the problem is us becoming better builders so all of Lego's offerings aren't sufficiently better than what we think we could do. Especially with the higher prices and lower quality of the parts these days... It feels like they're trying to convince unknowing customers that Lego must be so much better than clones by just making the price difference even more. Not advocating for clone brands, but I'm aware of growing awareness of them.
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Thank you!! For recording I'm using a Samsung S25. My daily phone, an s23fe, seems to produce a good quality too. Maybe for avoiding the reflections, point the lights lower or higher? For me both work, because I have a shelf above to bounce some light back and diffuse nicely. I noticed your background is very dark, much more black than gray. Black is unforgiving, a lighter one would probably look better. Maybe you can make one from stuff you have laying around to try it out.
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For me, using a phone, I like to have it back pretty far and use 3x zoom, which is just as clear on my phone (telephoto or something?) and gives a much less distorted image. Maybe that helps with focus too since its further away? Here's a link to a video with some parts filmed like that, keep in mind youtube compression has no mercy. I really like filming just with a phone, its not as expensive or complicated as a fancy camera, but to my eyes its easily "good enough" Keeping everything nice and bright really makes a huge difference, if you don't have big lights it might be time to get some. I'm enjoying this conversation and I'd love to see what video you get at the end (or right now!)
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Heres the one I was thinking of. It seems to have messed up my text box on mobile so sorry if there's misplaced characters or weird formatting. My personal photo setup is just my windowblind draped down the back of some industrial shelves. Then a family member happened to have some big lights (they have a bulb bigger than I've ever seen in a normal store and go inside what feels like a big metal cooking bowl) and a tripod so I borrow those as I need them. Heres my favourite photo with that setup, I just take photos on a pretty new smartphone and they look pretty good to my eyes. Hopefully this helps
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The video title is overhauled, did the front wheel hubs change? I've only ever briefly looked at that model but the use of the 3 ball and 1 pinhole wheel hubs struck me as a poor choice; links popping off and low steering precision plague lego models using them. Cada offering a proportional control system seems like a good step if they can do it with a nicely integrated physical remote and a decent servo.
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8466 Diffs orientation
Aurorasaurus replied to Chilly's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I dont have one, but as long as the line between the two axles is not changing direction somewhere, the diffs should be flipped at one end. If you think about how turning the gears would turn the central shaft you can see why. If you pick the model up and spin both the back wheels, do the front wheels go the other direction? Then you need to change one of the diffs. Otherwise the problem may be elsewhere. Good luck! -
As some people mentioned earlier, a version of this hub with bearings would be even better. The original might work with injection moulded parts but 3d printing them at home just wasnt an option for using this concept in an actual model. So I've started designing one with bearings. I'm using a 25x37x7 (25mm id) bearing to go around the "insert" part, so that it isn't hanging in the air or leaning too much on one side of a further back bearing. Then I'm using 5x8x2.5mm bearings for all the axle and gear parts. As Zerobricks suggested earlier, I've combined the insert and the lower gear part, for simplicity and strength. I'm also using a 12:20 ratio instead of 8:24, because as we all know, 8t gears are much too weak. The big bearing will drop into the main housing, then the insert goes in. Then, from another direction, because it would otherwise collide with the main bearing when you try put that in, a separate part with the 5x8x2.5 bearings drops in. Maybe I will have that get fixed in place with a clip or something, not sure yet. Then you put the 12t gear in, then axles, and finally the wheel. Here's a video of the whole process in reverse. (easier to make the animation in reverse) I can upload CAD files but this is very WIP so I haven't as of posting. Roughly sketched in black is roughly how I will do the rest of this thing, simply more parts joining onto that front ring to hold everything else, but at this stage many things can change. I'd love some feedback, am I going in the right direction here? Is anybody else working on this/made it already?
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Ngoc's Technic Corner
Aurorasaurus replied to Ngoc Nguyen's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hmm, what is it then? -
Ngoc's Technic Corner
Aurorasaurus replied to Ngoc Nguyen's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Land rover?