2GodBDGlory

Very nicely done, and well presented! It feels like it has everything you could ask for in a dump truck, with lots of detail and functions. RC pneumatics are always cool, and I really like that servo valve control solution! Very compact and elegant. One question, though: Why did you use an old-style differential on the front axle? It looks like you had to go to a lot of effort to keep the same gearing despite using it?

Looks like an upcoming Botanical polybag will be including two of the Daytona differential ring gears! Those should match up nicely with all the surplus pinion gears from the 42168 John Deere Forage Harvester, to make the whole assembly cheaper to acquire

Oh, I see now! That's cool

That's cool to see! I remember this model clearly from my many hours spent with Sariel's Incredible Lego Technic. Looks like it's been well updated with modern parts!

Yeah, those new parts aren't cheap! I got myself a set of those driving rings and 24T clutches off AliExpress to save money. I will say my driving rings feel pretty loose, but then I don't have any Lego ones to compare them to, so I don't know if it's normal or not.

Huh, I'm seeing it at only $150 off, but either way, that's a bigger discount than you'd usually expect to see outside of Europe! https://www.costco.ca/lego-liebherr-crawler-crane-lr-13000---42146.product.4000194869.html

Looks good! I'd agree that I prefer the longer design too, at least if you can find space for it. You said something about "old" driving rings, though--just to clarify, you won't be able to use the old 2L one with this gearbox, since it doesn't mesh with any of the post-2015 clutch gears. You'll need the new 2L ones from the Yamaha set Yeah, it is a real bummer that there's no clutch interface in that 28T gear. They were able to fit it into a half-stud space on the other end of the differential, so why couldn't they have added one on the gear side as well? Sigh

Ok, yeah! I've heard lots of good things about those A1's, but I'm too cheap, and maybe a bit too committed to more DIY-friendly printers to go for one just yet! So, the heavily modified old Ender 3 gets to keep on working! I haven't actually ever gotten it to successfully print with a nozzle smaller than 0.4, though. I wonder if there's settings I ought to look at for that sometime

Cool stuff! I take it those plastic gears are commercially available? Not having enough resolution to print something like that was always my mental barrier to trying to design anything like this (Well, I guess more to print replacement parts for Lego planetary hubs) Also, lots of other cool stuff on your Makerworld! I'll have to print some of it!

These models do have such interesting engineering! What did you use to build it? Are there instructions or a 3D model for it, or was it reverse-engineering?

Looks like a fun model! Very big, and I do like some good DBG!

Looks very nice! Are you using some kind of consumer USB extender in there for easier charging?

Another option that might have slightly less stress on those gears would be to build it such that the axlehole on the gear only goes to pinholes on the steering beam. Normally, that would make the gear do nothing, but if you left that 2L beam on the top, it would fit between two of the teeth and fix the gear to the arm. It would just then have the advantage that the beam isn't forcing the gear to rotate a half-tooth away from where the axle fits it. Nice work, though!

I like the gearbox complexity! Looks like you're putting some real effort into it. I also like the torsen diff! It's something that seems to be thrown around as a concept a lot, but rarely ever put into a model. That design is about as practical as it gets, though! I haven't seen the one with a turntable on each side, and it could be made skinnier by replacing one of them with a connector, but maybe the extra strength is worth it

I'm not sure I understand the thinking there. If you directly replaced a shock with a linear actuator, wouldn't you lose all suspension? Wouldn't the actuator take all the weight of the car, and prevent the shock from ever compressing? Or are you talking about something else

Fun model! The straight-8 and steering linkage are both pretty cool!

That is an interesting thought, though. It would be neat to have a fancy stand the car can sit on, with, say, motorized rollers that sit under the wheels, so you could flip a switch on the side of the frame and drive the car's wheels that way, for easy gearbox demonstration

Thanks for setting up another great contest! Lots of great entries in there, and the winners definitely deserve it!

Ooh, very nice! It's always fun to see models of people's personal cars, and that looks like it would have been a fun one to have!

Wow, a Panhard rod to keep the subframe from moving! That's some wild engineering!

Alright, thanks!

When are we expecting voting to finish/results to be released? Thanks!

I've looked into that, but there's surprisingly few wheels that actually clear the shock absorber in that setup, and it doesn't give any kingpin inclination. It is an interesting idea, though!

Well, reflashing a different SD card seems to have solved the problem, so I guess I just bumped an ancient thread for no particular reason. Sorry!

This looks like it might be the correct topic to talk about this issue in... I'm working on a project using a Mindstorms EV3 running EV3dev with Python coding. I had written my code and gotten everything working the way I wanted, and had successful tests, but then the rechargeable AA batteries I was using in it died. I'd been wanting to have it powered from the wall eventually, so while I was charging them, I rigged up a basic battery eliminator sort of thing, with the positive and negative contacts wired to the contacts of a USB-chargeable 9V battery, which I then plugged in via USB. After doing this, it booted up just fine, but a couple other issues became apparent. When I went to the File Browser on the brick and tried to select my program as before, nothing would happen, except that a new file under it would appear with the name main.py.err.log, and the same thing would happen for any program loaded on to the brick. Second, when I plugged it back into my computer over USB and tried re-connecting to VSCode, it would start the process, and then fail, giving me me an "Exit code 127" message. After that I wondered if I just didn't have enough amperage, so I plugged it in to a 9V transformer, with the same symptoms of powering on but not working. I then put AA batteries back in, and it still didn't work right! I also tried removing the EV3Dev SD card, rebooting, powering down, reinserting it, and rebooting again, but nothing changed. Does anyone have any idea what's going on here? It's a core part of a larger project that I've been working hard at for a good while, and that I had pretty much just got working, so I'd be really disappointed if I couldn't get it working again! Any help would be appreciated! [EDIT] My next step will probably be restoring the stock firmware and seeing if I can get programs to run on it. If that works, perhaps I could just rewrite my code in whatever the standard is for EV3 and go with that? Or maybe I need to try reflashing the EV3dev SD card